US StockDetailed Quotes

Provided by Tiger Trade Technology Pte. Ltd.

MDU Resources

20.40

+0.05000.25%

Post-market: 20.400.00000.00%16:10 EDT

Volume:1.43M

Turnover:29.19M

Market Cap:4.17B

PE:22.05

High:20.56

Open:20.19

Low:20.19

Close:20.35

52wk High:21.49

52wk Low:15.04

Shares:204.38M

Float Shares:201.59M

Volume Ratio:0.65

T/O Rate:0.71%

Dividend:0.54

Dividend Rate:2.65%

EPS(TTM):0.9251

EPS(LYR):0.9251

ROE:7.01%

ROA:2.49%

PB:1.50

PE(LYR):22.05

Loading ...

Overview Company News Filings

Beneficial Ownership Change

SC 13G - Statement of acquisition of beneficial ownership by individuals

Major Issues Report

8-K - Current report

Beneficial Ownership Change

SC 13G/A [Amend] - Statement of acquisition of beneficial ownership by individuals

Major Issues Report

8-K - Current report

Major Issues Report

8-K - Current report

Major Issues Report

8-K - Current report

Major Issues Report

8-K - Current report

Quarterly Report

10-Q - Quarterly report [Sections 13 or 15(d)]

Major Issues Report

8-K - Current report

Major Issues Report

8-K - Current report

Quarterly Report

10-Q - Quarterly report [Sections 13 or 15(d)]

Quarterly Report

10-Q - Quarterly report [Sections 13 or 15(d)]

Major Issues Report

8-K - Current report

Employee Stock Ownership

11-K - Annual report of employee stock purchase, savings and similar plans

Major Issues Report

8-K - Current report

Quarterly Report

Quarterly report [Sections 13 or 15(d)]

Major Issues Report

Current report, items 2.02, 7.01, and 9.01

Annual Report

Annual report [Section 13 and 15(d), not S-K Item 405]

Beneficial Ownership Change

Statement of acquisition of beneficial ownership by individuals

Beneficial Ownership Change

[Amend] Statement of acquisition of beneficial ownership by individuals

{"basename":"","ssrTDKData":{"titleTemplate":"%s - Tiger Brokers","title":"Tiger Brokers | Global Stocks, Options & Futures Trading App","description":"Tiger Brokers, one-stop investment in US stocks, SGX stocks, HK stocks, A-shares & other global assets. One of the best stock trading platforms in Singapore.","keywords":"tiger brokers,tiger trade,tiger brokers singapore,broker online,stock trading in singapore,share trading singapore,brokerage firm singapore,trading app,stock broker singapore,stock trading platforms,trading account","social":{"ogDescription":"Tiger Brokers, one-stop investment in US stocks, SGX stocks, HK stocks, A-shares & other global assets. One of the best stock trading platforms in Singapore.","ogImage":"https://c1.itigergrowtha.com/portal5/static/media/og-logo.be62fbe1.png","ogUrl":"https://www.itiger.com/stock/MDU/filings?page=7"},"companyName":"Tiger Brokers"},"pageData":{"isMobile":false,"isTiger":false,"isTTM":true,"region":"SGP","license":"TBSG","edition":"fundamental","symbol":"MDU","isAnalysisPage":false},"__swrFallback__":{"@#url:\"https://hq.skytigris.cn/stock_info/detail/global\",params:#delay:false,,method:\"POST\",data:#items:@#symbol:\"MDU\",,,,,undefined,":{"symbol":"MDU","market":"US","secType":"STK","nameCN":"MDU Resources","latestPrice":20.4,"timestamp":1773950400000,"preClose":20.35,"halted":0,"volume":1432212,"hourTrading":{"tag":"盘后","latestPrice":20.4,"preClose":20.4,"latestTime":"16:10 EDT","volume":40845,"amount":833238,"timestamp":1773951005040,"change":0,"changeRate":0,"amplitude":0},"delay":0,"changeRate":0.0024570024570023173,"floatShares":201591967,"shares":204382800,"eps":0.925129,"marketStatus":"Post-Mkt","change":0.05,"latestTime":"03-19 16:50:02 EDT","open":20.19,"high":20.555,"low":20.185,"amount":29187454.997433,"amplitude":0.018182,"askPrice":20.68,"askSize":72,"bidPrice":20.1,"bidSize":74,"shortable":3,"etf":0,"ttmEps":0.925129,"tradingStatus":3,"nextMarketStatus":{"tag":"Closed","tradingStatus":0,"beginTime":1773964800000},"marketStatusCode":4,"adr":0,"adrRate":0,"listingDate":838958400000,"exchange":"NYSE","adjPreClose":20.35,"dividendRate":0.026471,"preHourTrading":{"tag":"盘前","latestPrice":20.35,"preClose":20.35,"latestTime":"08:02 EDT","volume":1,"amount":20.35,"timestamp":1773921727532,"change":0,"changeRate":0,"amplitude":0},"postHourTrading":{"tag":"盘后","latestPrice":20.4,"preClose":20.4,"latestTime":"16:10 EDT","volume":40845,"amount":833238,"timestamp":1773951005040,"change":0,"changeRate":0,"amplitude":0},"volumeRatio":0.648996,"impliedVol":0.242,"impliedVolPercentile":0.3347},"@#url:\"https://hq.skytigris.cn/stock_info/fundamental/all\",params:#delay:false,,method:\"POST\",data:#items:@#symbol:\"MDU\",,,,,undefined,":{"symbol":"MDU","floatShares":201591967,"roa":"2.49%","roe":"7.01%","lyrEps":0.925129,"volumeRatio":0.648996,"shares":204382800,"dividePrice":0.54,"high":20.555,"amplitude":0.018182,"preClose":20.35,"low":20.185,"week52Low":15.04,"pbRate":"1.50","psRate":"2.22","week52High":21.49,"institutionHeld":0.9708,"latestPrice":20.4,"committee":0.013699,"eps":0.925129,"divideRate":0.026471,"volume":1432212,"delay":0,"ttmEps":0.925129,"open":20.19,"prevYearClose":19.52,"prevWeekClose":21.1,"prevMonthClose":20.68,"prevQuarterClose":19.52,"fiveDayClose":20.9,"twentyDayClose":20.25,"sixtyDayClose":19.17,"dividendPayoutRate":0.5794121970559423,"dividendFrequency":"Q","dividendGrowthYears":1,"dividendGrowthRate":0.058823529411764754,"fiveYearAvgDividendRate":0.02948874103737888},"@#url:\"https://hq.skytigris.cn/fundamental/corporate_actions/details/MDU\",params:#limit:5,,,undefined,":[{"date":"2026-03-12","symbol":"MDU","amount":0.14,"announcedDate":"2026-02-19","type":"dividend","lastAmount":null,"market":"US","newRecordDate":"2026-03-12","defaultRemindTime":1773322200000,"name":"MDU Resources Group Inc","lastCurrency":null,"lastExecuteDate":null,"recordDate":"2026-04-01","payableDate":"2026-03-12","currency":"USD","dateTimestamp":1773288000000,"payDate":"2026-04-01"},{"market":"US","date":"2026-02-05","symbol":"MDU","fiscalQuarterEnding":"2025/12","expectedEps":0.37,"name":null,"time":"Pre-Market","type":"earning","dateTimestamp":1770267600000,"reportTimeType":"pre","actualEps":0.34},{"date":"2025-12-11","symbol":"MDU","amount":0.14,"announcedDate":"2025-11-13","type":"dividend","lastAmount":null,"market":"US","newRecordDate":"2025-12-11","defaultRemindTime":1765463400000,"name":"MDU Resources Group Inc","lastCurrency":null,"lastExecuteDate":null,"recordDate":"2026-01-01","payableDate":"2025-12-11","currency":"USD","dateTimestamp":1765429200000,"payDate":"2026-01-01"},{"market":"US","date":"2025-11-06","symbol":"MDU","fiscalQuarterEnding":"2025/09","expectedEps":0.07,"name":null,"time":"Pre-Market","type":"earning","dateTimestamp":1762405200000,"reportTimeType":"pre","actualEps":0.09},{"date":"2025-09-11","symbol":"MDU","amount":0.14,"announcedDate":"2025-08-14","type":"dividend","lastAmount":null,"market":"US","newRecordDate":"2025-09-11","defaultRemindTime":1757597400000,"name":"MDU Resources Group Inc","lastCurrency":null,"lastExecuteDate":null,"recordDate":"2025-10-01","payableDate":"2025-09-11","currency":"USD","dateTimestamp":1757563200000,"payDate":"2025-10-01"}],"@#url:\"https://hq.skytigris.cn/fundamental/dividend/history\",params:#symbol:\"MDU\",market:\"US\",,,undefined,":[{"executeDate":"2016-06-07","recordDate":"2016-06-09","paymentDate":"2016-07-01","value":0.1875,"currency":"USD"},{"executeDate":"2016-09-06","recordDate":"2016-09-08","paymentDate":"2016-10-01","value":0.1875,"currency":"USD"},{"executeDate":"2016-12-06","recordDate":"2016-12-08","paymentDate":"2017-01-01","value":0.1925,"currency":"USD"},{"executeDate":"2017-03-07","recordDate":"2017-03-09","paymentDate":"2017-04-01","value":0.1925,"currency":"USD"},{"executeDate":"2017-06-06","recordDate":"2017-06-08","paymentDate":"2017-07-01","value":0.1925,"currency":"USD"}],"@#url:\"https://hq.skytigris.cn/fundamental/estimate/recommendation\",params:#symbol:\"MDU\",market:\"US\",delay:false,,,undefined,":{"strongBuy":0.5714,"buy":0,"hold":0.4286,"sell":0,"strongSell":0,"meanLabel":"BUY","meanPercent":0,"analysts":7,"updateTime":1766635200000},"@#url:\"https://hq.skytigris.cn/value_analysis/stock/MDU\",params:#withQuantilePoint:true,period:\"5year\",factor:\"peRate\",delay:false,algorithm:1,,,undefined,":{"brief":{"id":"MDU","date":"2026-03-18","current":22.050979,"percent":0.93745,"low":7.56446,"twenty":11.03685,"median":14.608517,"eighty":17.225409,"high":25.756639,"avg":14.599187,"sd":3.737434,"marketCap":4169409548},"quantilePoints":[{"date":"2021-03-19","current":15.786687,"twenty":-9.049186,"median":15.029137,"eighty":18.930074,"marketCap":6160044349},{"date":"2021-03-26","current":16.079604,"twenty":-9.048525,"median":15.07816,"eighty":18.929887,"marketCap":6274342047},{"date":"2021-04-01","current":16.396474,"twenty":-9.048525,"median":15.132923,"eighty":18.929887,"marketCap":6397986276},{"date":"2021-04-09","current":16.381006,"twenty":-9.049186,"median":15.219932,"eighty":18.930074,"marketCap":6391950440},{"date":"2021-04-16","current":16.937867,"twenty":-9.049186,"median":15.314755,"eighty":18.930074,"marketCap":6609240540},{"date":"2021-04-23","current":17.242079,"twenty":-9.049186,"median":15.389414,"eighty":18.930074,"marketCap":6727945317},{"date":"2021-04-30","current":17.252391,"twenty":-9.049186,"median":15.429856,"eighty":18.930074,"marketCap":6731969208},{"date":"2021-05-07","current":16.661484,"twenty":-9.049186,"median":15.501696,"eighty":18.930074,"marketCap":6951271253},{"date":"2021-05-14","current":16.61326,"twenty":-9.049186,"median":15.543744,"eighty":18.930074,"marketCap":6931151799},{"date":"2021-05-21","current":16.338382,"twenty":-9.049186,"median":15.59931,"eighty":18.930074,"marketCap":6816470913},{"date":"2021-05-28","current":16.232288,"twenty":-9.049186,"median":15.739128,"eighty":18.930074,"marketCap":6772208115},{"date":"2021-06-04","current":16.299802,"twenty":-9.049186,"median":15.776481,"eighty":18.930074,"marketCap":6800375350},{"date":"2021-06-11","current":16.077971,"twenty":-9.049186,"median":15.873323,"eighty":18.930074,"marketCap":6707825863},{"date":"2021-06-18","current":14.780738,"twenty":-9.049186,"median":15.873323,"eighty":18.930074,"marketCap":6166612559},{"date":"2021-06-25","current":15.393186,"twenty":-9.048525,"median":15.857181,"eighty":18.929887,"marketCap":6422129621},{"date":"2021-07-02","current":15.195467,"twenty":-9.048525,"median":15.857181,"eighty":18.929887,"marketCap":6339639860},{"date":"2021-07-09","current":15.065261,"twenty":-9.048525,"median":15.857181,"eighty":18.929887,"marketCap":6285317335},{"date":"2021-07-16","current":15.12313,"twenty":-9.048525,"median":15.857181,"eighty":18.929887,"marketCap":6309460680},{"date":"2021-07-23","current":15.166532,"twenty":-9.048525,"median":15.857181,"eighty":18.929887,"marketCap":6327568188},{"date":"2021-07-30","current":15.296738,"twenty":-9.048525,"median":15.857181,"eighty":18.929887,"marketCap":6381890713},{"date":"2021-08-06","current":15.934979,"twenty":-9.043896,"median":15.889465,"eighty":18.929887,"marketCap":6655928978},{"date":"2021-08-13","current":15.983443,"twenty":-9.004882,"median":15.927008,"eighty":18.929887,"marketCap":6676172071},{"date":"2021-08-20","current":15.702351,"twenty":-8.9824,"median":15.930576,"eighty":18.929887,"marketCap":6558762132},{"date":"2021-08-27","current":15.673273,"twenty":-8.969175,"median":15.930576,"eighty":18.929887,"marketCap":6546616276},{"date":"2021-09-03","current":15.590884,"twenty":-8.953305,"median":15.930576,"eighty":18.929887,"marketCap":6512203018},{"date":"2021-09-10","current":14.951158,"twenty":-8.934129,"median":15.930576,"eighty":18.929887,"marketCap":6244994190},{"date":"2021-09-17","current":14.524675,"twenty":-8.899082,"median":15.930576,"eighty":18.929887,"marketCap":6066854972},{"date":"2021-09-24","current":14.277508,"twenty":-8.840893,"median":15.930576,"eighty":18.929887,"marketCap":5963615197},{"date":"2021-10-01","current":14.684606,"twenty":-8.822378,"median":15.930576,"eighty":18.929887,"marketCap":6133657179},{"date":"2021-10-08","current":14.946312,"twenty":-8.753608,"median":15.930576,"eighty":18.929887,"marketCap":6242969881},{"date":"2021-10-15","current":15.004469,"twenty":-8.717239,"median":15.930576,"eighty":18.929887,"marketCap":6267261592},{"date":"2021-10-22","current":15.115936,"twenty":-8.641857,"median":15.930576,"eighty":18.929887,"marketCap":6313820706},{"date":"2021-10-29","current":14.893002,"twenty":-8.625325,"median":15.928792,"eighty":18.9297,"marketCap":6220702478},{"date":"2021-11-05","current":14.510272,"twenty":11.127817,"median":15.928792,"eighty":18.9297,"marketCap":5860568326},{"date":"2021-11-12","current":14.55055,"twenty":11.85635,"median":15.928792,"eighty":18.9297,"marketCap":5876836386},{"date":"2021-11-19","current":14.334054,"twenty":12.323536,"median":15.928792,"eighty":18.9297,"marketCap":5789395567},{"date":"2021-11-26","current":14.238393,"twenty":12.446307,"median":15.928792,"eighty":18.9297,"marketCap":5750758927},{"date":"2021-12-03","current":14.157837,"twenty":12.570815,"median":15.928792,"eighty":18.9297,"marketCap":5718222808},{"date":"2021-12-10","current":14.389437,"twenty":12.621353,"median":15.928792,"eighty":18.9297,"marketCap":5811764149},{"date":"2021-12-17","current":14.731803,"twenty":12.697566,"median":15.928792,"eighty":18.9297,"marketCap":5950042652},{"date":"2021-12-23","current":14.847603,"twenty":12.751353,"median":15.928792,"eighty":18.9297,"marketCap":5996813322},{"date":"2021-12-31","current":15.5273,"twenty":12.820427,"median":15.928792,"eighty":18.9297,"marketCap":6271336821},{"date":"2022-01-07","current":15.834423,"twenty":12.87255,"median":15.927008,"eighty":18.929513,"marketCap":6395380773},{"date":"2022-01-14","current":15.335978,"twenty":12.934243,"median":15.927008,"eighty":18.929513,"marketCap":6194063540},{"date":"2022-01-21","current":14.595864,"twenty":13.004597,"median":15.927008,"eighty":18.929513,"marketCap":5895137952},{"date":"2022-01-28","current":14.671386,"twenty":13.0509,"median":15.918515,"eighty":18.929326,"marketCap":5925640563},{"date":"2022-02-04","current":14.359228,"twenty":13.11976,"median":15.918515,"eighty":18.929326,"marketCap":5799563104},{"date":"2022-02-11","current":14.64371,"twenty":13.141401,"median":15.918515,"eighty":18.929326,"marketCap":5537240650},{"date":"2022-02-18","current":14.848066,"twenty":13.168446,"median":15.918515,"eighty":18.929326,"marketCap":5614513931},{"date":"2022-02-25","current":14.579176,"twenty":13.197467,"median":15.918515,"eighty":18.929326,"marketCap":5512838561},{"date":"2022-03-04","current":14.22962,"twenty":13.234754,"median":15.918515,"eighty":18.929326,"marketCap":5380660580},{"date":"2022-03-11","current":13.546642,"twenty":13.251682,"median":15.918515,"eighty":18.929326,"marketCap":5122405140},{"date":"2022-03-18","current":13.853175,"twenty":13.279517,"median":15.918515,"eighty":18.929326,"marketCap":5238315062},{"date":"2022-03-25","current":13.799398,"twenty":13.286426,"median":15.918515,"eighty":18.929326,"marketCap":5217979988},{"date":"2022-04-01","current":14.412465,"twenty":13.302807,"median":15.918515,"eighty":18.929326,"marketCap":5449799832},{"date":"2022-04-08","current":14.412465,"twenty":13.325055,"median":15.918515,"eighty":18.929326,"marketCap":5449799832},{"date":"2022-04-14","current":14.611443,"twenty":13.358793,"median":15.918515,"eighty":18.929326,"marketCap":5525039605},{"date":"2022-04-22","current":14.654465,"twenty":13.385654,"median":15.918515,"eighty":18.929326,"marketCap":5541307665},{"date":"2022-04-29","current":13.853175,"twenty":13.412739,"median":15.918515,"eighty":18.929326,"marketCap":5238315062},{"date":"2022-05-06","current":14.550915,"twenty":13.429118,"median":15.918515,"eighty":18.929326,"marketCap":5205778944},{"date":"2022-05-13","current":14.704382,"twenty":13.460897,"median":15.918515,"eighty":18.929326,"marketCap":5260683643},{"date":"2022-05-20","current":15.102258,"twenty":13.518651,"median":15.918515,"eighty":18.929326,"marketCap":5403029161},{"date":"2022-05-27","current":15.602446,"twenty":13.547905,"median":15.918515,"eighty":18.929326,"marketCap":5581977813},{"date":"2022-06-03","current":15.556974,"twenty":13.57829,"median":15.918515,"eighty":18.929326,"marketCap":5565709753},{"date":"2022-06-10","current":15.403508,"twenty":13.636479,"median":15.918515,"eighty":18.929326,"marketCap":5510805054},{"date":"2022-06-17","current":14.795325,"twenty":13.685473,"median":15.918515,"eighty":18.929326,"marketCap":5293219762},{"date":"2022-06-24","current":15.812752,"twenty":13.709648,"median":15.927008,"eighty":18.929513,"marketCap":5657217586},{"date":"2022-07-01","current":15.727493,"twenty":13.736824,"median":15.927008,"eighty":18.929513,"marketCap":5626714975},{"date":"2022-07-08","current":15.198885,"twenty":13.76515,"median":15.927008,"eighty":18.929513,"marketCap":5437598787},{"date":"2022-07-15","current":15.272777,"twenty":13.800566,"median":15.927008,"eighty":18.929513,"marketCap":5464034383},{"date":"2022-07-22","current":15.323932,"twenty":13.820435,"median":15.927008,"eighty":18.929513,"marketCap":5482335950},{"date":"2022-07-29","current":16.239048,"twenty":13.84461,"median":15.934979,"eighty":18.929513,"marketCap":5809730641},{"date":"2022-08-05","current":18.089939,"twenty":13.861899,"median":15.949167,"eighty":18.929513,"marketCap":5937841608},{"date":"2022-08-12","current":19.328976,"twenty":13.895475,"median":15.990488,"eighty":18.937813,"marketCap":6344543088},{"date":"2022-08-19","current":19.756444,"twenty":13.916956,"median":16.077971,"eighty":18.959153,"marketCap":6484855098},{"date":"2022-08-26","current":19.260829,"twenty":13.926903,"median":16.123795,"eighty":18.974807,"marketCap":6322174506},{"date":"2022-09-02","current":18.554578,"twenty":13.947576,"median":16.182382,"eighty":18.977295,"marketCap":6090354663},{"date":"2022-09-09","current":18.95107,"twenty":13.982242,"median":16.198531,"eighty":18.977295,"marketCap":6220499136},{"date":"2022-09-16","current":18.269599,"twenty":14.047785,"median":16.232288,"eighty":18.977295,"marketCap":5996813322},{"date":"2022-09-23","current":17.501397,"twenty":14.098987,"median":16.267571,"eighty":18.977295,"marketCap":5744658405},{"date":"2022-09-30","current":16.94383,"twenty":14.128366,"median":16.299802,"eighty":18.977295,"marketCap":5561642739},{"date":"2022-10-07","current":17.148271,"twenty":14.156738,"median":16.348027,"eighty":18.977295,"marketCap":5628748483},{"date":"2022-10-14","current":17.086319,"twenty":14.199999,"median":16.396251,"eighty":18.977295,"marketCap":5608413409},{"date":"2022-10-21","current":17.730618,"twenty":14.227451,"median":16.446897,"eighty":18.977295,"marketCap":5819898178},{"date":"2022-10-28","current":17.761594,"twenty":14.252888,"median":16.478232,"eighty":18.977295,"marketCap":5830065715},{"date":"2022-11-04","current":17.502401,"twenty":14.265547,"median":16.510374,"eighty":18.974807,"marketCap":5897171460},{"date":"2022-11-11","current":18.250779,"twenty":14.265547,"median":16.510374,"eighty":18.959657,"marketCap":6149326377},{"date":"2022-11-18","current":18.449945,"twenty":14.265547,"median":16.510374,"eighty":18.94355,"marketCap":6216432121},{"date":"2022-11-25","current":18.968981,"twenty":14.265547,"median":16.510374,"eighty":18.932428,"marketCap":6391313758},{"date":"2022-12-02","current":19.041405,"twenty":14.265547,"median":16.510374,"eighty":18.929513,"marketCap":6415715847},{"date":"2022-12-09","current":18.468051,"twenty":14.265547,"median":16.510374,"eighty":18.903173,"marketCap":6222532644},{"date":"2022-12-16","current":17.804166,"twenty":14.265547,"median":16.510374,"eighty":18.894585,"marketCap":5998846830},{"date":"2022-12-23","current":18.347344,"twenty":14.265547,"median":16.510374,"eighty":18.877709,"marketCap":6181862496},{"date":"2022-12-30","current":18.311133,"twenty":14.265547,"median":16.510374,"eighty":18.868818,"marketCap":6169661451},{"date":"2023-01-06","current":18.425803,"twenty":14.265547,"median":16.510374,"eighty":18.849464,"marketCap":6208298092},{"date":"2023-01-13","current":18.655145,"twenty":14.265547,"median":16.510374,"eighty":18.829946,"marketCap":6285571373},{"date":"2023-01-20","current":18.130073,"twenty":14.265547,"median":16.510374,"eighty":18.814311,"marketCap":6108656229},{"date":"2023-01-27","current":18.468051,"twenty":14.265547,"median":16.510374,"eighty":18.791613,"marketCap":6222532644},{"date":"2023-02-03","current":18.715498,"twenty":14.265547,"median":16.510374,"eighty":18.781981,"marketCap":6305906447},{"date":"2023-02-10","current":17.037705,"twenty":14.265547,"median":16.510374,"eighty":18.778193,"marketCap":6261169284},{"date":"2023-02-17","current":17.441652,"twenty":14.265547,"median":16.510374,"eighty":18.771719,"marketCap":6409615324},{"date":"2023-02-24","current":17.707261,"twenty":14.265547,"median":16.510374,"eighty":18.766199,"marketCap":6507223680},{"date":"2023-03-03","current":17.531572,"twenty":14.265547,"median":16.510374,"eighty":18.763275,"marketCap":6442659974},{"date":"2023-03-10","current":16.539742,"twenty":14.265547,"median":16.510374,"eighty":18.763275,"marketCap":6078173206},{"date":"2023-03-17","current":16.085384,"twenty":14.265547,"median":16.478232,"eighty":18.747649,"marketCap":5911201613},{"date":"2023-03-24","current":16.102007,"twenty":14.265547,"median":16.453245,"eighty":18.723803,"marketCap":5917310330},{"date":"2023-03-31","current":16.888822,"twenty":14.266406,"median":16.450071,"eighty":18.707391,"marketCap":6206456258},{"date":"2023-04-06","current":16.534201,"twenty":14.266406,"median":16.450071,"eighty":18.684407,"marketCap":6076136967},{"date":"2023-04-14","current":16.661643,"twenty":14.265547,"median":16.446897,"eighty":18.668039,"marketCap":6122970462},{"date":"2023-04-21","current":16.52866,"twenty":14.265547,"median":16.43483,"eighty":18.646821,"marketCap":6074100728},{"date":"2023-04-28","current":16.113089,"twenty":14.265547,"median":16.405896,"eighty":18.626513,"marketCap":5921382808},{"date":"2023-05-05","current":15.459084,"twenty":14.265547,"median":16.395677,"eighty":18.616942,"marketCap":5782918561},{"date":"2023-05-12","current":15.895681,"twenty":14.265547,"median":16.338382,"eighty":18.600863,"marketCap":5946240491},{"date":"2023-05-19","current":15.781363,"twenty":14.264687,"median":16.322435,"eighty":18.587145,"marketCap":5903476433},{"date":"2023-05-26","current":15.993668,"twenty":14.264687,"median":16.281178,"eighty":18.580491,"marketCap":5982895398},{"date":"2023-06-02","current":10.713254,"twenty":14.2628,"median":16.264397,"eighty":18.574328,"marketCap":4007603180},{"date":"2023-06-09","current":11.355613,"twenty":14.239186,"median":16.235668,"eighty":18.564022,"marketCap":4247896460},{"date":"2023-06-16","current":11.235851,"twenty":14.219716,"median":16.202108,"eighty":18.550183,"marketCap":4203096018},{"date":"2023-06-23","current":11.099758,"twenty":14.184156,"median":16.185073,"eighty":18.542016,"marketCap":4152186425},{"date":"2023-06-30","current":11.437269,"twenty":14.15509,"median":16.163507,"eighty":18.535087,"marketCap":4278442216},{"date":"2023-07-07","current":11.377388,"twenty":14.13282,"median":16.118442,"eighty":18.522368,"marketCap":4256041995},{"date":"2023-07-14","current":11.840105,"twenty":14.101291,"median":16.087724,"eighty":18.513144,"marketCap":4429134612},{"date":"2023-07-21","current":11.959867,"twenty":14.053591,"median":16.065804,"eighty":18.498227,"marketCap":4473935054},{"date":"2023-07-28","current":12.003417,"twenty":13.982242,"median":15.986966,"eighty":18.488077,"marketCap":4490226124},{"date":"2023-08-04","current":10.034405,"twenty":13.941824,"median":15.961006,"eighty":18.476571,"marketCap":4355824798},{"date":"2023-08-11","current":9.940261,"twenty":13.924561,"median":15.944673,"eighty":18.471409,"marketCap":4315097123},{"date":"2023-08-18","current":9.602508,"twenty":13.913614,"median":15.92946,"eighty":18.464191,"marketCap":4168477495},{"date":"2023-08-25","current":9.405485,"twenty":13.892169,"median":15.893566,"eighty":18.449945,"marketCap":4082949378},{"date":"2023-09-01","current":9.550907,"twenty":13.859602,"median":15.882582,"eighty":18.424097,"marketCap":4146077274},{"date":"2023-09-08","current":9.147479,"twenty":13.84461,"median":15.854861,"eighty":18.418284,"marketCap":3970948273},{"date":"2023-09-15","current":9.330429,"twenty":13.826286,"median":15.833225,"eighty":18.407217,"marketCap":4050367238},{"date":"2023-09-22","current":9.503997,"twenty":13.800699,"median":15.795765,"eighty":18.407217,"marketCap":4125713436},{"date":"2023-09-29","current":9.274137,"twenty":13.766543,"median":15.778223,"eighty":18.407217,"marketCap":4025930634},{"date":"2023-10-06","current":8.894165,"twenty":13.731696,"median":15.748223,"eighty":18.407217,"marketCap":3860983552},{"date":"2023-10-13","current":8.96453,"twenty":13.70951,"median":15.724615,"eighty":18.407217,"marketCap":3891529308},{"date":"2023-10-20","current":8.87071,"twenty":13.681511,"median":15.669702,"eighty":18.407217,"marketCap":3850801633},{"date":"2023-10-27","current":8.715906,"twenty":13.643931,"median":15.658215,"eighty":18.407506,"marketCap":3783600970},{"date":"2023-11-03","current":10.596737,"twenty":13.596937,"median":15.64135,"eighty":18.407506,"marketCap":3826365028},{"date":"2023-11-10","current":10.23093,"twenty":13.548954,"median":15.606333,"eighty":18.407506,"marketCap":3694000086},{"date":"2023-11-17","current":10.541129,"twenty":13.523081,"median":15.582367,"eighty":18.407506,"marketCap":3806001191},{"date":"2023-11-24","current":10.721609,"twenty":13.48177,"median":15.562658,"eighty":18.407506,"marketCap":3871165470},{"date":"2023-12-01","current":10.794928,"twenty":13.440955,"median":15.529743,"eighty":18.407506,"marketCap":3897638459},{"date":"2023-12-08","current":10.811848,"twenty":13.418043,"median":15.501696,"eighty":18.407409,"marketCap":3903747610},{"date":"2023-12-15","current":11.189727,"twenty":13.392694,"median":15.476952,"eighty":18.407409,"marketCap":4040185320},{"date":"2023-12-22","current":11.110768,"twenty":13.372268,"median":15.429435,"eighty":18.407409,"marketCap":4011675948},{"date":"2023-12-27","current":11.302527,"twenty":13.357534,"median":15.429435,"eighty":18.407409,"marketCap":4080912994},{"date":"2024-01-05","current":10.935928,"twenty":13.325714,"median":15.441709,"eighty":18.407698,"marketCap":3948548052},{"date":"2024-01-12","current":11.020528,"twenty":13.303281,"median":15.431927,"eighty":18.407698,"marketCap":3979093808},{"date":"2024-01-19","current":10.704689,"twenty":13.286455,"median":15.418928,"eighty":18.408306,"marketCap":3865056319},{"date":"2024-01-26","current":10.969768,"twenty":13.280847,"median":15.361152,"eighty":18.407698,"marketCap":3960766354},{"date":"2024-02-02","current":11.251767,"twenty":13.258413,"median":15.324187,"eighty":18.407698,"marketCap":4062585541},{"date":"2024-02-09","current":9.762071,"twenty":13.236125,"median":15.296738,"eighty":18.406445,"marketCap":4048330855},{"date":"2024-02-16","current":10.238389,"twenty":13.213545,"median":15.278461,"eighty":18.39271,"marketCap":4245860077},{"date":"2024-02-23","current":10.336599,"twenty":13.179894,"median":15.245352,"eighty":18.380716,"marketCap":4286587751},{"date":"2024-03-01","current":10.648432,"twenty":13.155831,"median":15.230147,"eighty":18.36581,"marketCap":4415979471},{"date":"2024-03-08","current":10.879279,"twenty":13.128981,"median":15.210093,"eighty":18.342491,"marketCap":4511713343},{"date":"2024-03-15","current":11.129773,"twenty":13.066604,"median":15.193055,"eighty":18.341309,"marketCap":4615594779},{"date":"2024-03-22","current":11.365532,"twenty":13.011597,"median":15.159745,"eighty":18.330211,"marketCap":4713365542},{"date":"2024-03-28","current":12.033515,"twenty":12.939852,"median":15.144644,"eighty":18.316328,"marketCap":4990382705},{"date":"2024-04-05","current":12.22998,"twenty":12.877037,"median":15.11931,"eighty":18.288185,"marketCap":5071858341},{"date":"2024-04-12","current":12.008956,"twenty":12.815344,"median":15.102258,"eighty":18.279536,"marketCap":4980198250},{"date":"2024-04-19","current":11.591467,"twenty":12.748042,"median":15.072318,"eighty":18.260885,"marketCap":4807062524},{"date":"2024-04-26","current":12.180864,"twenty":12.677375,"median":15.063865,"eighty":18.250779,"marketCap":5051489432},{"date":"2024-05-03","current":10.704036,"twenty":12.596614,"median":15.018197,"eighty":18.236076,"marketCap":5108522377},{"date":"2024-05-10","current":10.915291,"twenty":12.569694,"median":14.994776,"eighty":18.200843,"marketCap":5209344455},{"date":"2024-05-17","current":10.723045,"twenty":12.456775,"median":14.965698,"eighty":18.179279,"marketCap":5117594748},{"date":"2024-05-24","current":10.761494,"twenty":12.383048,"median":14.952887,"eighty":18.15417,"marketCap":5135944690},{"date":"2024-05-31","current":10.782855,"twenty":12.313577,"median":14.941465,"eighty":18.152972,"marketCap":5146139101},{"date":"2024-06-07","current":10.453901,"twenty":12.214218,"median":14.900711,"eighty":18.135955,"marketCap":4989145159},{"date":"2024-06-14","current":10.458173,"twenty":12.118245,"median":14.882534,"eighty":18.115591,"marketCap":4991184041},{"date":"2024-06-21","current":10.795671,"twenty":12.057854,"median":14.870786,"eighty":18.089939,"marketCap":5152255748},{"date":"2024-06-28","current":10.723045,"twenty":12.003417,"median":14.847603,"eighty":18.051614,"marketCap":5117594748},{"date":"2024-07-05","current":10.49235,"twenty":11.959867,"median":14.811647,"eighty":18.015428,"marketCap":5007495100},{"date":"2024-07-12","current":10.808488,"twenty":11.834661,"median":14.795325,"eighty":17.928864,"marketCap":5158372396},{"date":"2024-07-19","current":11.175891,"twenty":11.791111,"median":14.776688,"eighty":17.87659,"marketCap":5333716279},{"date":"2024-07-26","current":11.611648,"twenty":11.618855,"median":14.751942,"eighty":17.78018,"marketCap":5541682281},{"date":"2024-08-02","current":11.081904,"twenty":11.57182,"median":14.704382,"eighty":17.646323,"marketCap":5288860867},{"date":"2024-08-09","current":12.253423,"twenty":11.509117,"median":14.684606,"eighty":17.531572,"marketCap":4987106277},{"date":"2024-08-16","current":12.373653,"twenty":11.509117,"median":14.654465,"eighty":17.501397,"marketCap":5036039453},{"date":"2024-08-23","current":12.624131,"twenty":11.509117,"median":14.636174,"eighty":17.44564,"marketCap":5137983572},{"date":"2024-08-30","current":12.869601,"twenty":11.509117,"median":14.61191,"eighty":17.413985,"marketCap":5237888808},{"date":"2024-09-06","current":12.388681,"twenty":11.509117,"median":14.605933,"eighty":17.321736,"marketCap":5042156101},{"date":"2024-09-13","current":13.731248,"twenty":11.509117,"median":14.579176,"eighty":17.270113,"marketCap":5588576576},{"date":"2024-09-20","current":13.666123,"twenty":11.509117,"median":14.55055,"eighty":17.242079,"marketCap":5562071105},{"date":"2024-09-27","current":13.731248,"twenty":11.509117,"median":14.525377,"eighty":17.216298,"marketCap":5588576576},{"date":"2024-10-04","current":13.651094,"twenty":11.509117,"median":14.505237,"eighty":17.179247,"marketCap":5555954458},{"date":"2024-10-11","current":14.317368,"twenty":11.509117,"median":14.480063,"eighty":17.092551,"marketCap":5827125813},{"date":"2024-10-18","current":15.168996,"twenty":11.509117,"median":14.459924,"eighty":17.030678,"marketCap":6173735816},{"date":"2024-10-25","current":14.417559,"twenty":11.509117,"median":14.452627,"eighty":16.937867,"marketCap":5867903460},{"date":"2024-11-01","current":7.56446,"twenty":11.483484,"median":14.44606,"eighty":16.82233,"marketCap":3078712378},{"date":"2024-11-08","current":9.215735,"twenty":11.426382,"median":14.419646,"eighty":16.661643,"marketCap":3655716089},{"date":"2024-11-15","current":9.426468,"twenty":11.377388,"median":14.412465,"eighty":16.618083,"marketCap":3739310266},{"date":"2024-11-22","current":10.248843,"twenty":11.339282,"median":14.389437,"eighty":16.578529,"marketCap":4065531445},{"date":"2024-11-29","current":10.300241,"twenty":11.296769,"median":14.379283,"eighty":16.539742,"marketCap":4085920269},{"date":"2024-12-06","current":10.00727,"twenty":11.21952,"median":14.359228,"eighty":16.517578,"marketCap":3969703974},{"date":"2024-12-13","current":9.6886,"twenty":11.189727,"median":14.317368,"eighty":16.478791,"marketCap":3843293267},{"date":"2024-12-20","current":9.303112,"twenty":11.172807,"median":14.283769,"eighty":16.43483,"marketCap":3690377089},{"date":"2024-12-27","current":9.35451,"twenty":11.129773,"median":14.262969,"eighty":16.396251,"marketCap":3710765913},{"date":"2025-01-03","current":9.333951,"twenty":11.110768,"median":14.243428,"eighty":16.381006,"marketCap":3702610383},{"date":"2025-01-10","current":9.112938,"twenty":11.093225,"median":14.226909,"eighty":16.325268,"marketCap":3614938442},{"date":"2025-01-17","current":9.462447,"twenty":11.075268,"median":14.199316,"eighty":16.274884,"marketCap":3753582443},{"date":"2025-01-24","current":9.303112,"twenty":11.048728,"median":14.159477,"eighty":16.257365,"marketCap":3690377089},{"date":"2025-01-31","current":9.159196,"twenty":11.037249,"median":14.13282,"eighty":16.225253,"marketCap":3633288383},{"date":"2025-02-07","current":12.018257,"twenty":11.021479,"median":14.101634,"eighty":16.189242,"marketCap":3378428087},{"date":"2025-02-14","current":12.163317,"twenty":11.021479,"median":14.073671,"eighty":16.170099,"marketCap":3419205734},{"date":"2025-02-21","current":12.109784,"twenty":11.021479,"median":14.021414,"eighty":16.11969,"marketCap":3404157292},{"date":"2025-02-28","current":12.538642,"twenty":11.021479,"median":13.97302,"eighty":16.08076,"marketCap":3524712682},{"date":"2025-03-07","current":12.087978,"twenty":11.021241,"median":13.93922,"eighty":15.987533,"marketCap":3398027357},{"date":"2025-03-14","current":12.269698,"twenty":11.021241,"median":13.923087,"eighty":15.973541,"marketCap":3449110149},{"date":"2025-03-21","current":12.189741,"twenty":11.030709,"median":13.923087,"eighty":15.973541,"marketCap":3426633720},{"date":"2025-03-28","current":12.102516,"twenty":11.03705,"median":13.923087,"eighty":15.973541,"marketCap":3402113980},{"date":"2025-04-04","current":11.637314,"twenty":11.03705,"median":13.923087,"eighty":15.973541,"marketCap":3271342031},{"date":"2025-04-11","current":11.993484,"twenty":11.037249,"median":13.919535,"eighty":15.970298,"marketCap":3371464305},{"date":"2025-04-17","current":12.189741,"twenty":11.037249,"median":13.913614,"eighty":15.970298,"marketCap":3426633720},{"date":"2025-04-25","current":12.262429,"twenty":11.03705,"median":13.913614,"eighty":15.973541,"marketCap":3447066837},{"date":"2025-05-02","current":12.734899,"twenty":11.03705,"median":13.913614,"eighty":15.973541,"marketCap":3579882098},{"date":"2025-05-09","current":13.537646,"twenty":11.03705,"median":13.913614,"eighty":15.973541,"marketCap":3549232422},{"date":"2025-05-16","current":13.576615,"twenty":11.03705,"median":13.913614,"eighty":15.973541,"marketCap":3559448981},{"date":"2025-05-23","current":13.163549,"twenty":11.03705,"median":13.913614,"eighty":15.973541,"marketCap":3451153461},{"date":"2025-05-30","current":13.350598,"twenty":11.03705,"median":13.903056,"eighty":15.973541,"marketCap":3500192942},{"date":"2025-06-06","current":13.085612,"twenty":11.03705,"median":13.869879,"eighty":15.973541,"marketCap":3430720344},{"date":"2025-06-13","current":12.9765,"twenty":11.03705,"median":13.859602,"eighty":15.973541,"marketCap":3402113980},{"date":"2025-06-20","current":12.579022,"twenty":11.03685,"median":13.862512,"eighty":15.976785,"marketCap":3297905083},{"date":"2025-06-27","current":12.758277,"twenty":11.03685,"median":13.862512,"eighty":15.976785,"marketCap":3344901252},{"date":"2025-07-03","current":13.101199,"twenty":11.03685,"median":13.850486,"eighty":15.976785,"marketCap":3434806967},{"date":"2025-07-11","current":12.937532,"twenty":11.03685,"median":13.846204,"eighty":15.976785,"marketCap":3391897422},{"date":"2025-07-18","current":13.241486,"twenty":11.03685,"median":13.846204,"eighty":15.976785,"marketCap":3471586578},{"date":"2025-07-25","current":13.140168,"twenty":11.03685,"median":13.845857,"eighty":15.976785,"marketCap":3445023526},{"date":"2025-08-01","current":13.444122,"twenty":11.03685,"median":13.842758,"eighty":15.976785,"marketCap":3524712682},{"date":"2025-08-08","current":15.472811,"twenty":11.03685,"median":13.845857,"eighty":15.976785,"marketCap":3334684694},{"date":"2025-08-15","current":15.766718,"twenty":11.03685,"median":13.865964,"eighty":15.983374,"marketCap":3398027357},{"date":"2025-08-22","current":15.501253,"twenty":11.03685,"median":13.91112,"eighty":15.983374,"marketCap":3340814629},{"date":"2025-08-29","current":15.56762,"twenty":11.03685,"median":13.933842,"eighty":15.983374,"marketCap":3355117811},{"date":"2025-09-05","current":15.396964,"twenty":11.036651,"median":13.962195,"eighty":15.983409,"marketCap":3318338200},{"date":"2025-09-12","current":15.548658,"twenty":11.03685,"median":14.028672,"eighty":15.983374,"marketCap":3351031188},{"date":"2025-09-19","current":15.25475,"twenty":11.03685,"median":14.099463,"eighty":15.983374,"marketCap":3287688525},{"date":"2025-09-26","current":16.174397,"twenty":11.03685,"median":14.13282,"eighty":16.042996,"marketCap":3485889760},{"date":"2025-10-03","current":16.762212,"twenty":11.03685,"median":14.16848,"eighty":16.083072,"marketCap":3612575085},{"date":"2025-10-10","current":17.748224,"twenty":11.03685,"median":14.221531,"eighty":16.132891,"marketCap":3825079502},{"date":"2025-10-17","current":18.013689,"twenty":11.03685,"median":14.241902,"eighty":16.17441,"marketCap":3882292230},{"date":"2025-10-24","current":18.658389,"twenty":11.03685,"median":14.272386,"eighty":16.194944,"marketCap":4021237425},{"date":"2025-10-31","current":18.430848,"twenty":11.03685,"median":14.299532,"eighty":16.236344,"marketCap":3972197944},{"date":"2025-11-07","current":24.885467,"twenty":11.03685,"median":14.340993,"eighty":16.265032,"marketCap":4213308725},{"date":"2025-11-14","current":24.899292,"twenty":11.03685,"median":14.366256,"eighty":16.281551,"marketCap":4213308725},{"date":"2025-11-21","current":24.730237,"twenty":11.03685,"median":14.389437,"eighty":16.327227,"marketCap":4184702361},{"date":"2025-11-28","current":25.551358,"twenty":11.03685,"median":14.405069,"eighty":16.367814,"marketCap":4323647557},{"date":"2025-12-05","current":23.504495,"twenty":11.03685,"median":14.414556,"eighty":16.396385,"marketCap":3977289696},{"date":"2025-12-12","current":23.721906,"twenty":11.03685,"median":14.440297,"eighty":16.45552,"marketCap":4014078604},{"date":"2025-12-19","current":23.154223,"twenty":11.03685,"median":14.453457,"eighty":16.483821,"marketCap":3918018678},{"date":"2025-12-26","current":23.721906,"twenty":11.03685,"median":14.471355,"eighty":16.519164,"marketCap":4014078604},{"date":"2026-01-02","current":23.576966,"twenty":11.03685,"median":14.497139,"eighty":16.537526,"marketCap":3989552665},{"date":"2026-01-09","current":24.253354,"twenty":11.03685,"median":14.51279,"eighty":16.579113,"marketCap":4104007045},{"date":"2026-01-16","current":24.664018,"twenty":11.03685,"median":14.51279,"eighty":16.624168,"marketCap":4173497204},{"date":"2026-01-23","current":24.965977,"twenty":11.03685,"median":14.51279,"eighty":16.661579,"marketCap":4224592910},{"date":"2026-01-30","current":24.79688,"twenty":11.03685,"median":14.529087,"eighty":16.771702,"marketCap":4195979315},{"date":"2026-02-06","current":21.640534,"twenty":11.03685,"median":14.550732,"eighty":16.861868,"marketCap":4120357671},{"date":"2026-02-13","current":22.338269,"twenty":11.03685,"median":14.583531,"eighty":16.941445,"marketCap":4253206505},{"date":"2026-02-20","current":21.737144,"twenty":11.03685,"median":14.600898,"eighty":17.025607,"marketCap":4138752125},{"date":"2026-02-27","current":21.941673,"twenty":11.03685,"median":14.608517,"eighty":17.07025,"marketCap":4177584861},{"date":"2026-03-06","current":22.821916,"twenty":11.03685,"median":14.608517,"eighty":17.172395,"marketCap":4345178774},{"date":"2026-03-13","current":22.435468,"twenty":11.03685,"median":14.608517,"eighty":17.214861,"marketCap":4271600958},{"date":"2026-03-18","current":21.898734,"twenty":11.03685,"median":14.608517,"eighty":17.225409,"marketCap":4169409548}],"updateTime":1773953402997},"$inf$@#url:\"https://stock-news.skytigris.cn/v3/notice/important/events/list\",params:#symbol:\"MDU\",pageSize:20,pageCount:7,market:\"us\",,,undefined,":[{"items":[{"cdn_pdf":false,"hasAttachments":false,"id":"11778789","market":"us","labels":[],"media":"sec.gov","original_id":"AN9375121000150-MDU","pdf_url":null,"pub_time":1612800000000,"showTitleType":true,"size":0,"source":"sec_us","summary":"SC 13G  - Statement of acquisition of beneficial ownership by individuals","symbol":"MDU","title":"SC 13G  - Statement of acquisition of beneficial ownership by individuals","titleType":"Beneficial Ownership Change","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000009375121000150/0000093751-21-000150-index.htm","us_notice_code":"Form SC 13G","us_title_en":"SC 13G  - Statement of acquisition of beneficial ownership by individuals","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Beneficial Ownership Change","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Beneficial Ownership Change","pubTime":"2021-02-09 00:00","pubTimestamp":1612800000,"title_zh":"SC 13G  - Statement of acquisition of beneficial ownership by individuals","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"11778792","market":"us","labels":[],"media":"sec.gov","original_id":"AN6771621000003-MDU","pdf_url":null,"pub_time":1612281600000,"showTitleType":true,"size":0,"source":"sec_us","summary":"8-K  - Current report","symbol":"MDU","title":"8-K  - Current report","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000006771621000003/0000067716-21-000003-index.htm","us_notice_code":"Form 8-K","us_title_en":"Item 2.02: Results of Operations and Financial Condition;\nItem 7.01: Regulation FD Disclosure","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"MDU RESOURCES GROUP, INC. EX 99","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771621000003/a2020earningsreleaseex-99.htm","primary":true,"translateUrl":null,"linkName":"a2020earningsreleaseex-99.htm","type":"EX-99","id":"NTFILEAKxd6Md7VUS2imgx","market":"us","size":587325},{"description":"MDU RESOURCES GROUP, INC. FORM 8-K","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771621000003/mdu-20210203.htm","primary":false,"translateUrl":null,"linkName":"mdu-20210203.htm","type":"8-K","id":"NTFILEBSzyxrHQyupnJGHx","market":"us","size":31319},{"description":"MDU RESOURCES GROUP, INC. LOGO","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771621000003/mdurirpressreleasebasa171.jpg","primary":false,"translateUrl":null,"linkName":"mdurirpressreleasebasa171.jpg","type":"GRAPHIC","id":"NTFILE9VmVC2B5RK3uBtSe","market":"us","size":748436}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Major Issues Report","pubTime":"2021-02-03 00:00","pubTimestamp":1612281600,"title_zh":"8-K  - Current report","summary_en":"Item 2.02: Results of Operations and Financial Condition;\nItem 7.01: Regulation FD Disclosure","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":false,"id":"11778788","market":"us","labels":[],"media":"sec.gov","original_id":"AN83423721004655-MDU","pdf_url":null,"pub_time":1611849600000,"showTitleType":true,"size":0,"source":"sec_us","summary":"SC 13G/A [Amend]  - Statement of acquisition of beneficial ownership by individuals","symbol":"MDU","title":"SC 13G/A [Amend]  - Statement of acquisition of beneficial ownership by individuals","titleType":"Beneficial Ownership Change","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000083423721004655/0000834237-21-004655-index.htm","us_notice_code":"Form SC 13G/A","us_title_en":"SC 13G/A [Amend]  - Statement of acquisition of beneficial ownership by individuals","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Beneficial Ownership Change","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Beneficial Ownership Change","pubTime":"2021-01-29 00:00","pubTimestamp":1611849600,"title_zh":"SC 13G/A [Amend]  - Statement of acquisition of beneficial ownership by individuals","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"11206977","market":"us","labels":[],"media":"sec.gov","original_id":"AN6771620000066-MDU","pdf_url":null,"pub_time":1608220800000,"showTitleType":true,"size":0,"source":"sec_us","summary":"8-K  - Current report","symbol":"MDU","title":"8-K  - Current report","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000066/0000067716-20-000066-index.htm","us_notice_code":"Form 8-K","us_title_en":"Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers;\nItem 9.01: Financial Statements and Exhibits","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"8-K","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000066/mdu-20201215.htm","primary":true,"translateUrl":null,"linkName":"mdu-20201215.htm","type":"8-K","id":"NTFILE2R5xB2iAEC6WhXAE","market":"us","size":33742}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Major Issues Report","pubTime":"2020-12-18 00:00","pubTimestamp":1608220800,"title_zh":"8-K  - Current report","summary_en":"Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers;\nItem 9.01: Financial Statements and Exhibits","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"11149668","market":"us","labels":[],"media":"sec.gov","original_id":"AN6771620000063-MDU","pdf_url":null,"pub_time":1607875200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"8-K  - Current report","symbol":"MDU","title":"8-K  - Current report","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000063/0000067716-20-000063-index.htm","us_notice_code":"Form 8-K","us_title_en":"Item 7.01: Regulation FD Disclosure;\nItem 9.01: Financial Statements and Exhibits","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"MDU RESOURCES EX 99 EARNINGS GUIDANCE","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000063/a2020ex99-earningsguid.htm","primary":true,"translateUrl":null,"linkName":"a2020ex99-earningsguid.htm","type":"EX-99","id":"NTFILE4Q8VnN65qBtnETJm","market":"us","size":7137},{"description":"MDU RESOURCES FORM 8-K EARNINGS GUIDANCE","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000063/mdu-20201214.htm","primary":false,"translateUrl":null,"linkName":"mdu-20201214.htm","type":"8-K","id":"NTFILEzHUzT2XrJntsq6cp","market":"us","size":32452},{"description":"","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000063/mdurirpressreleasebasa071a.jpg","primary":false,"translateUrl":null,"linkName":"mdurirpressreleasebasa071a.jpg","type":"GRAPHIC","id":"NTFILE4aeY4Kkz6e5pLU1o","market":"us","size":748436}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Major Issues Report","pubTime":"2020-12-14 00:00","pubTimestamp":1607875200,"title_zh":"8-K  - Current report","summary_en":"Item 7.01: Regulation FD Disclosure;\nItem 9.01: Financial Statements and Exhibits","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"10898253","market":"us","labels":[],"media":"sec.gov","original_id":"AN6771620000060-MDU","pdf_url":null,"pub_time":1605715200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"8-K  - Current report","symbol":"MDU","title":"8-K  - Current report","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000060/0000067716-20-000060-index.htm","us_notice_code":"Form 8-K","us_title_en":"Item 7.01: Regulation FD Disclosure;\nItem 9.01: Financial Statements and Exhibits","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"MDU RESOURCES EXHIBIT 99 CAP EX","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000060/a2020ex99-capexforecast.htm","primary":true,"translateUrl":null,"linkName":"a2020ex99-capexforecast.htm","type":"EX-99","id":"NTFILEBykjjgTWFJnYp1hi","market":"us","size":38380},{"description":"MDU RESOURCES FORM 8-K CAP EX","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000060/mdu-20201119.htm","primary":false,"translateUrl":null,"linkName":"mdu-20201119.htm","type":"8-K","id":"NTFILE9bMAjfo6CBhjECSe","market":"us","size":32297},{"description":"","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000060/mdurirpressreleasebasa181a.jpg","primary":false,"translateUrl":null,"linkName":"mdurirpressreleasebasa181a.jpg","type":"GRAPHIC","id":"NTFILE6SpnsGhLvPsNYLYA","market":"us","size":748436}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Major Issues Report","pubTime":"2020-11-19 00:00","pubTimestamp":1605715200,"title_zh":"8-K  - Current report","summary_en":"Item 7.01: Regulation FD Disclosure;\nItem 9.01: Financial Statements and Exhibits","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"10820359","market":"us","labels":[],"media":"sec.gov","original_id":"AN6771620000056-MDU","pdf_url":null,"pub_time":1605110400000,"showTitleType":true,"size":0,"source":"sec_us","summary":"8-K  - Current report","symbol":"MDU","title":"8-K  - Current report","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000056/0000067716-20-000056-index.htm","us_notice_code":"Form 8-K","us_title_en":"Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers;\nItem 9.01: Financial Statements and Exhibits","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"EX-10.1","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000056/ex101deferredcompplana.htm","primary":true,"translateUrl":null,"linkName":"ex101deferredcompplana.htm","type":"EX-10.1","id":"NTFILEAzNxX1tdmuJmMaco","market":"us","size":108367},{"description":"8-K","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000056/mdu-20201112.htm","primary":false,"translateUrl":null,"linkName":"mdu-20201112.htm","type":"8-K","id":"NTFILE9EgJJC3CH33rahue","market":"us","size":37574},{"description":"EX-10.2","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000056/ex102deferredcompplan.htm","primary":false,"translateUrl":null,"linkName":"ex102deferredcompplan.htm","type":"EX-10.2","id":"NTFILEHoe1fqagjRJpWV1k","market":"us","size":145699}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Major Issues Report","pubTime":"2020-11-12 00:00","pubTimestamp":1605110400,"title_zh":"8-K  - Current report","summary_en":"Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers;\nItem 9.01: Financial Statements and Exhibits","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"10740128","market":"us","labels":[],"media":"sec.gov","original_id":"AN6771620000053-MDU","pdf_url":null,"pub_time":1604505600000,"showTitleType":true,"size":0,"source":"sec_us","summary":"10-Q  - Quarterly report [Sections 13 or 15(d)]","symbol":"MDU","title":"10-Q  - Quarterly report [Sections 13 or 15(d)]","titleType":"Quarterly Report","type":"usFinancials","url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000053/0000067716-20-000053-index.htm","us_notice_code":"Form 10-Q","us_title_en":"10-Q  - Quarterly report [Sections 13 or 15(d)]","is_important":0,"hasEarnInfos":true,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"MDU RESOURCES FORM 10-Q 9-30-2020","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000053/mdu-20200930.htm","primary":true,"translateUrl":null,"linkName":"mdu-20200930.htm","type":"10-Q","id":"NTFILE8dTte9wQbavfwC8j","market":"us","size":3198782},{"description":"MDU RESOURCES CERTIFICATION OF CHIEF EXECUTIVE OFFICER","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000053/a2020q3ex31a.htm","primary":false,"translateUrl":null,"linkName":"a2020q3ex31a.htm","type":"EX-31.A","id":"NTFILE3UcAATZDM771VDFK","market":"us","size":9316},{"description":"MDU RESOURCES CERTIFICATION OF CHIEF FINANCIAL OFFICER","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000053/a2020q3ex31b.htm","primary":false,"translateUrl":null,"linkName":"a2020q3ex31b.htm","type":"EX-31.B","id":"NTFILEFgMkQKoxHGVmrAzC","market":"us","size":8940},{"description":"MDU RESOURCES CERTIFICATION OF CEO AND CFO","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000053/a2020q3ex32.htm","primary":false,"translateUrl":null,"linkName":"a2020q3ex32.htm","type":"EX-32","id":"NTFILE8HofZtBJc1ASPagw","market":"us","size":5476},{"description":"MDU RESOURCES MINE SAFETY DISCLOSURES","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000053/a2020q3ex95.htm","primary":false,"translateUrl":null,"linkName":"a2020q3ex95.htm","type":"EX-95","id":"NTFILE3qvTLBHyDUfL8G8D","market":"us","size":143438}],"type_name":"Financial Report","type_name_en":"Financial Report","titleTypeEn":"Quarterly Report","us_type":"财务报告","us_type_zh":"财务报告","earn_infos":[{"id":48870,"name":"Consolidated Statements of Income","name_zh":null,"url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000053/R2.htm","cdn_url":"","translation_url":"","translate_status":0},{"id":48871,"name":"Consolidated Statements of Comprehensive Income","name_zh":null,"url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000053/R3.htm","cdn_url":"","translation_url":"","translate_status":0},{"id":48872,"name":"Consolidated Balance Sheets","name_zh":null,"url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000053/R4.htm","cdn_url":"","translation_url":"","translate_status":0},{"id":48873,"name":"Consolidated Statements of Equity","name_zh":null,"url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000053/R5.htm","cdn_url":"","translation_url":"","translate_status":0},{"id":48874,"name":"Consolidated Statements of Cash Flows","name_zh":"合并现金流量表","url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000053/R6.htm","cdn_url":"https://static.tigerbbs.com/73dd72a320eb1be259fef2067ec5d353","translation_url":"https://static.tigerbbs.com/d946f7a76d906f1dd9282dc87a60d3b6","translate_status":1}],"event_type":"important_notice","event_name":"Quarterly Report","pubTime":"2020-11-05 00:00","pubTimestamp":1604505600,"title_zh":"10-Q  - Quarterly report [Sections 13 or 15(d","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"10725301","market":"us","labels":[],"media":"sec.gov","original_id":"AN6771620000051-MDU","pdf_url":null,"pub_time":1604419200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"8-K  - Current report","symbol":"MDU","title":"8-K  - Current report","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000051/0000067716-20-000051-index.htm","us_notice_code":"Form 8-K","us_title_en":"Item 2.02: Results of Operations and Financial Condition;\nItem 7.01: Regulation FD Disclosure;\nItem 9.01: Financial Statements and Exhibits","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"MDU RESOURCES GROUP, INC. EX 99","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000051/a2020q3ex99.htm","primary":true,"translateUrl":null,"linkName":"a2020q3ex99.htm","type":"EX-99","id":"NTFILEAVNE5vwd6HGLurqx","market":"us","size":476394},{"description":"MDU RESOURCES GROUP, INC. FORM 8-K","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000051/mdu-20201104.htm","primary":false,"translateUrl":null,"linkName":"mdu-20201104.htm","type":"8-K","id":"NTFILE5hqbSvfUYR228ik9","market":"us","size":32421},{"description":"MDU RESOURCES GROUP, INC. LOGO","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000051/mdurirpressreleasebasa181a.jpg","primary":false,"translateUrl":null,"linkName":"mdurirpressreleasebasa181a.jpg","type":"GRAPHIC","id":"NTFILE8JUR6AuPWvF6yrAH","market":"us","size":748436}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Major Issues Report","pubTime":"2020-11-04 00:00","pubTimestamp":1604419200,"title_zh":"8-K  - Current report","summary_en":"Item 2.02: Results of Operations and Financial Condition;\nItem 7.01: Regulation FD Disclosure;\nItem 9.01: Financial Statements and Exhibits","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"10439970","market":"us","labels":[],"media":"sec.gov","original_id":"AN6771620000047-MDU","pdf_url":null,"pub_time":1602086400000,"showTitleType":true,"size":0,"source":"sec_us","summary":"8-K  - Current report","symbol":"MDU","title":"8-K  - Current report","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000047/0000067716-20-000047-index.htm","us_notice_code":"Form 8-K","us_title_en":"Item 1.04: Mine Safety - Reporting of Shutdowns and Patterns of Violations;\nItem 9.01: Financial Statements and Exhibits","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000047/mdu-20200916.xsd","primary":true,"translateUrl":null,"linkName":"mdu-20200916.xsd","type":"EX-101.SCH","id":"NTFILE5QQAvNX1X1YqhdGD","market":"us","size":4424},{"description":"8-K","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000047/a2020form8-k104krcidaho.htm","primary":false,"translateUrl":null,"linkName":"a2020form8-k104krcidaho.htm","type":"8-K","id":"NTFILE9QLQaQevNPeCKHVU","market":"us","size":42551},{"description":"XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000047/mdu-20200916_cal.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200916_cal.xml","type":"EX-101.CAL","id":"NTFILEuKoNEsTZVtG9RHHw","market":"us","size":609},{"description":"XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000047/mdu-20200916_def.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200916_def.xml","type":"EX-101.DEF","id":"NTFILE7QDsTwuUziuJuQPL","market":"us","size":14527},{"description":"XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000047/mdu-20200916_lab.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200916_lab.xml","type":"EX-101.LAB","id":"NTFILECBKNofofiHPUeJPK","market":"us","size":31386},{"description":"XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT","seq":6,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000047/mdu-20200916_pre.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200916_pre.xml","type":"EX-101.PRE","id":"NTFILE414CPmNxoNEdpXyx","market":"us","size":16430},{"description":"EXTRACTED XBRL INSTANCE DOCUMENT","seq":7,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000047/a2020form8-k104krcidaho_htm.xml","primary":false,"translateUrl":null,"linkName":"a2020form8-k104krcidaho_htm.xml","type":"XML","id":"NTFILEG3rsqzv5amz1bboS","market":"us","size":4539}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Major Issues Report","pubTime":"2020-10-08 00:00","pubTimestamp":1602086400,"title_zh":"8-K  - Current report","summary_en":"Item 1.04: Mine Safety - Reporting of Shutdowns and Patterns of Violations;\nItem 9.01: Financial Statements and Exhibits","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"10231821","market":"us","labels":[],"media":"sec.gov","original_id":"AN6771620000044-MDU","pdf_url":null,"pub_time":1596643200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"10-Q  - Quarterly report [Sections 13 or 15(d)]","symbol":"MDU","title":"10-Q  - Quarterly report [Sections 13 or 15(d)]","titleType":"Quarterly Report","type":"usFinancials","url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/0000067716-20-000044-index.htm","us_notice_code":"Form 10-Q","us_title_en":"10-Q  - Quarterly report [Sections 13 or 15(d)]","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"MDU RESOURCES FORM 10-Q 06-30-2020","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/mdu-20200630.htm","primary":true,"translateUrl":null,"linkName":"mdu-20200630.htm","type":"10-Q","id":"NTFILE4QB6q8AockXzwaxm","market":"us","size":3893562},{"description":"MDU RESOURCES CERTIFICATION OF CHIEF EXECUTIVE OFFICER","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/a2020q2ex31a.htm","primary":false,"translateUrl":null,"linkName":"a2020q2ex31a.htm","type":"EX-31.A","id":"NTFILEEFRLnngrgVx9j9rh","market":"us","size":10571},{"description":"MDU RESOURCES CERTIFICATION OF CHIEF FINANCIAL OFFICER","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/a2020q2ex31b.htm","primary":false,"translateUrl":null,"linkName":"a2020q2ex31b.htm","type":"EX-31.B","id":"NTFILEHUj3EsD5oYQ1cR7N","market":"us","size":10154},{"description":"MDU RESOURCES CERTIFICATION OF CEO AND CFO","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/a2020q2ex32.htm","primary":false,"translateUrl":null,"linkName":"a2020q2ex32.htm","type":"EX-32","id":"NTFILEGazMsw1RcuRZTgFb","market":"us","size":6224},{"description":"MDU RESOURCES MINE SAFETY DISCLOSURES","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/a2020q2ex95.htm","primary":false,"translateUrl":null,"linkName":"a2020q2ex95.htm","type":"EX-95","id":"NTFILE2j7h1a33VevZ3ABb","market":"us","size":186864},{"description":"XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT","seq":6,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/mdu-20200630.xsd","primary":false,"translateUrl":null,"linkName":"mdu-20200630.xsd","type":"EX-101.SCH","id":"NTFILEARXkG85KYcAeMvBu","market":"us","size":53687},{"description":"XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT","seq":7,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/mdu-20200630_cal.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200630_cal.xml","type":"EX-101.CAL","id":"NTFILEEgBfkNMTenzQkehb","market":"us","size":100599},{"description":"XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT","seq":8,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/mdu-20200630_def.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200630_def.xml","type":"EX-101.DEF","id":"NTFILECxcPyogsTsdN7Uzp","market":"us","size":413795},{"description":"XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT","seq":9,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/mdu-20200630_lab.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200630_lab.xml","type":"EX-101.LAB","id":"NTFILEBgnmHBnRMbRbvu5B","market":"us","size":726716},{"description":"XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT","seq":10,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/mdu-20200630_pre.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200630_pre.xml","type":"EX-101.PRE","id":"NTFILE1QZ9CvHJtXdJ2NNj","market":"us","size":500519},{"description":"EXTRACTED XBRL INSTANCE DOCUMENT","seq":11,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/mdu-20200630_htm.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200630_htm.xml","type":"XML","id":"NTFILECjxGpBKGQHtfm2iH","market":"us","size":3973077}],"type_name":"Financial Report","type_name_en":"Financial Report","titleTypeEn":"Quarterly Report","us_type":"财务报告","us_type_zh":"财务报告","earn_infos":[],"event_type":"important_notice","event_name":"Quarterly Report","pubTime":"2020-08-06 00:00","pubTimestamp":1596643200,"title_zh":"10-Q  - Quarterly report [Sections 13 or 15(d","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"10231820","market":"us","labels":[],"media":"sec.gov","original_id":"AN6771620000044-MDU","pdf_url":null,"pub_time":1596643200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"10-Q  - Quarterly report [Sections 13 or 15(d)]","symbol":"MDU","title":"10-Q  - Quarterly report [Sections 13 or 15(d)]","titleType":"Quarterly Report","type":"usFinancials","url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/0000067716-20-000044-index.htm","us_notice_code":"Form 10-Q","us_title_en":"10-Q  - Quarterly report [Sections 13 or 15(d)]","is_important":0,"hasEarnInfos":true,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"MDU RESOURCES FORM 10-Q 06-30-2020","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/mdu-20200630.htm","primary":true,"translateUrl":null,"linkName":"mdu-20200630.htm","type":"10-Q","id":"NTFILE4QB6q8AockXzwaxm","market":"us","size":3893562},{"description":"MDU RESOURCES CERTIFICATION OF CHIEF EXECUTIVE OFFICER","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/a2020q2ex31a.htm","primary":false,"translateUrl":null,"linkName":"a2020q2ex31a.htm","type":"EX-31.A","id":"NTFILEEFRLnngrgVx9j9rh","market":"us","size":10571},{"description":"MDU RESOURCES CERTIFICATION OF CHIEF FINANCIAL OFFICER","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/a2020q2ex31b.htm","primary":false,"translateUrl":null,"linkName":"a2020q2ex31b.htm","type":"EX-31.B","id":"NTFILEHUj3EsD5oYQ1cR7N","market":"us","size":10154},{"description":"MDU RESOURCES CERTIFICATION OF CEO AND CFO","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/a2020q2ex32.htm","primary":false,"translateUrl":null,"linkName":"a2020q2ex32.htm","type":"EX-32","id":"NTFILEGazMsw1RcuRZTgFb","market":"us","size":6224},{"description":"MDU RESOURCES MINE SAFETY DISCLOSURES","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/a2020q2ex95.htm","primary":false,"translateUrl":null,"linkName":"a2020q2ex95.htm","type":"EX-95","id":"NTFILE2j7h1a33VevZ3ABb","market":"us","size":186864},{"description":"XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT","seq":6,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/mdu-20200630.xsd","primary":false,"translateUrl":null,"linkName":"mdu-20200630.xsd","type":"EX-101.SCH","id":"NTFILEARXkG85KYcAeMvBu","market":"us","size":53687},{"description":"XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT","seq":7,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/mdu-20200630_cal.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200630_cal.xml","type":"EX-101.CAL","id":"NTFILEEgBfkNMTenzQkehb","market":"us","size":100599},{"description":"XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT","seq":8,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/mdu-20200630_def.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200630_def.xml","type":"EX-101.DEF","id":"NTFILECxcPyogsTsdN7Uzp","market":"us","size":413795},{"description":"XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT","seq":9,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/mdu-20200630_lab.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200630_lab.xml","type":"EX-101.LAB","id":"NTFILEBgnmHBnRMbRbvu5B","market":"us","size":726716},{"description":"XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT","seq":10,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/mdu-20200630_pre.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200630_pre.xml","type":"EX-101.PRE","id":"NTFILE1QZ9CvHJtXdJ2NNj","market":"us","size":500519},{"description":"EXTRACTED XBRL INSTANCE DOCUMENT","seq":11,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/mdu-20200630_htm.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200630_htm.xml","type":"XML","id":"NTFILECjxGpBKGQHtfm2iH","market":"us","size":3973077}],"type_name":"Financial Report","type_name_en":"Financial Report","titleTypeEn":"Quarterly Report","us_type":"财务报告","us_type_zh":"财务报告","earn_infos":[{"id":22033,"name":"Consolidated Statements of Income","name_zh":null,"url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/R2.htm","cdn_url":"","translation_url":"","translate_status":0},{"id":22034,"name":"Consolidated Statements of Comprehensive Income","name_zh":null,"url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/R3.htm","cdn_url":"","translation_url":"","translate_status":0},{"id":22035,"name":"Consolidated Balance Sheets","name_zh":null,"url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/R4.htm","cdn_url":"","translation_url":"","translate_status":0},{"id":22036,"name":"Consolidated Statements of Equity","name_zh":null,"url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/R5.htm","cdn_url":"","translation_url":"","translate_status":0},{"id":22037,"name":"Consolidated Statements of Cash Flows","name_zh":null,"url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/R6.htm","cdn_url":"","translation_url":"","translate_status":0},{"id":22038,"name":"Consolidated Statements of Income","name_zh":null,"url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/R2.htm","cdn_url":"","translation_url":"","translate_status":0},{"id":22039,"name":"Consolidated Statements of Comprehensive Income","name_zh":null,"url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/R3.htm","cdn_url":"","translation_url":"","translate_status":0},{"id":22040,"name":"Consolidated Balance Sheets","name_zh":null,"url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/R4.htm","cdn_url":"","translation_url":"","translate_status":0},{"id":22041,"name":"Consolidated Statements of Equity","name_zh":null,"url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/R5.htm","cdn_url":"","translation_url":"","translate_status":0},{"id":22042,"name":"Consolidated Statements of Cash Flows","name_zh":"合并现金流量表","url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000044/R6.htm","cdn_url":"https://static.tigerbbs.com/4755bb0ad640cf9259b990bb4af027b1","translation_url":"https://static.tigerbbs.com/a525b937d125a28553d44215eba5bcba","translate_status":1}],"event_type":"important_notice","event_name":"Quarterly Report","pubTime":"2020-08-06 00:00","pubTimestamp":1596643200,"title_zh":"10-Q  - Quarterly report [Sections 13 or 15(d","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"10222137","market":"us","labels":[],"media":"sec.gov","original_id":"AN6771620000041-MDU","pdf_url":null,"pub_time":1596470400000,"showTitleType":true,"size":0,"source":"sec_us","summary":"8-K  - Current report","symbol":"MDU","title":"8-K  - Current report","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000041/0000067716-20-000041-index.htm","us_notice_code":"Form 8-K","us_title_en":"Item 2.02: Results of Operations and Financial Condition;\nItem 7.01: Regulation FD Disclosure;\nItem 9.01: Financial Statements and Exhibits","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"MDU RESOURCES GROUP, INC. EX 99","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000041/a2020q2ex99.htm","primary":true,"translateUrl":null,"linkName":"a2020q2ex99.htm","type":"EX-99","id":"NTFILE5CN8ba6YQBuFdTH9","market":"us","size":853583},{"description":"MDU RESOURCES GROUP, INC. FORM 8-K","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000041/mdu-20200804.htm","primary":false,"translateUrl":null,"linkName":"mdu-20200804.htm","type":"8-K","id":"NTFILECU7y9W9Lcs8AHZ7E","market":"us","size":38439},{"description":"XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000041/mdu-20200804.xsd","primary":false,"translateUrl":null,"linkName":"mdu-20200804.xsd","type":"EX-101.SCH","id":"NTFILEAEzbq9jsZ8guzY3h","market":"us","size":2416},{"description":"XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000041/mdu-20200804_cal.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200804_cal.xml","type":"EX-101.CAL","id":"NTFILE6A1yDom4t7dED7pr","market":"us","size":711},{"description":"XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000041/mdu-20200804_def.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200804_def.xml","type":"EX-101.DEF","id":"NTFILEHZdKzyNTuosRG2ud","market":"us","size":14946},{"description":"XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT","seq":6,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000041/mdu-20200804_lab.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200804_lab.xml","type":"EX-101.LAB","id":"NTFILEFp59Ju7amvoxDN8Q","market":"us","size":29024},{"description":"XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT","seq":7,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000041/mdu-20200804_pre.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200804_pre.xml","type":"EX-101.PRE","id":"NTFILE2w8ipBHPeaDeeAZx","market":"us","size":15562},{"description":"MDU RESOURCES GROUP, INC. LOGO","seq":8,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000041/mdurirpressreleasebasa.jpg","primary":false,"translateUrl":null,"linkName":"mdurirpressreleasebasa.jpg","type":"GRAPHIC","id":"NTFILE2BvYZqxGzp6S3LmR","market":"us","size":748436},{"description":"EXTRACTED XBRL INSTANCE DOCUMENT","seq":9,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000041/mdu-20200804_htm.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200804_htm.xml","type":"XML","id":"NTFILEYp8yWTFm4r8B43gh","market":"us","size":11192}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Major Issues Report","pubTime":"2020-08-04 00:00","pubTimestamp":1596470400,"title_zh":"8-K  - Current report","summary_en":"Item 2.02: Results of Operations and Financial Condition;\nItem 7.01: Regulation FD Disclosure;\nItem 9.01: Financial Statements and Exhibits","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"9868033","market":"us","labels":[],"media":"sec.gov","original_id":"AN6771620000036-MDU","pdf_url":null,"pub_time":1591891200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"11-K  - Annual report of employee stock purchase, savings and similar plans","symbol":"MDU","title":"11-K  - Annual report of employee stock purchase, savings and similar plans","titleType":"Employee Stock Ownership","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000036/0000067716-20-000036-index.htm","us_notice_code":"Form 11-K","us_title_en":"11-K  - Annual report of employee stock purchase, savings and similar plans","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"MDU RESOURCES FORM 11-K","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000036/a2019form11-k.htm","primary":true,"translateUrl":null,"linkName":"a2019form11-k.htm","type":"11-K","id":"NTFILE8AsAuzJQhXj7zoQ1","market":"us","size":274457},{"description":"CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000036/a2019form11-kex23.htm","primary":false,"translateUrl":null,"linkName":"a2019form11-kex23.htm","type":"EX-23","id":"NTFILE2DEzyzTAV3bU41i2","market":"us","size":2669}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Employee Stock Ownership","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Employee Stock Ownership","pubTime":"2020-06-12 00:00","pubTimestamp":1591891200,"title_zh":"11-K  - Annual report of employee stock purchase, savings and similar plans","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"9753284","market":"us","labels":[],"media":"sec.gov","original_id":"AN6771620000030-MDU","pdf_url":null,"pub_time":1589299200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"8-K  - Current report","symbol":"MDU","title":"8-K  - Current report","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000030/0000067716-20-000030-index.htm","us_notice_code":"Form 8-K","us_title_en":"Item 5.07: Submission of Matters to a Vote of Security Holders","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000030/mdu-20200512.xsd","primary":true,"translateUrl":null,"linkName":"mdu-20200512.xsd","type":"EX-101.SCH","id":"NTFILE3oPMi4tRV1p68mNr","market":"us","size":4424},{"description":"8-K","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000030/a20208-kstockholdersvo.htm","primary":false,"translateUrl":null,"linkName":"a20208-kstockholdersvo.htm","type":"8-K","id":"NTFILEGbJqGRjGSJXziAeP","market":"us","size":66031},{"description":"XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000030/mdu-20200512_cal.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200512_cal.xml","type":"EX-101.CAL","id":"NTFILEB4Ss4Fxz7YiKSBoo","market":"us","size":609},{"description":"XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000030/mdu-20200512_def.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200512_def.xml","type":"EX-101.DEF","id":"NTFILE9TBk4GHgQ41Uwt6S","market":"us","size":14527},{"description":"XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000030/mdu-20200512_lab.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200512_lab.xml","type":"EX-101.LAB","id":"NTFILEhtMUPMYcQxkadSD4","market":"us","size":31386},{"description":"XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT","seq":6,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000030/mdu-20200512_pre.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200512_pre.xml","type":"EX-101.PRE","id":"NTFILEFf3RrmZi9pqERrQY","market":"us","size":16430},{"description":"EXTRACTED XBRL INSTANCE DOCUMENT","seq":7,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000030/a20208-kstockholdersvo_htm.xml","primary":false,"translateUrl":null,"linkName":"a20208-kstockholdersvo_htm.xml","type":"XML","id":"NTFILE2X953yRUtLdKdmX4","market":"us","size":4467}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Major Issues Report","pubTime":"2020-05-13 00:00","pubTimestamp":1589299200,"title_zh":"8-K  - Current report","summary_en":"Item 5.07: Submission of Matters to a Vote of Security Holders","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"9695274","market":"us","labels":[],"media":"sec.gov","original_id":"AN6771620000027-MDU","pdf_url":null,"pub_time":1588867200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Quarterly report [Sections 13 or 15(d)]","symbol":"MDU","title":"Quarterly report [Sections 13 or 15(d)]","titleType":"Quarterly Report","type":"usFinancials","url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000027/0000067716-20-000027-index.htm","us_notice_code":"Form 10-Q","us_title_en":null,"is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"MDU RESOURCES FORM 10-Q 3-31-2020","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000027/a2020q1form10-q.htm","primary":true,"translateUrl":null,"linkName":"a2020q1form10-q.htm","type":"10-Q","id":"NTFILEBUz3RuZCaGmUyaw3","market":"us","size":2275522},{"description":"MDU RESOURCES 401 K RETIREMENT PLAN RESTATED 4-1-2020","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000027/a2020q1ex10a.htm","primary":false,"translateUrl":null,"linkName":"a2020q1ex10a.htm","type":"EX-10.A","id":"NTFILE2dUHL6i4io647yHf","market":"us","size":610369},{"description":"MDU RESOURCES CERTIFICATION OF CHIEF EXECUTIVE OFFICER","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000027/a2020q1ex31a.htm","primary":false,"translateUrl":null,"linkName":"a2020q1ex31a.htm","type":"EX-31.A","id":"NTFILE9wnQuUSZfEpn8ZHL","market":"us","size":9825},{"description":"MDU RESOURCES CERTIFICATION OF CHIEF FINANCIAL OFFICER","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000027/a2020q1ex31b.htm","primary":false,"translateUrl":null,"linkName":"a2020q1ex31b.htm","type":"EX-31.B","id":"NTFILE4rRTYjozwnKTGLWx","market":"us","size":9256},{"description":"MDU RESOURCES CERTIFICATION OF CEO AND CFO","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000027/a2020q1ex32.htm","primary":false,"translateUrl":null,"linkName":"a2020q1ex32.htm","type":"EX-32","id":"NTFILEi5bUTomBinymLnSr","market":"us","size":6882},{"description":"MDU RESOURCES MINE SAFETY DISCLOSURES","seq":6,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000027/a2020q1ex95.htm","primary":false,"translateUrl":null,"linkName":"a2020q1ex95.htm","type":"EX-95","id":"NTFILEBrqKS84HKQfN17ZS","market":"us","size":93211},{"description":"XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT","seq":7,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000027/mdu-20200331.xsd","primary":false,"translateUrl":null,"linkName":"mdu-20200331.xsd","type":"EX-101.SCH","id":"NTFILE2naZQwAoGaQ3cQMH","market":"us","size":55587},{"description":"XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT","seq":8,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000027/mdu-20200331_cal.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200331_cal.xml","type":"EX-101.CAL","id":"NTFILE3XqpJZBk18hHNWH2","market":"us","size":93618},{"description":"XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT","seq":9,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000027/mdu-20200331_def.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200331_def.xml","type":"EX-101.DEF","id":"NTFILE7hzcSrKTFHvWTfq1","market":"us","size":392852},{"description":"XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT","seq":10,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000027/mdu-20200331_lab.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200331_lab.xml","type":"EX-101.LAB","id":"NTFILEE2s6gR131khf6m5w","market":"us","size":805334},{"description":"XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT","seq":11,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000027/mdu-20200331_pre.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200331_pre.xml","type":"EX-101.PRE","id":"NTFILE37P9UJkJDwti87P8","market":"us","size":489735},{"description":"EXTRACTED XBRL INSTANCE DOCUMENT","seq":38,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000027/a2020q1form10-q_htm.xml","primary":false,"translateUrl":null,"linkName":"a2020q1form10-q_htm.xml","type":"XML","id":"NTFILEG1ySB2TpF2M4oLVT","market":"us","size":2427427}],"type_name":"Financial Report","type_name_en":"Financial Report","titleTypeEn":"Quarterly Report","us_type":"财务报告","us_type_zh":"财务报告","earn_infos":[],"event_type":"important_notice","event_name":"Quarterly Report","pubTime":"2020-05-08 00:00","pubTimestamp":1588867200,"title_zh":"Quarterly report [Sections 13 or 15(d","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"9691288","market":"us","labels":[],"media":"sec.gov","original_id":"AN6771620000025-MDU","pdf_url":null,"pub_time":1588780800000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Current report, items 2.02, 7.01, and 9.01","symbol":"MDU","title":"Current report, items 2.02, 7.01, and 9.01","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000025/0000067716-20-000025-index.htm","us_notice_code":"Form 8-K","us_title_en":null,"is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"MDU RESOURCES GROUP, INC. EX 99","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000025/a2020q1ex99.htm","primary":true,"translateUrl":null,"linkName":"a2020q1ex99.htm","type":"EX-99","id":"NTFILE4gVt6i8BjvwMZNdp","market":"us","size":426859},{"description":"MDU RESOURCES GROUP, INC. FORM 8-K","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000025/a2020q1form8-k.htm","primary":false,"translateUrl":null,"linkName":"a2020q1form8-k.htm","type":"8-K","id":"NTFILEE4cUv4jt7fzkx6cP","market":"us","size":38797},{"description":"XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000025/mdu-20200507.xsd","primary":false,"translateUrl":null,"linkName":"mdu-20200507.xsd","type":"EX-101.SCH","id":"NTFILECowH5gkQ1iGsS4af","market":"us","size":4424},{"description":"XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000025/mdu-20200507_cal.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200507_cal.xml","type":"EX-101.CAL","id":"NTFILE6B7pofKzFWMb8FGe","market":"us","size":609},{"description":"XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000025/mdu-20200507_def.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200507_def.xml","type":"EX-101.DEF","id":"NTFILE3uhJyrdsxZyw9c6U","market":"us","size":14527},{"description":"XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT","seq":6,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000025/mdu-20200507_lab.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200507_lab.xml","type":"EX-101.LAB","id":"NTFILE2EKr8tuL4r855SrG","market":"us","size":31386},{"description":"XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT","seq":7,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000025/mdu-20200507_pre.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200507_pre.xml","type":"EX-101.PRE","id":"NTFILEDAA7i97DQHCQrdUU","market":"us","size":16430},{"description":"MDU RESOURCES GROUP, INC. LOGO","seq":8,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000025/mdurirpressreleasebasa12.jpg","primary":false,"translateUrl":null,"linkName":"mdurirpressreleasebasa12.jpg","type":"GRAPHIC","id":"NTFILE6utJ9NZzda9V97j9","market":"us","size":748436},{"description":"EXTRACTED XBRL INSTANCE DOCUMENT","seq":12,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000025/a2020q1form8-k_htm.xml","primary":false,"translateUrl":null,"linkName":"a2020q1form8-k_htm.xml","type":"XML","id":"NTFILE7GMfJjc3grq6XBHm","market":"us","size":4464}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Major Issues Report","pubTime":"2020-05-07 00:00","pubTimestamp":1588780800,"title_zh":"Current report, items 2.02, 7.01, and 9.01","summary_en":"Item 2.02: Results of Operations and Financial Condition;\nItem 7.01: Regulation FD Disclosure;\nItem 9.01: Financial Statements and Exhibits","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"9120619","market":"us","labels":[],"media":"sec.gov","original_id":"AN6771620000010-MDU","pdf_url":null,"pub_time":1582214400000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Annual report [Section 13 and 15(d), not S-K Item 405]","symbol":"MDU","title":"Annual report [Section 13 and 15(d), not S-K Item 405]","titleType":"Annual Report","type":"usFinancials","url":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000010/0000067716-20-000010-index.htm","us_notice_code":"Form 10-K","us_title_en":"Annual report [Section 13 and 15(d), not S-K Item 405]","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"10-K","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000010/a2019form10-k.htm","primary":true,"translateUrl":null,"linkName":"a2019form10-k.htm","type":"10-K","id":"NTFILE3QWmp7cTtPniw8ec","market":"us","size":6061047},{"description":"MDU RESOURCES CEHI FIFTH AMENDED AND RESTATED CREDIT AGREEMENT 12-19-2019","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000010/a2019ex4c.htm","primary":false,"translateUrl":null,"linkName":"a2019ex4c.htm","type":"EX-4.C","id":"NTFILE8o1YZYwyVdzcfKhk","market":"us","size":871800},{"description":"MDU RESOURCES MDU AMENDED AND RESTATED CREDIT AGREEMENT 12-19-2019","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000010/a2019ex4d.htm","primary":false,"translateUrl":null,"linkName":"a2019ex4d.htm","type":"EX-4.D","id":"NTFILE84WtRtewvYQRoge4","market":"us","size":810398},{"description":"MDU RESOURCES DESCRIPTION OF SECURITIES","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000010/a2019ex4g.htm","primary":false,"translateUrl":null,"linkName":"a2019ex4g.htm","type":"EX-4.G","id":"NTFILEDgQhY2fN9TFnhTfB","market":"us","size":26090},{"description":"MDU RESOURCES EXECUTIVE INCENTIVE COMPENSATION PLAN AMENDED 11-13-2019","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000010/a2019ex10g.htm","primary":false,"translateUrl":null,"linkName":"a2019ex10g.htm","type":"EX-10.G","id":"NTFILEF9DHDu7ueDJbEMqp","market":"us","size":76111},{"description":"MDU RESOURCES LONG-TERM PERFORMANCE INCENTIVE PLAN","seq":6,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000010/a2019ex10k.htm","primary":false,"translateUrl":null,"linkName":"a2019ex10k.htm","type":"EX-10.K","id":"NTFILE3cPRAyXNUgnsrMR6","market":"us","size":71226},{"description":"MDU RESOURCES 401 K RETIREMENT PLAN AMENDMENT 10-15-2019","seq":7,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000010/a2019ex10y.htm","primary":false,"translateUrl":null,"linkName":"a2019ex10y.htm","type":"EX-10.Y","id":"NTFILEBQXG24nYf1XftXCy","market":"us","size":11794},{"description":"MDU RESOURCES SUBSIDIARIES OF MDU RESOURCES","seq":8,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000010/a2019ex21.htm","primary":false,"translateUrl":null,"linkName":"a2019ex21.htm","type":"EX-21","id":"NTFILEFMiw3pevqufafiJ7","market":"us","size":62249},{"description":"MDU RESOURCES CONSENT OF INDEPENDENT ACCOUNTING FIRM","seq":9,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000010/a2019ex23.htm","primary":false,"translateUrl":null,"linkName":"a2019ex23.htm","type":"EX-23","id":"NTFILED1ENLt8PEdF4wnm2","market":"us","size":2799},{"description":"MDU RESOURCES CERTIFICATION OF CHIEF EXECUTIVE OFFICER","seq":10,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000010/a2019ex31a.htm","primary":false,"translateUrl":null,"linkName":"a2019ex31a.htm","type":"EX-31.A","id":"NTFILECVzz775YFAP4kjbU","market":"us","size":10459},{"description":"MDU RESOURCES CERTIFICATION OF CHIEF FINANCIAL OFFICER","seq":11,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000010/a2019ex31b.htm","primary":false,"translateUrl":null,"linkName":"a2019ex31b.htm","type":"EX-31.B","id":"NTFILEFtYpGrPvFtX6GQnd","market":"us","size":10449},{"description":"MDU RESOURCES CERTIFICATION OF CEO AND CFO","seq":12,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000010/a2019ex32.htm","primary":false,"translateUrl":null,"linkName":"a2019ex32.htm","type":"EX-32","id":"NTFILEisL9szqDWkATsc3t","market":"us","size":6955},{"description":"MDU RESOURCES MINE SAFETY DISCLOSURES","seq":13,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000010/a2019ex95.htm","primary":false,"translateUrl":null,"linkName":"a2019ex95.htm","type":"EX-95","id":"NTFILECbAbB4HpL2thTtuF","market":"us","size":238838},{"description":"XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT","seq":14,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000010/mdu-20191231.xsd","primary":false,"translateUrl":null,"linkName":"mdu-20191231.xsd","type":"EX-101.SCH","id":"NTFILE8ZT1t3BVdpaQv7JS","market":"us","size":118830},{"description":"XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT","seq":15,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000010/mdu-20191231_cal.xml","primary":false,"translateUrl":null,"linkName":"mdu-20191231_cal.xml","type":"EX-101.CAL","id":"NTFILEFjMWMgEQK7iPV5b7","market":"us","size":155933},{"description":"XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT","seq":16,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000010/mdu-20191231_def.xml","primary":false,"translateUrl":null,"linkName":"mdu-20191231_def.xml","type":"EX-101.DEF","id":"NTFILE8Pedf6NEKMs8QHbW","market":"us","size":988266},{"description":"XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT","seq":17,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000010/mdu-20191231_lab.xml","primary":false,"translateUrl":null,"linkName":"mdu-20191231_lab.xml","type":"EX-101.LAB","id":"NTFILEgCMayACjT9H8N57k","market":"us","size":1730907},{"description":"XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT","seq":18,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000010/mdu-20191231_pre.xml","primary":false,"translateUrl":null,"linkName":"mdu-20191231_pre.xml","type":"EX-101.PRE","id":"NTFILEz5ryp2s4htAQpKn8","market":"us","size":1185976},{"description":"EXTRACTED XBRL INSTANCE DOCUMENT","seq":130,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000010/a2019form10-k_htm.xml","primary":false,"translateUrl":null,"linkName":"a2019form10-k_htm.xml","type":"XML","id":"NTFILE5D8vXM2Tf7PKuX58","market":"us","size":5937379}],"type_name":"Financial Report","type_name_en":"Financial Report","titleTypeEn":"Annual Report","us_type":"财务报告","us_type_zh":"财务报告","earn_infos":[],"event_type":"important_notice","event_name":"Annual Report","pubTime":"2020-02-21 00:00","pubTimestamp":1582214400,"title_zh":"Annual report [Section 13 and 15(d), not S-K Item 405","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"9094171","market":"us","labels":[],"media":"sec.gov","original_id":"AN9375120000512-MDU","pdf_url":null,"pub_time":1581609600000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Statement of acquisition of beneficial ownership by individuals","symbol":"MDU","title":"Statement of acquisition of beneficial ownership by individuals","titleType":"Beneficial Ownership Change","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000009375120000512/0000093751-20-000512-index.htm","us_notice_code":"Form SC 13G","us_title_en":"Statement of acquisition of beneficial ownership by individuals","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000009375120000512/MDUResourcesGroupInc.txt","primary":true,"translateUrl":null,"linkName":"MDUResourcesGroupInc.txt","type":"SC 13G","id":"NTFILEQTXGgSg5AfNUAtP7","market":"us","size":6935}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Beneficial Ownership Change","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Beneficial Ownership Change","pubTime":"2020-02-14 00:00","pubTimestamp":1581609600,"title_zh":"Statement of acquisition of beneficial ownership by individuals","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"9080096","market":"us","labels":[],"media":"sec.gov","original_id":"AN110465920017273-MDU","pdf_url":null,"pub_time":1581436800000,"showTitleType":true,"size":0,"source":"sec_us","summary":"[Amend] Statement of acquisition of beneficial ownership by individuals","symbol":"MDU","title":"[Amend] Statement of acquisition of beneficial ownership by individuals","titleType":"Beneficial Ownership Change","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000110465920017273/0001104659-20-017273-index.htm","us_notice_code":"Form SC 13G/A","us_title_en":"[Amend] Statement of acquisition of beneficial ownership by individuals","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"SCHEDULE 13G/A","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000110465920017273/tv0766-mduresourcesgroupinc.htm","primary":true,"translateUrl":null,"linkName":"tv0766-mduresourcesgroupinc.htm","type":"SC 13G/A","id":"NTFILEFWpdv6bwY2xhJTcq","market":"us","size":12188}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Beneficial Ownership Change","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Beneficial Ownership Change","pubTime":"2020-02-12 00:00","pubTimestamp":1581436800,"title_zh":"Amend] Statement of acquisition of beneficial ownership by individuals","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0}],"pageSize":20,"totalPage":11,"pageCount":7,"totalSize":203,"code":"91000000","status":"200"}]}}