US StockDetailed Quotes

Provided by Tiger Trade Technology Pte. Ltd.

MDU Resources

19.65

-0.7500-3.68%

Post-market: 19.60-0.0500-0.25%17:30 EDT

Volume:4.76M

Turnover:93.90M

Market Cap:4.02B

PE:21.24

High:20.49

Open:20.49

Low:19.62

Close:20.40

52wk High:21.49

52wk Low:15.04

Shares:204.38M

Float Shares:201.59M

Volume Ratio:2.25

T/O Rate:2.36%

Dividend:0.54

Dividend Rate:2.75%

EPS(TTM):0.9251

EPS(LYR):0.9251

ROE:7.01%

ROA:2.49%

PB:1.45

PE(LYR):21.24

Loading ...

Overview Company News Filings

Major Issues Report

Current report, items 2.02, 7.01, and 9.01

Beneficial Ownership Change

[Amend] Statement of acquisition of beneficial ownership by individuals

Major Issues Report

Current report, items 7.01 and 9.01

Statement Of Changes In Beneficial Ownership

Statement of changes in beneficial ownership of securities

Statement Of Changes In Beneficial Ownership

Statement of changes in beneficial ownership of securities

Statement Of Changes In Beneficial Ownership

Statement of changes in beneficial ownership of securities

Statement Of Changes In Beneficial Ownership

Statement of changes in beneficial ownership of securities

Statement Of Changes In Beneficial Ownership

Statement of changes in beneficial ownership of securities

Statement Of Changes In Beneficial Ownership

Statement of changes in beneficial ownership of securities

Statement Of Changes In Beneficial Ownership

Statement of changes in beneficial ownership of securities

Statement Of Changes In Beneficial Ownership

Statement of changes in beneficial ownership of securities

Statement Of Changes In Beneficial Ownership

Statement of changes in beneficial ownership of securities

Major Issues Report

Current report, items 7.01 and 9.01

Employee Stock Ownership

Securities to be offered to employees in employee benefit plans

Quarterly Report

Quarterly report [Sections 13 or 15(d)]

Major Issues Report

Current report, items 2.02, 7.01, and 9.01

Major Issues Report

Current report, items 1.04 and 9.01

Statement Of Changes In Beneficial Ownership

Statement of changes in beneficial ownership of securities

Quarterly Report

Quarterly report [Sections 13 or 15(d)]

Major Issues Report

Current report, items 2.02, 7.01, and 9.01

{"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=8"},"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":19.65,"timestamp":1774036800000,"preClose":20.4,"halted":0,"volume":4764725,"hourTrading":{"tag":"盘后","latestPrice":19.6,"preClose":19.65,"latestTime":"17:30 EDT","volume":491468,"amount":9657307.069388,"timestamp":1774042252385,"change":-0.05,"changeRate":-0.002545,"amplitude":0.002545},"delay":0,"changeRate":-0.03676470588235294,"floatShares":201591967,"shares":204382800,"eps":0.925129,"marketStatus":"Market Closed","change":-0.75,"latestTime":"03-20 16:00:00 EDT","open":20.49,"high":20.49,"low":19.615,"amount":93898611.869825,"amplitude":0.042892,"askPrice":0,"askSize":0,"bidPrice":0,"bidSize":0,"shortable":3,"etf":0,"ttmEps":0.925129,"tradingStatus":0,"nextMarketStatus":{"tag":"Pre-Mkt","tradingStatus":1,"beginTime":1774252800000},"marketStatusCode":7,"adr":0,"adrRate":0,"listingDate":838958400000,"exchange":"NYSE","adjPreClose":20.4,"dividendRate":0.027481,"preHourTrading":{"tag":"盘前","latestPrice":20.4,"preClose":20.4,"latestTime":"08:00 EDT","volume":14,"amount":285.59999999999997,"timestamp":1774008015340,"change":0,"changeRate":0,"amplitude":0},"postHourTrading":{"tag":"盘后","latestPrice":19.6,"preClose":19.65,"latestTime":"17:30 EDT","volume":491468,"amount":9657307.069388,"timestamp":1774042252385,"change":-0.05,"changeRate":-0.002545,"amplitude":0.002545},"volumeRatio":2.2487075828508805,"impliedVol":0.242,"impliedVolPercentile":0.3386},"@#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":2.2487075828508805,"shares":204382800,"dividePrice":0.54,"high":20.49,"amplitude":0.042892,"preClose":20.4,"low":19.615,"week52Low":15.04,"pbRate":"1.45","psRate":"2.14","week52High":21.49,"institutionHeld":0.9708,"latestPrice":19.65,"eps":0.925129,"divideRate":0.027481,"volume":4764725,"delay":0,"ttmEps":0.925129,"open":20.49,"prevYearClose":19.52,"prevWeekClose":21.1,"prevMonthClose":20.68,"prevQuarterClose":19.52,"fiveDayClose":21.1,"twentyDayClose":20.23,"sixtyDayClose":19.47,"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":"2026-03-20","current":21.240281,"percent":0.936648,"low":7.56446,"twenty":11.03685,"median":14.608517,"eighty":17.236771,"high":25.756639,"avg":14.608856,"sd":3.748416,"marketCap":4169409548},"quantilePoints":[{"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":"2026-03-20","current":21.898734,"twenty":11.03685,"median":14.608517,"eighty":17.236771,"marketCap":4169409548}],"updateTime":1774094091550},"$inf$@#url:\"https://stock-news.skytigris.cn/v3/notice/important/events/list\",params:#symbol:\"MDU\",pageSize:20,pageCount:8,market:\"us\",,,undefined,":[{"items":[{"cdn_pdf":false,"hasAttachments":true,"id":"9051981","market":"us","labels":[],"media":"sec.gov","original_id":"AN6771620000006-MDU","pdf_url":null,"pub_time":1580745600000,"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/67716/000006771620000006/0000067716-20-000006-index.htm","us_notice_code":"Form 8-K","us_title_en":"Current report, items 2.02, 7.01, and 9.01","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"MDU RESOURCES GROUP, INC. FORM 8-K","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000006/a2019form8-kearningsre.htm","primary":true,"translateUrl":null,"linkName":"a2019form8-kearningsre.htm","type":"8-K","id":"NTFILEDmF6rnJwEJ9pRdd9","market":"us","size":38907},{"description":"MDU RESOURCES GROUP, INC. EX 99","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000006/a2019earningsreleaseex.htm","primary":false,"translateUrl":null,"linkName":"a2019earningsreleaseex.htm","type":"EX-99","id":"NTFILED195VMn2DmyDXjUF","market":"us","size":563078},{"description":"XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000006/mdu-20200204.xsd","primary":false,"translateUrl":null,"linkName":"mdu-20200204.xsd","type":"EX-101.SCH","id":"NTFILE54tdQ7YupcxMycen","market":"us","size":4562},{"description":"XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000006/mdu-20200204_cal.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200204_cal.xml","type":"EX-101.CAL","id":"NTFILEBCizjxvifvaKwKUN","market":"us","size":609},{"description":"XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000006/mdu-20200204_def.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200204_def.xml","type":"EX-101.DEF","id":"NTFILEG6riKdsKDKev8uRV","market":"us","size":14527},{"description":"XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT","seq":6,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000006/mdu-20200204_lab.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200204_lab.xml","type":"EX-101.LAB","id":"NTFILEE3ForSew8159kgPK","market":"us","size":31381},{"description":"XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT","seq":7,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000006/mdu-20200204_pre.xml","primary":false,"translateUrl":null,"linkName":"mdu-20200204_pre.xml","type":"EX-101.PRE","id":"NTFILEBip8cUt75vSvKbjx","market":"us","size":16430},{"description":"MDU RESOURCES GROUP, INC. LOGO","seq":8,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000006/mdurirpressreleasebasa16.jpg","primary":false,"translateUrl":null,"linkName":"mdurirpressreleasebasa16.jpg","type":"GRAPHIC","id":"NTFILEE5zBt74gQHjxnQva","market":"us","size":748436},{"description":"EXTRACTED XBRL INSTANCE DOCUMENT","seq":16,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771620000006/a2019form8-kearningsre_htm.xml","primary":false,"translateUrl":null,"linkName":"a2019form8-kearningsre_htm.xml","type":"XML","id":"NTFILE8EEC3giyJSqGzfAw","market":"us","size":4488}],"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":"2020-02-04 00:00","pubTimestamp":1580745600,"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":"9050063","market":"us","labels":[],"media":"sec.gov","original_id":"AN83423720002210-MDU","pdf_url":null,"pub_time":1580745600000,"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/67716/000083423720002210/0000834237-20-002210-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":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000083423720002210/us5526901096_020320.txt","primary":true,"translateUrl":null,"linkName":"us5526901096_020320.txt","type":"SC 13G/A","id":"NTFILEDWUQfHc75AirMY69","market":"us","size":11768}],"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":"2020-02-04 00:00","pubTimestamp":1580745600,"title_zh":"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":"8826512","market":"us","labels":[],"media":"sec.gov","original_id":"AN6771619000086-MDU","pdf_url":null,"pub_time":1575820800000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Current report, items 7.01 and 9.01","symbol":"MDU","title":"Current report, items 7.01 and 9.01","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000086/0000067716-19-000086-index.htm","us_notice_code":"Form 8-K","us_title_en":"Current report, items 7.01 and 9.01","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/67716/000006771619000086/a2019ex99-earningsguid.htm","primary":true,"translateUrl":null,"linkName":"a2019ex99-earningsguid.htm","type":"EX-99","id":"NTFILE9A13TUaw5eFW63de","market":"us","size":7611},{"description":"MDU RESOURCES FORM 8-K EARNINGS GUIDANCE","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000086/a2019form8-kearningsgu.htm","primary":false,"translateUrl":null,"linkName":"a2019form8-kearningsgu.htm","type":"8-K","id":"NTFILEBiG98Ze3DyGKaV2s","market":"us","size":40845},{"description":"XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000086/mdu-20191209.xsd","primary":false,"translateUrl":null,"linkName":"mdu-20191209.xsd","type":"EX-101.SCH","id":"NTFILE6mPuPriBtH2frVDn","market":"us","size":4562},{"description":"XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000086/mdu-20191209_cal.xml","primary":false,"translateUrl":null,"linkName":"mdu-20191209_cal.xml","type":"EX-101.CAL","id":"NTFILE2nCbWcGF425Jqspy","market":"us","size":609},{"description":"XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000086/mdu-20191209_def.xml","primary":false,"translateUrl":null,"linkName":"mdu-20191209_def.xml","type":"EX-101.DEF","id":"NTFILEGkKyxT8Q84UULg2W","market":"us","size":14577},{"description":"XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT","seq":6,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000086/mdu-20191209_lab.xml","primary":false,"translateUrl":null,"linkName":"mdu-20191209_lab.xml","type":"EX-101.LAB","id":"NTFILE8E8AV3ec5mao7Sur","market":"us","size":31381},{"description":"XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT","seq":7,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000086/mdu-20191209_pre.xml","primary":false,"translateUrl":null,"linkName":"mdu-20191209_pre.xml","type":"EX-101.PRE","id":"NTFILEEChkzqh9oM7uVRr2","market":"us","size":16430},{"description":"","seq":8,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000086/mdurirpressreleasebasa07.jpg","primary":false,"translateUrl":null,"linkName":"mdurirpressreleasebasa07.jpg","type":"GRAPHIC","id":"NTFILE3NnHMk3TvP2qtYDR","market":"us","size":748436},{"description":"EXTRACTED XBRL INSTANCE DOCUMENT","seq":14,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000086/a2019form8-kearningsgu_htm.xml","primary":false,"translateUrl":null,"linkName":"a2019form8-kearningsgu_htm.xml","type":"XML","id":"NTFILEhSYori7T6FvH543W","market":"us","size":4392}],"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":"2019-12-09 00:00","pubTimestamp":1575820800,"title_zh":"Current report, items 7.01 and 9.01","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":"8775335","market":"us","labels":[],"media":"sec.gov","original_id":"AN122520819014711-MDU","pdf_url":null,"pub_time":1574179200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Statement of changes in beneficial ownership of securities","symbol":"MDU","title":"Statement of changes in beneficial ownership of securities","titleType":"Statement Of Changes In Beneficial Ownership","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014711/0001225208-19-014711-index.htm","us_notice_code":"Form 4","us_title_en":"Statement of changes in beneficial ownership of securities","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014711/xslF345X03/doc4.xml","primary":true,"translateUrl":null,"linkName":"doc4.html","type":"4","id":"NTFILECj4fP2mg1Zcb62Em","market":"us","size":0},{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014711/doc4.xml","primary":false,"translateUrl":null,"linkName":"doc4.xml","type":"4","id":"NTFILE8RBqwcaEKifsMh6J","market":"us","size":4871}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Statement Of Changes In Beneficial Ownership","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Statement Of Changes In Beneficial Ownership","pubTime":"2019-11-20 00:00","pubTimestamp":1574179200,"title_zh":"Statement of changes in beneficial ownership of securities","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8775334","market":"us","labels":[],"media":"sec.gov","original_id":"AN122520819014719-MDU","pdf_url":null,"pub_time":1574179200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Statement of changes in beneficial ownership of securities","symbol":"MDU","title":"Statement of changes in beneficial ownership of securities","titleType":"Statement Of Changes In Beneficial Ownership","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014719/0001225208-19-014719-index.htm","us_notice_code":"Form 4","us_title_en":"Statement of changes in beneficial ownership of securities","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014719/xslF345X03/doc4.xml","primary":true,"translateUrl":null,"linkName":"doc4.html","type":"4","id":"NTFILE7mMobqqeFMtscTkU","market":"us","size":0},{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014719/doc4.xml","primary":false,"translateUrl":null,"linkName":"doc4.xml","type":"4","id":"NTFILE13gNWXxT3AFazAFU","market":"us","size":3492}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Statement Of Changes In Beneficial Ownership","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Statement Of Changes In Beneficial Ownership","pubTime":"2019-11-20 00:00","pubTimestamp":1574179200,"title_zh":"Statement of changes in beneficial ownership of securities","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8775333","market":"us","labels":[],"media":"sec.gov","original_id":"AN122520819014714-MDU","pdf_url":null,"pub_time":1574179200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Statement of changes in beneficial ownership of securities","symbol":"MDU","title":"Statement of changes in beneficial ownership of securities","titleType":"Statement Of Changes In Beneficial Ownership","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014714/0001225208-19-014714-index.htm","us_notice_code":"Form 4","us_title_en":"Statement of changes in beneficial ownership of securities","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014714/xslF345X03/doc4.xml","primary":true,"translateUrl":null,"linkName":"doc4.html","type":"4","id":"NTFILE6JeGTR3DhvTT82MN","market":"us","size":0},{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014714/doc4.xml","primary":false,"translateUrl":null,"linkName":"doc4.xml","type":"4","id":"NTFILE8zy8pko6nGQLQGkh","market":"us","size":4180}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Statement Of Changes In Beneficial Ownership","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Statement Of Changes In Beneficial Ownership","pubTime":"2019-11-20 00:00","pubTimestamp":1574179200,"title_zh":"Statement of changes in beneficial ownership of securities","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8775332","market":"us","labels":[],"media":"sec.gov","original_id":"AN122520819014718-MDU","pdf_url":null,"pub_time":1574179200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Statement of changes in beneficial ownership of securities","symbol":"MDU","title":"Statement of changes in beneficial ownership of securities","titleType":"Statement Of Changes In Beneficial Ownership","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014718/0001225208-19-014718-index.htm","us_notice_code":"Form 4","us_title_en":"Statement of changes in beneficial ownership of securities","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014718/xslF345X03/doc4.xml","primary":true,"translateUrl":null,"linkName":"doc4.html","type":"4","id":"NTFILEFbqW6jLmAFbqhjNY","market":"us","size":0},{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014718/doc4.xml","primary":false,"translateUrl":null,"linkName":"doc4.xml","type":"4","id":"NTFILEAXXYCF4X7pwtGFXQ","market":"us","size":2800}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Statement Of Changes In Beneficial Ownership","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Statement Of Changes In Beneficial Ownership","pubTime":"2019-11-20 00:00","pubTimestamp":1574179200,"title_zh":"Statement of changes in beneficial ownership of securities","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8775331","market":"us","labels":[],"media":"sec.gov","original_id":"AN122520819014717-MDU","pdf_url":null,"pub_time":1574179200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Statement of changes in beneficial ownership of securities","symbol":"MDU","title":"Statement of changes in beneficial ownership of securities","titleType":"Statement Of Changes In Beneficial Ownership","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014717/0001225208-19-014717-index.htm","us_notice_code":"Form 4","us_title_en":"Statement of changes in beneficial ownership of securities","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014717/xslF345X03/doc4.xml","primary":true,"translateUrl":null,"linkName":"doc4.html","type":"4","id":"NTFILE9q52bbLw444Gf7oy","market":"us","size":0},{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014717/doc4.xml","primary":false,"translateUrl":null,"linkName":"doc4.xml","type":"4","id":"NTFILE3FuwEzt2xSc2hYpB","market":"us","size":2762}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Statement Of Changes In Beneficial Ownership","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Statement Of Changes In Beneficial Ownership","pubTime":"2019-11-20 00:00","pubTimestamp":1574179200,"title_zh":"Statement of changes in beneficial ownership of securities","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8775330","market":"us","labels":[],"media":"sec.gov","original_id":"AN122520819014720-MDU","pdf_url":null,"pub_time":1574179200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Statement of changes in beneficial ownership of securities","symbol":"MDU","title":"Statement of changes in beneficial ownership of securities","titleType":"Statement Of Changes In Beneficial Ownership","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014720/0001225208-19-014720-index.htm","us_notice_code":"Form 4","us_title_en":"Statement of changes in beneficial ownership of securities","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014720/xslF345X03/doc4.xml","primary":true,"translateUrl":null,"linkName":"doc4.html","type":"4","id":"NTFILE5493m1Vo3uSMRm53","market":"us","size":0},{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014720/doc4.xml","primary":false,"translateUrl":null,"linkName":"doc4.xml","type":"4","id":"NTFILEHwG7S7Jbatf8dygh","market":"us","size":2794}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Statement Of Changes In Beneficial Ownership","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Statement Of Changes In Beneficial Ownership","pubTime":"2019-11-20 00:00","pubTimestamp":1574179200,"title_zh":"Statement of changes in beneficial ownership of securities","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8775329","market":"us","labels":[],"media":"sec.gov","original_id":"AN122520819014715-MDU","pdf_url":null,"pub_time":1574179200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Statement of changes in beneficial ownership of securities","symbol":"MDU","title":"Statement of changes in beneficial ownership of securities","titleType":"Statement Of Changes In Beneficial Ownership","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014715/0001225208-19-014715-index.htm","us_notice_code":"Form 4","us_title_en":"Statement of changes in beneficial ownership of securities","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014715/xslF345X03/doc4.xml","primary":true,"translateUrl":null,"linkName":"doc4.html","type":"4","id":"NTFILEJA3L8xirAY6qkXh4","market":"us","size":0},{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014715/doc4.xml","primary":false,"translateUrl":null,"linkName":"doc4.xml","type":"4","id":"NTFILE5PtNbvpBpEzy42AT","market":"us","size":2799}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Statement Of Changes In Beneficial Ownership","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Statement Of Changes In Beneficial Ownership","pubTime":"2019-11-20 00:00","pubTimestamp":1574179200,"title_zh":"Statement of changes in beneficial ownership of securities","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8775328","market":"us","labels":[],"media":"sec.gov","original_id":"AN122520819014712-MDU","pdf_url":null,"pub_time":1574179200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Statement of changes in beneficial ownership of securities","symbol":"MDU","title":"Statement of changes in beneficial ownership of securities","titleType":"Statement Of Changes In Beneficial Ownership","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014712/0001225208-19-014712-index.htm","us_notice_code":"Form 4","us_title_en":"Statement of changes in beneficial ownership of securities","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014712/xslF345X03/doc4.xml","primary":true,"translateUrl":null,"linkName":"doc4.html","type":"4","id":"NTFILEAFpWSNR7NEDf4PA4","market":"us","size":0},{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014712/doc4.xml","primary":false,"translateUrl":null,"linkName":"doc4.xml","type":"4","id":"NTFILE5RZf9CSHDYQ2u4oB","market":"us","size":2796}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Statement Of Changes In Beneficial Ownership","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Statement Of Changes In Beneficial Ownership","pubTime":"2019-11-20 00:00","pubTimestamp":1574179200,"title_zh":"Statement of changes in beneficial ownership of securities","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8775327","market":"us","labels":[],"media":"sec.gov","original_id":"AN122520819014716-MDU","pdf_url":null,"pub_time":1574179200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Statement of changes in beneficial ownership of securities","symbol":"MDU","title":"Statement of changes in beneficial ownership of securities","titleType":"Statement Of Changes In Beneficial Ownership","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014716/0001225208-19-014716-index.htm","us_notice_code":"Form 4","us_title_en":"Statement of changes in beneficial ownership of securities","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014716/xslF345X03/doc4.xml","primary":true,"translateUrl":null,"linkName":"doc4.html","type":"4","id":"NTFILECFncoSViv9igS3bW","market":"us","size":0},{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000122520819014716/doc4.xml","primary":false,"translateUrl":null,"linkName":"doc4.xml","type":"4","id":"NTFILEGQUfBLVd1R7kezCX","market":"us","size":2797}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Statement Of Changes In Beneficial Ownership","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Statement Of Changes In Beneficial Ownership","pubTime":"2019-11-20 00:00","pubTimestamp":1574179200,"title_zh":"Statement of changes in beneficial ownership of securities","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8768414","market":"us","labels":[],"media":"sec.gov","original_id":"AN6771619000081-MDU","pdf_url":null,"pub_time":1574006400000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Current report, items 7.01 and 9.01","symbol":"MDU","title":"Current report, items 7.01 and 9.01","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000081/0000067716-19-000081-index.htm","us_notice_code":"Form 8-K","us_title_en":"Current report, items 7.01 and 9.01","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"MDU RESOURCES FORM 8-K CAP EX","seq":1,"linkUrl":"https://www.sec.gov/ix?doc=/Archives/edgar/data/67716/000006771619000081/a2019form8-kcapexforec.htm","primary":true,"translateUrl":null,"linkName":"a2019form8-kcapexforec.htm","type":"8-K","id":"NTFILE12xESPZmoFRqRu8i","market":"us","size":40917},{"description":"MDU RESOURCES EXHIBIT 99 CAP EX","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000081/a2019ex99-capexforecast.htm","primary":false,"translateUrl":null,"linkName":"a2019ex99-capexforecast.htm","type":"EX-99","id":"NTFILE3PeA2d5CJbguoGtk","market":"us","size":50219},{"description":"XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000081/mdu-20191118.xsd","primary":false,"translateUrl":null,"linkName":"mdu-20191118.xsd","type":"EX-101.SCH","id":"NTFILEBuwx9NPtQpR3cczC","market":"us","size":4562},{"description":"XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000081/mdu-20191118_cal.xml","primary":false,"translateUrl":null,"linkName":"mdu-20191118_cal.xml","type":"EX-101.CAL","id":"NTFILE3YrRTcSGra4wH8B8","market":"us","size":609},{"description":"XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000081/mdu-20191118_def.xml","primary":false,"translateUrl":null,"linkName":"mdu-20191118_def.xml","type":"EX-101.DEF","id":"NTFILEBgQYLNEi48k6RBLP","market":"us","size":14577},{"description":"XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT","seq":6,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000081/mdu-20191118_lab.xml","primary":false,"translateUrl":null,"linkName":"mdu-20191118_lab.xml","type":"EX-101.LAB","id":"NTFILE5r6kF1mFpL1U8tFZ","market":"us","size":31381},{"description":"XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT","seq":7,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000081/mdu-20191118_pre.xml","primary":false,"translateUrl":null,"linkName":"mdu-20191118_pre.xml","type":"EX-101.PRE","id":"NTFILESFVB1oQQt9b7it4f","market":"us","size":16430},{"description":"","seq":8,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000081/mdurirpressreleasebasa07.jpg","primary":false,"translateUrl":null,"linkName":"mdurirpressreleasebasa07.jpg","type":"GRAPHIC","id":"NTFILE9ThyehiiGPjyCcyD","market":"us","size":748436},{"description":"EXTRACTED XBRL INSTANCE DOCUMENT","seq":9,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000081/a2019form8-kcapexforec_htm.xml","primary":false,"translateUrl":null,"linkName":"a2019form8-kcapexforec_htm.xml","type":"XML","id":"NTFILEB4Vcfn1sGR2EJQj7","market":"us","size":4488}],"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":"2019-11-18 00:00","pubTimestamp":1574006400,"title_zh":"Current report, items 7.01 and 9.01","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8768244","market":"us","labels":[],"media":"sec.gov","original_id":"AN110465919065108-MDU","pdf_url":null,"pub_time":1574006400000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Securities to be offered to employees in employee benefit plans","symbol":"MDU","title":"Securities to be offered to employees in employee benefit plans","titleType":"Employee Stock Ownership","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000110465919065108/0001104659-19-065108-index.htm","us_notice_code":"Form S-8","us_title_en":"Securities to be offered to employees in employee benefit plans","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"S-8","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000110465919065108/a19-23003_1s8.htm","primary":true,"translateUrl":null,"linkName":"a19-23003_1s8.htm","type":"S-8","id":"NTFILEDKe36QgsheoPCz8W","market":"us","size":119095},{"description":"EX-5.(A)","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000110465919065108/a19-23003_1ex5da.htm","primary":false,"translateUrl":null,"linkName":"a19-23003_1ex5da.htm","type":"EX-5.(A)","id":"NTFILEBsav5VVA3NBRecod","market":"us","size":7270},{"description":"EX-23.(A)","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000110465919065108/a19-23003_1ex23da.htm","primary":false,"translateUrl":null,"linkName":"a19-23003_1ex23da.htm","type":"EX-23.(A)","id":"NTFILEAoMW82zxHGQGMQHP","market":"us","size":2541},{"description":"EX-23.(B)","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000110465919065108/a19-23003_1ex23db.htm","primary":false,"translateUrl":null,"linkName":"a19-23003_1ex23db.htm","type":"EX-23.(B)","id":"NTFILECz2TTpnLDUPjR9NU","market":"us","size":3693},{"description":"GRAPHIC","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000110465919065108/g230031kci001.jpg","primary":false,"translateUrl":null,"linkName":"g230031kci001.jpg","type":"GRAPHIC","id":"NTFILE4WQDwRmZRQaVXbap","market":"us","size":6288}],"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":"2019-11-18 00:00","pubTimestamp":1574006400,"title_zh":"Securities to be offered to employees in employee benefit plans","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8597909","market":"us","labels":[],"media":"sec.gov","original_id":"AN6771619000076-MDU","pdf_url":null,"pub_time":1572537600000,"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/67716/000006771619000076/0000067716-19-000076-index.htm","us_notice_code":"Form 10-Q","us_title_en":"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 9-30-2019","seq":1,"linkUrl":"https://www.sec.gov/ix?doc=/Archives/edgar/data/67716/000006771619000076/a2019q3form10-q.htm","primary":true,"translateUrl":null,"linkName":"a2019q3form10-q.htm","type":"10-Q","id":"NTFILEA8oVoFGwHp6KCyod","market":"us","size":3470116},{"description":"MDU RESOURCES MDU NPA 7-24-2019","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000076/a2019q3ex4a.htm","primary":false,"translateUrl":null,"linkName":"a2019q3ex4a.htm","type":"EX-4.A","id":"NTFILE26cgp1FjhWix9kL7","market":"us","size":601940},{"description":"MDU RESOURCES 401 K RETIREMENT PLAN 8-22-2019","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000076/a2019q3ex10a.htm","primary":false,"translateUrl":null,"linkName":"a2019q3ex10a.htm","type":"EX-10.A","id":"NTFILEnc28goNFR2AHXG5L","market":"us","size":5448},{"description":"MDU RESOURCES CERTIFICATION OF CHIEF EXECUTIVE OFFICER","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000076/a2019q3ex31a.htm","primary":false,"translateUrl":null,"linkName":"a2019q3ex31a.htm","type":"EX-31.A","id":"NTFILE8Lsa2bQUvJDQLMxn","market":"us","size":9819},{"description":"MDU RESOURCES CERTIFICATION OF CHIEF FINANCIAL OFFICER","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000076/a2019q3ex31b.htm","primary":false,"translateUrl":null,"linkName":"a2019q3ex31b.htm","type":"EX-31.B","id":"NTFILEGxpKNW36nD88RNNy","market":"us","size":9250},{"description":"MDU RESOURCES CERTIFICATION OF CEO AND CFO","seq":6,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000076/a2019q3ex32.htm","primary":false,"translateUrl":null,"linkName":"a2019q3ex32.htm","type":"EX-32","id":"NTFILEtKVXvrWCpa88Tn3M","market":"us","size":6880},{"description":"MDU RESOURCES MINE SAFETY DISCLOSURES","seq":7,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000076/a2019q3ex95.htm","primary":false,"translateUrl":null,"linkName":"a2019q3ex95.htm","type":"EX-95","id":"NTFILEHYkDBQaK1wdAXKYw","market":"us","size":109387},{"description":"XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT","seq":8,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000076/mdu-20190930.xsd","primary":false,"translateUrl":null,"linkName":"mdu-20190930.xsd","type":"EX-101.SCH","id":"NTFILEETaqcpS5siEU4ems","market":"us","size":68803},{"description":"XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT","seq":9,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000076/mdu-20190930_cal.xml","primary":false,"translateUrl":null,"linkName":"mdu-20190930_cal.xml","type":"EX-101.CAL","id":"NTFILEBqQ6RJhMLn1AYrUY","market":"us","size":114537},{"description":"XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT","seq":10,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000076/mdu-20190930_def.xml","primary":false,"translateUrl":null,"linkName":"mdu-20190930_def.xml","type":"EX-101.DEF","id":"NTFILE7hCiYAnUhKuXpTtV","market":"us","size":507644},{"description":"XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT","seq":11,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000076/mdu-20190930_lab.xml","primary":false,"translateUrl":null,"linkName":"mdu-20190930_lab.xml","type":"EX-101.LAB","id":"NTFILE23ZfoEwHAg7Ebx7c","market":"us","size":977240},{"description":"XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT","seq":12,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000076/mdu-20190930_pre.xml","primary":false,"translateUrl":null,"linkName":"mdu-20190930_pre.xml","type":"EX-101.PRE","id":"NTFILE2xCfsikJXE5yzmFG","market":"us","size":621736},{"description":"EXTRACTED XBRL INSTANCE DOCUMENT","seq":58,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000076/a2019q3form10-q_htm.xml","primary":false,"translateUrl":null,"linkName":"a2019q3form10-q_htm.xml","type":"XML","id":"NTFILETZf1ooGU1F7tcFTf","market":"us","size":3676524}],"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":"2019-11-01 00:00","pubTimestamp":1572537600,"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":"8591027","market":"us","labels":[],"media":"sec.gov","original_id":"AN6771619000070-MDU","pdf_url":null,"pub_time":1572364800000,"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/67716/000006771619000070/0000067716-19-000070-index.htm","us_notice_code":"Form 8-K","us_title_en":"Current report, items 2.02, 7.01, and 9.01","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"MDU RESOURCES GROUP, INC. FORM 8-K","seq":1,"linkUrl":"https://www.sec.gov/ix?doc=/Archives/edgar/data/67716/000006771619000070/a2019q3form8-k.htm","primary":true,"translateUrl":null,"linkName":"a2019q3form8-k.htm","type":"8-K","id":"NTFILEntZDyYHvDFj4foVY","market":"us","size":39312},{"description":"MDU RESOURCES GROUP, INC. EX 99","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000070/a2019q3ex99.htm","primary":false,"translateUrl":null,"linkName":"a2019q3ex99.htm","type":"EX-99","id":"NTFILEBGcQrX2Ls4gchkPc","market":"us","size":538050},{"description":"XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000070/mdu-20191029.xsd","primary":false,"translateUrl":null,"linkName":"mdu-20191029.xsd","type":"EX-101.SCH","id":"NTFILE7ySoZwRP8vPTQdpA","market":"us","size":4562},{"description":"XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000070/mdu-20191029_cal.xml","primary":false,"translateUrl":null,"linkName":"mdu-20191029_cal.xml","type":"EX-101.CAL","id":"NTFILEHDJ6nT9nme61pZG8","market":"us","size":609},{"description":"XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000070/mdu-20191029_def.xml","primary":false,"translateUrl":null,"linkName":"mdu-20191029_def.xml","type":"EX-101.DEF","id":"NTFILE5Hf8JWJd6rYmMs6Z","market":"us","size":14527},{"description":"XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT","seq":6,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000070/mdu-20191029_lab.xml","primary":false,"translateUrl":null,"linkName":"mdu-20191029_lab.xml","type":"EX-101.LAB","id":"NTFILE7rqYTvvtNBVfZFTv","market":"us","size":31381},{"description":"XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT","seq":7,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000070/mdu-20191029_pre.xml","primary":false,"translateUrl":null,"linkName":"mdu-20191029_pre.xml","type":"EX-101.PRE","id":"NTFILE4B2qyrh5VMSjXW2Z","market":"us","size":16430},{"description":"MDU RESOURCES GROUP, INC. LOGO","seq":8,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000070/mdurirpressreleasebasa12.jpg","primary":false,"translateUrl":null,"linkName":"mdurirpressreleasebasa12.jpg","type":"GRAPHIC","id":"NTFILE8spHqMGzUR3LWeKb","market":"us","size":748436},{"description":"EXTRACTED XBRL INSTANCE DOCUMENT","seq":10,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000070/a2019q3form8-k_htm.xml","primary":false,"translateUrl":null,"linkName":"a2019q3form8-k_htm.xml","type":"XML","id":"NTFILEBoTiCiQPHGUksBCZ","market":"us","size":4629}],"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":"2019-10-30 00:00","pubTimestamp":1572364800,"title_zh":"Current report, items 2.02, 7.01, and 9.01","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8548880","market":"us","labels":[],"media":"sec.gov","original_id":"AN6771619000067-MDU","pdf_url":null,"pub_time":1570118400000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Current report, items 1.04 and 9.01","symbol":"MDU","title":"Current report, items 1.04 and 9.01","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000067/0000067716-19-000067-index.htm","us_notice_code":"Form 8-K","us_title_en":"Current report, items 1.04 and 9.01","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"8-K","seq":1,"linkUrl":"https://www.sec.gov/ix?doc=/Archives/edgar/data/67716/000006771619000067/a2019octoberform8-k.htm","primary":true,"translateUrl":null,"linkName":"a2019octoberform8-k.htm","type":"8-K","id":"NTFILE28WJUFeCwwyP3RJp","market":"us","size":43239},{"description":"XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000067/mdu-20191001.xsd","primary":false,"translateUrl":null,"linkName":"mdu-20191001.xsd","type":"EX-101.SCH","id":"NTFILE6GMSfiih4P1CrP3Q","market":"us","size":4562},{"description":"XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000067/mdu-20191001_cal.xml","primary":false,"translateUrl":null,"linkName":"mdu-20191001_cal.xml","type":"EX-101.CAL","id":"NTFILE3pRFNevRH7XtDd4n","market":"us","size":609},{"description":"XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000067/mdu-20191001_def.xml","primary":false,"translateUrl":null,"linkName":"mdu-20191001_def.xml","type":"EX-101.DEF","id":"NTFILE2ZuDBBnmByDjgEcG","market":"us","size":14527},{"description":"XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000067/mdu-20191001_lab.xml","primary":false,"translateUrl":null,"linkName":"mdu-20191001_lab.xml","type":"EX-101.LAB","id":"NTFILE3wNn6KoqqKXxZrkL","market":"us","size":31381},{"description":"XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT","seq":6,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000067/mdu-20191001_pre.xml","primary":false,"translateUrl":null,"linkName":"mdu-20191001_pre.xml","type":"EX-101.PRE","id":"NTFILE6CYMkjouzHvRohya","market":"us","size":16430},{"description":"EXTRACTED XBRL INSTANCE DOCUMENT","seq":15,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000067/a2019octoberform8-k_htm.xml","primary":false,"translateUrl":null,"linkName":"a2019octoberform8-k_htm.xml","type":"XML","id":"NTFILEHG79wNaR67ENcBT2","market":"us","size":4371}],"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":"2019-10-04 00:00","pubTimestamp":1570118400,"title_zh":"Current report, items 1.04 and 9.01","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8544434","market":"us","labels":[],"media":"sec.gov","original_id":"AN122520819012873-MDU","pdf_url":null,"pub_time":1569859200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Statement of changes in beneficial ownership of securities","symbol":"MDU","title":"Statement of changes in beneficial ownership of securities","titleType":"Statement Of Changes In Beneficial Ownership","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/67716/000122520819012873/0001225208-19-012873-index.htm","us_notice_code":"Form 4","us_title_en":"Statement of changes in beneficial ownership of securities","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000122520819012873/xslF345X03/doc4.xml","primary":true,"translateUrl":null,"linkName":"doc4.html","type":"4","id":"NTFILEDpNiEcK6QDpmeaVD","market":"us","size":0},{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000122520819012873/doc4.xml","primary":false,"translateUrl":null,"linkName":"doc4.xml","type":"4","id":"NTFILE418HPrhP1CKBDhKp","market":"us","size":2804}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Statement Of Changes In Beneficial Ownership","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Statement Of Changes In Beneficial Ownership","pubTime":"2019-10-01 00:00","pubTimestamp":1569859200,"title_zh":"Statement of changes in beneficial ownership of securities","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8445992","market":"us","labels":[],"media":"sec.gov","original_id":"AN6771619000060-MDU","pdf_url":null,"pub_time":1564675200000,"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/67716/000006771619000060/0000067716-19-000060-index.htm","us_notice_code":"Form 10-Q","us_title_en":"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 6-30-2019","seq":1,"linkUrl":"https://www.sec.gov/ix?doc=/Archives/edgar/data/67716/000006771619000060/a2019q2form10-q.htm","primary":true,"translateUrl":null,"linkName":"a2019q2form10-q.htm","type":"10-Q","id":"NTFILEEpes6HW47Yu7TrDM","market":"us","size":3317753},{"description":"MDU RESOURCES CEHI NPA 12-20-2012","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000060/a2019q2ex4a.htm","primary":false,"translateUrl":null,"linkName":"a2019q2ex4a.htm","type":"EX-4.A","id":"NTFILE3BYv2mPVR51r7JhF","market":"us","size":586497},{"description":"MDU RESOURCES DIRECTOR COMPENSATION POLICY 5-8-2019","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000060/a2019q2ex10a.htm","primary":false,"translateUrl":null,"linkName":"a2019q2ex10a.htm","type":"EX-10.A","id":"NTFILE3nydLokfZTM4GRNT","market":"us","size":34679},{"description":"MDU RESOURCES 401 K RETIREMENT PLAN AMENDMENT 4-25-2018","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000060/a2019q2ex10b.htm","primary":false,"translateUrl":null,"linkName":"a2019q2ex10b.htm","type":"EX-10.B","id":"NTFILE3FEfzS9mHntYdDct","market":"us","size":16588},{"description":"MDU RESOURCES 401 K RETIREMENT PLAN AMENDMENT 9-6-2018","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000060/a2019q2ex10c.htm","primary":false,"translateUrl":null,"linkName":"a2019q2ex10c.htm","type":"EX-10.C","id":"NTFILE4BaS7vpiwxJvrmBq","market":"us","size":63307},{"description":"MDU RESOURCES 401 K RETIREMENT PLAN AMENDMENT 12-20-2018","seq":6,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000060/a2019q2ex10d.htm","primary":false,"translateUrl":null,"linkName":"a2019q2ex10d.htm","type":"EX-10.D","id":"NTFILEDgJrMASYtgapKHkM","market":"us","size":11837},{"description":"MDU RESOURCES 401 K RETIREMENT PLAN AMENDMENT 3-22-2019","seq":7,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000060/a2019q2ex10e.htm","primary":false,"translateUrl":null,"linkName":"a2019q2ex10e.htm","type":"EX-10.E","id":"NTFILE25ZL2TTnSbm15pqK","market":"us","size":47743},{"description":"MDU RESOURCES CERTIFICATION OF CHIEF EXECUTIVE OFFICER","seq":8,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000060/a2019q2ex31a.htm","primary":false,"translateUrl":null,"linkName":"a2019q2ex31a.htm","type":"EX-31.A","id":"NTFILE4Lb5HjVjTY5JqjBH","market":"us","size":9817},{"description":"MDU RESOURCES CERTIFICATION OF CHIEF FINANCIAL OFFICER","seq":9,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000060/a2019q2ex31b.htm","primary":false,"translateUrl":null,"linkName":"a2019q2ex31b.htm","type":"EX-31.B","id":"NTFILED831mHEi8G5Wmz6y","market":"us","size":9248},{"description":"MDU RESOURCES CERTIFICATION OF CEO AND CFO","seq":10,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000060/a2019q2ex32.htm","primary":false,"translateUrl":null,"linkName":"a2019q2ex32.htm","type":"EX-32","id":"NTFILEDSGbi3zdEEpSe1S2","market":"us","size":6874},{"description":"MDU RESOURCES MINE SAFETY DISCLOSURES","seq":11,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000060/a2019q2ex95.htm","primary":false,"translateUrl":null,"linkName":"a2019q2ex95.htm","type":"EX-95","id":"NTFILE9776muKj8hfGou5o","market":"us","size":102495},{"description":"XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT","seq":12,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000060/mdu-20190630.xsd","primary":false,"translateUrl":null,"linkName":"mdu-20190630.xsd","type":"EX-101.SCH","id":"NTFILE74THN6RsUgtshSPk","market":"us","size":66752},{"description":"XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT","seq":13,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000060/mdu-20190630_cal.xml","primary":false,"translateUrl":null,"linkName":"mdu-20190630_cal.xml","type":"EX-101.CAL","id":"NTFILE9bUG31u65ZVipaen","market":"us","size":113635},{"description":"XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT","seq":14,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000060/mdu-20190630_def.xml","primary":false,"translateUrl":null,"linkName":"mdu-20190630_def.xml","type":"EX-101.DEF","id":"NTFILEDU3ng3pW1VzcJTnn","market":"us","size":459404},{"description":"XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT","seq":15,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000060/mdu-20190630_lab.xml","primary":false,"translateUrl":null,"linkName":"mdu-20190630_lab.xml","type":"EX-101.LAB","id":"NTFILEEqk7CxV2zXVnR2eM","market":"us","size":920593},{"description":"XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT","seq":16,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000060/mdu-20190630_pre.xml","primary":false,"translateUrl":null,"linkName":"mdu-20190630_pre.xml","type":"EX-101.PRE","id":"NTFILE55pPdPUCrGswjL5u","market":"us","size":575977},{"description":"EXTRACTED XBRL INSTANCE DOCUMENT","seq":17,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000060/a2019q2form10-q_htm.xml","primary":false,"translateUrl":null,"linkName":"a2019q2form10-q_htm.xml","type":"XML","id":"NTFILE7USZfFEB5Vvm9Zwi","market":"us","size":3532390}],"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":"2019-08-02 00:00","pubTimestamp":1564675200,"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":"8434968","market":"us","labels":[],"media":"sec.gov","original_id":"AN6771619000056-MDU","pdf_url":null,"pub_time":1564416000000,"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/67716/000006771619000056/0000067716-19-000056-index.htm","us_notice_code":"Form 8-K","us_title_en":"Current report, items 2.02, 7.01, and 9.01","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"MDU RESOURCES GROUP, INC. FORM 8-K","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000056/a2019q2form8-k.htm","primary":true,"translateUrl":null,"linkName":"a2019q2form8-k.htm","type":"8-K","id":"NTFILEAh66zAWh22jB5Kyv","market":"us","size":22919},{"description":"MDU RESOURCES GROUP, INC. EX 99","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000056/a2019q2ex99.htm","primary":false,"translateUrl":null,"linkName":"a2019q2ex99.htm","type":"EX-99","id":"NTFILEPXC8mwX1GtXJcSgH","market":"us","size":554725},{"description":"MDU RESOURCES GROUP, INC. LOGO","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/67716/000006771619000056/mdurirpressreleasebasa11.jpg","primary":false,"translateUrl":null,"linkName":"mdurirpressreleasebasa11.jpg","type":"GRAPHIC","id":"NTFILE9sjfFQupAckjzij2","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":"2019-07-30 00:00","pubTimestamp":1564416000,"title_zh":"Current report, items 2.02, 7.01, and 9.01","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0}],"pageSize":20,"totalPage":11,"pageCount":8,"totalSize":203,"code":"91000000","status":"200"}]}}