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Filing Detail
Form 10-Q - Quarterly report [Sections 13 or 15(d)]:
SEC Accession No. 0000067716-21-000043
Filing Date
2021-08-05
Accepted
2021-08-05 09:12:44
Documents
102
Period of Report
2021-06-30

Document Format Files

Seq Description Document Type Size
1 MDU RESOURCES FORM 10-Q 6-30-2021 mdu-20210630.htm   iXBRL 10-Q 3324910
2 MDU RESOURCES DIRECTOR COMPENSATION POLICY 5-12-21 a2021ex10b.htm EX-10.B 20529
3 MDU RESOURCES CERTIFICATION OF CHIEF EXECUTIVE OFFICER a2021q2ex31a.htm EX-31.A 9314
4 MDU RESOURCES CERTIFICATION OF CHIEF FINANCIAL OFFICER a2021q2ex31b.htm EX-31.B 8927
5 MDU RESOURCES CERTIFICATION OF CEO AND CFO a2021q2ex32.htm EX-32 5447
6 MDU RESOURCES MINE SAFETY DISCLOSURES a2021q2ex95.htm EX-95 109657
  Complete submission text file 0000067716-21-000043.txt   13372998

Data Files

Seq Description Document Type Size
7 XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT mdu-20210630.xsd EX-101.SCH 55772
8 XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT mdu-20210630_cal.xml EX-101.CAL 78062
9 XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT mdu-20210630_def.xml EX-101.DEF 394508
10 XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT mdu-20210630_lab.xml EX-101.LAB 734607
11 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT mdu-20210630_pre.xml EX-101.PRE 501757
12 EXTRACTED XBRL INSTANCE DOCUMENT mdu-20210630_htm.xml XML 3184545
Mailing Address 1200 WEST CENTURY AVENUE BISMARCK ND 58503
Business Address 1200 WEST CENTURY AVENUE BISMARCK ND 58503 701-530-1000
MDU RESOURCES GROUP INC (Filer) CIK: 0000067716 (see all company filings)

IRS No.: 301133956 | Fiscal Year End: 1231
Type: 10-Q | Act: 34 | File No.: 001-03480 | Film No.: 211146608
SIC: 1400 Mining & Quarrying of Nonmetallic Minerals (No Fuels)