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Filing Detail
Form 10-Q - Quarterly report [Sections 13 or 15(d)]:
SEC Accession No. 0000067716-21-000055
Filing Date
2021-11-04
Accepted
2021-11-04 09:57:55
Documents
103
Period of Report
2021-09-30

Document Format Files

Seq Description Document Type Size
1 MDU RESOURCES FORM 10-Q 09-30-2021 mdu-20210930.htm   iXBRL 10-Q 3496741
2 MDU RESOURCES DEFERRED COMPENSATION PLAN ADOPTION AGREEMENT a2021ex10c.htm EX-10.C 153620
3 MDU RESOURCES CERTIFICATION OF CHIEF EXECUTIVE OFFICER a2021q3ex31a.htm EX-31.A 9316
4 MDU RESOURCES CERTIFICATION OF CHIEF FINANCIAL OFFICER a2021q3ex31b.htm EX-31.B 8929
5 MDU RESOURCES CERTIFICATION OF CEO AND CFO a2021q3ex32.htm EX-32 5454
6 MDU RESOURCES MINE SAFETY DISCLOSURES a2021q3ex95.htm EX-95 136369
  Complete submission text file 0000067716-21-000055.txt   13994556

Data Files

Seq Description Document Type Size
7 XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT mdu-20210930.xsd EX-101.SCH 55657
8 XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT mdu-20210930_cal.xml EX-101.CAL 78113
9 XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT mdu-20210930_def.xml EX-101.DEF 401820
10 XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT mdu-20210930_lab.xml EX-101.LAB 733692
11 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT mdu-20210930_pre.xml EX-101.PRE 507617
12 EXTRACTED XBRL INSTANCE DOCUMENT mdu-20210930_htm.xml XML 3345810
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.: 211378571
SIC: 1400 Mining & Quarrying of Nonmetallic Minerals (No Fuels)