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Filing Detail
Form 10-Q - Quarterly report [Sections 13 or 15(d)]:
SEC Accession No. 0000067716-20-000053
Filing Date
2020-11-05
Accepted
2020-11-05 09:20:47
Documents
103
Period of Report
2020-09-30

Document Format Files

Seq Description Document Type Size
1 MDU RESOURCES FORM 10-Q 9-30-2020 mdu-20200930.htm   iXBRL 10-Q 3198782
2 MDU RESOURCES CERTIFICATION OF CHIEF EXECUTIVE OFFICER a2020q3ex31a.htm EX-31.A 9316
3 MDU RESOURCES CERTIFICATION OF CHIEF FINANCIAL OFFICER a2020q3ex31b.htm EX-31.B 8940
4 MDU RESOURCES CERTIFICATION OF CEO AND CFO a2020q3ex32.htm EX-32 5476
5 MDU RESOURCES MINE SAFETY DISCLOSURES a2020q3ex95.htm EX-95 143438
  Complete submission text file 0000067716-20-000053.txt   13475889

Data Files

Seq Description Document Type Size
6 XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT mdu-20200930.xsd EX-101.SCH 57748
7 XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT mdu-20200930_cal.xml EX-101.CAL 99913
8 XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT mdu-20200930_def.xml EX-101.DEF 441582
9 XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT mdu-20200930_lab.xml EX-101.LAB 752216
10 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT mdu-20200930_pre.xml EX-101.PRE 529169
11 EXTRACTED XBRL INSTANCE DOCUMENT mdu-20200930_htm.xml XML 3208328
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.: 201289048
SIC: 1400 Mining & Quarrying of Nonmetallic Minerals (No Fuels)