SEC Seal
SEC Banner
Search the Next-Generation EDGAR System
Filing Detail
Form 10-Q - Quarterly report [Sections 13 or 15(d)]:
SEC Accession No. 0000067716-20-000044
Filing Date
2020-08-06
Accepted
2020-08-06 09:12:09
Documents
100
Period of Report
2020-06-30

Document Format Files

Seq Description Document Type Size
1 MDU RESOURCES FORM 10-Q 06-30-2020 mdu-20200630.htm   iXBRL 10-Q 3893562
2 MDU RESOURCES CERTIFICATION OF CHIEF EXECUTIVE OFFICER a2020q2ex31a.htm EX-31.A 10571
3 MDU RESOURCES CERTIFICATION OF CHIEF FINANCIAL OFFICER a2020q2ex31b.htm EX-31.B 10154
4 MDU RESOURCES CERTIFICATION OF CEO AND CFO a2020q2ex32.htm EX-32 6224
5 MDU RESOURCES MINE SAFETY DISCLOSURES a2020q2ex95.htm EX-95 186864
  Complete submission text file 0000067716-20-000044.txt   15593515

Data Files

Seq Description Document Type Size
6 XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT mdu-20200630.xsd EX-101.SCH 53687
7 XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT mdu-20200630_cal.xml EX-101.CAL 100599
8 XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT mdu-20200630_def.xml EX-101.DEF 413795
9 XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT mdu-20200630_lab.xml EX-101.LAB 726716
10 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT mdu-20200630_pre.xml EX-101.PRE 500519
11 EXTRACTED XBRL INSTANCE DOCUMENT mdu-20200630_htm.xml XML 3973077
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.: 201080167
SIC: 1400 Mining & Quarrying of Nonmetallic Minerals (No Fuels)