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Filing Detail
Form 8-K - Current report:
SEC Accession No. 0000067716-21-000048
Filing Date
2021-08-16
Accepted
2021-08-16 09:47:22
Documents
13
Period of Report
2021-08-10
Items
Item 1.04: Mine Safety - Reporting of Shutdowns and Patterns of Violations
Item 9.01: Financial Statements and Exhibits

Document Format Files

Seq Description Document Type Size
1 8-K mdu-20210810.htm   iXBRL 8-K 32264
  Complete submission text file 0000067716-21-000048.txt   200128

Data Files

Seq Description Document Type Size
2 XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT mdu-20210810.xsd EX-101.SCH 2149
3 XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT mdu-20210810_def.xml EX-101.DEF 14930
4 XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT mdu-20210810_lab.xml EX-101.LAB 29024
5 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT mdu-20210810_pre.xml EX-101.PRE 15550
6 EXTRACTED XBRL INSTANCE DOCUMENT mdu-20210810_htm.xml XML 11224
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: 8-K | Act: 34 | File No.: 001-03480 | Film No.: 211175023
SIC: 1400 Mining & Quarrying of Nonmetallic Minerals (No Fuels)