Form 8-K - Current report:
SEC Accession No. 0000067716-21-000003
Filing Date
2021-02-03
Accepted
2021-02-03 16:56:35
Documents
16
Period of Report
2021-02-03
Items
Item 2.02: Results of Operations and Financial Condition
Item 7.01: Regulation FD Disclosure

Document Format Files

Seq Description Document Type Size
1 MDU RESOURCES GROUP, INC. FORM 8-K mdu-20210203.htm   iXBRL 8-K 31319
2 MDU RESOURCES GROUP, INC. EX 99 a2020earningsreleaseex-99.htm EX-99 587325
3 MDU RESOURCES GROUP, INC. LOGO mdurirpressreleasebasa171.jpg GRAPHIC 748436
  Complete submission text file 0000067716-21-000003.txt   1825984

Data Files

Seq Description Document Type Size
4 XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT mdu-20210203.xsd EX-101.SCH 2416
5 XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT mdu-20210203_cal.xml EX-101.CAL 711
6 XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT mdu-20210203_def.xml EX-101.DEF 14946
7 XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT mdu-20210203_lab.xml EX-101.LAB 29024
8 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT mdu-20210203_pre.xml EX-101.PRE 15562
9 EXTRACTED XBRL INSTANCE DOCUMENT mdu-20210203_htm.xml XML 11211
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)

EIN.: 301133956 | Fiscal Year End: 1231
Type: 8-K | Act: 34 | File No.: 001-03480 | Film No.: 21586964
SIC: 1400 Mining & Quarrying of Nonmetallic Minerals (No Fuels)