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Filing Detail
Form 10-Q - Quarterly report [Sections 13 or 15(d)]:
SEC Accession No. 0000067716-13-000050
Filing Date
2013-05-07
Accepted
2013-05-07 12:08:51
Documents
14
Period of Report
2013-03-31

Document Format Files

Seq Description Document Type Size
1 MDU RESOURCES GROUP, INC. 1ST QUARTER 2013 FORM 10-Q mdu-3312013x10q.htm 10-Q 1314573
2 COMPANY BYLAWS 03-2013 mdu3-31x2013q1bylawsex3.htm EX-3 167528
3 EXECUTIVE INCENTIVE COMPENSATION PLAN mdu-3313013q1ex10a.htm EX-10.A 90378
4 COMPUTATION OF RATIO OF EARNINGS mdu-03312013q1ex12.htm EX-12 39806
5 CERTIFICATION OF CEO - SEC 302 SOX ACT 2002 mdu-3312013q1ex31a.htm EX-31.A 10456
6 CERTIFICATION OF CFO - SEC 302 SOX ACT 2002 mdu-3312013q1ex31b.htm EX-31.B 9603
7 CERTIFICATION OF CEO AND CFO - 18 USC SEC 1350 - SEC 906 SOX ACT 2002 mdu-3312013q1ex32.htm EX-32 7081
8 MINE SAFETY DISCLOSURES mdu-3312013q1ex95.htm EX-95 101474
  Complete submission text file 0000067716-13-000050.txt   10145432

Data Files

Seq Description Document Type Size
9 XBRL INSTANCE DOCUMENT mdu-20130331.xml EX-101.INS 1774464
10 XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT mdu-20130331.xsd EX-101.SCH 62760
11 XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT mdu-20130331_cal.xml EX-101.CAL 90210
12 XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT mdu-20130331_lab.xml EX-101.LAB 749292
13 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT mdu-20130331_pre.xml EX-101.PRE 385648
14 XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT mdu-20130331_def.xml EX-101.DEF 302283
Mailing Address 1200 WEST CENTURY AVENUE BISMARCK ND 58503
Business Address 1200 WEST CENTURY AVENUE BISMARCK ND 58503 701-530-1059
MDU RESOURCES GROUP INC (Filer) CIK: 0000067716 (see all company filings)

IRS No.: 410423660 | State of Incorp.: DE | Fiscal Year End: 1231
Type: 10-Q | Act: 34 | File No.: 001-03480 | Film No.: 13818774
SIC: 1400 Mining & Quarrying of Nonmetallic Minerals (No Fuels)