# Filing Detail

Form 10-Q - Quarterly report [Sections 13 or 15(d)]:
SEC Accession No. 0000067716-12-000049
Filing Date
2012-05-04
Accepted
2012-05-04 10:00:11
Documents
13
Period of Report
2012-03-31

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | MDU RESOURCES GROUP, INC. 1ST QUARTER FORM 10-Q | mdu-3312012_10q.htm | 10-Q | 1239629
2 | MDUR EXECUTIVE INCENTIVE COMPENSATION PLAN, AS AMENDED 3/1/12, AND RULES & REGUL | mdu-3312012_ex10a.htm | EX-10.A | 94838
3 | COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES AND COMBINED FIXED CHARGES AND | mdu-3312012_ex12.htm | EX-12 | 36846
4 | CERTIFICATION OF CEO - SEC 302 SOX ACT 2002 | mdu-3312012_ex31a.htm | EX-31.A | 10474
5 | CERTIFICATION OF CFO - SEC 302 SOX ACT 2002 | mdu-3312012_ex31b.htm | EX-31.B | 9613
6 | CERTIFICATION OF CEO AND CFO - 18 USC SEC 1350 - SEC 906 SOX ACT 2002 | mdu-3312012_ex32.htm | EX-32 | 7198
7 | MINE SAFETY DISCLOSURES | mdu-3312012_ex95.htm | EX-95 | 138343
| Complete submission text file | 0000067716-12-000049.txt |  | 8409009

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
8 | XBRL INSTANCE DOCUMENT | mdu-20120331.xml | EX-101.INS | 1469321
9 | XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | mdu-20120331.xsd | EX-101.SCH | 53693
10 | XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT | mdu-20120331_cal.xml | EX-101.CAL | 73998
11 | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT | mdu-20120331_lab.xml | EX-101.LAB | 637193
12 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT | mdu-20120331_pre.xml | EX-101.PRE | 307370
13 | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT | mdu-20120331_def.xml | EX-101.DEF | 224637

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)

EIN.: 410423660 | State of Incorp.: DE | Fiscal Year End: 1231
Type: 10-Q | Act: 34 | File No.: 001-03480 | Film No.: 12812217
SIC: 1400 Mining & Quarrying of Nonmetallic Minerals (No Fuels)