# Filing Detail

Form 10-Q - Quarterly report [Sections 13 or 15(d)]:
SEC Accession No. 0000067716-12-000088
Filing Date
2012-11-07
Accepted
2012-11-07 09:19:37
Documents
17
Period of Report
2012-09-30

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | MDU RESOURCES GROUP, INC. 3RD QUARTER 2012 FORM 10-Q | mduform10-q9302012.htm | 10-Q | 1583274
2 | COMPANY BYLAWS, 8/16/12 | exhibit3.htm | EX-3 | 156861
3 | FIRST AMENDMENT TO CREDIT AGREEMENT, 10/4/12 | exhibit4.htm | EX-4 | 144476
4 | INSTRUMENT OF AMENDMENT TO THE MDUR 401(K) RETIREMENT PLAN, DATED 8/29/12 | exhibit10a.htm | EX-10.A | 23552
5 | INSTRUMENT OF AMENDMENT TO THE MDUR 401(K) RETIREMENT PLAN, DATED 8/29/12 | exhibit10b.htm | EX-10.B | 22169
6 | FORM OF AGREEMENT FOR TERMINATION OF CHANGE OF CONTROL EMPLOYMENT AGREEMENT, EFF | exhibit10c.htm | EX-10.C | 7758
7 | COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES AND COMBINED FIXED CHARGES AND | exhibit12.htm | EX-12 | 36856
8 | CERTIFICATION OF CEO - SEC 302 SOX ACT 2002 | exhibit31a.htm | EX-31.A | 10472
9 | CERTIFICATION OF CFO - SEC 302 SOX ACT 2002 | exhibit31b.htm | EX-31.B | 9611
10 | CERTIFICATION OF CEO AND CFO - 18 USC SEC 1350 - SEC 906 SOX ACT 2002 | exhibit32.htm | EX-32 | 7103
11 | MINE SAFETY DISCLOSURES | exhibit95.htm | EX-95 | 123472
| Complete submission text file | 0000067716-12-000088.txt |  | 9887478

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
12 | XBRL INSTANCE DOCUMENT | mdu-20120930.xml | EX-101.INS | 1699008
13 | XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | mdu-20120930.xsd | EX-101.SCH | 60276
14 | XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT | mdu-20120930_cal.xml | EX-101.CAL | 88084
15 | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT | mdu-20120930_lab.xml | EX-101.LAB | 701455
16 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT | mdu-20120930_pre.xml | EX-101.PRE | 337714
17 | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT | mdu-20120930_def.xml | EX-101.DEF | 248197

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.: 121185021
SIC: 1400 Mining & Quarrying of Nonmetallic Minerals (No Fuels)