# Filing Detail

Form 10-Q - Quarterly report [Sections 13 or 15(d)]:
SEC Accession No. 0000067716-12-000071
Filing Date
2012-08-07
Accepted
2012-08-07 11:38:18
Documents
15
Period of Report
2012-06-30

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | MDU RESOURCES GROUP, INC. 2ND QUARTER 2012 FORM 10-Q | mduform10q.htm | 10-Q | 1537595
2 | CEHI CREDIT AGREEMENT DATED 6/8/12 | exhibit4.htm | EX-4 | 1139713
3 | MDUR NON-EMPLOYEE DIRECTOR LONG-TERM INCENTIVE COMP PLAN, AMENDED 5/17/12 | exhibit10a.htm | EX-10.A | 67325
4 | INSTRUMENT OF AMENDMENT TO THE MDUR 401(K) RETIREMENT PLAN, 5/24/12 | exhibit10b.htm | EX-10.B | 98663
5 | COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES AND COMBINED FIXED CHARGES AND | exhibit12.htm | EX-12 | 36838
6 | CERTIFICATION OF CEO - SEC 302 SOX ACT 2002 | exhibit31a.htm | EX-31.A | 10470
7 | CERTIFICATION OF CFO - SEC 302 SOX ACT 2002 | exhibit31b.htm | EX-31.B | 9609
8 | CERTIFICATION OF CEO AND CFO - 18 USC SEC 1350 - SEC 906 SOX ACT 2002 | exhibit32.htm | EX-32 | 7095
9 | MINE SAFETY DISCLOSURES | exhibit95.htm | EX-95 | 113843
| Complete submission text file | 0000067716-12-000071.txt |  | 10538680

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
10 | XBRL INSTANCE DOCUMENT | mdu-20120630.xml | EX-101.INS | 1681731
11 | XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | mdu-20120630.xsd | EX-101.SCH | 54713
12 | XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT | mdu-20120630_cal.xml | EX-101.CAL | 82285
13 | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT | mdu-20120630_lab.xml | EX-101.LAB | 649336
14 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT | mdu-20120630_pre.xml | EX-101.PRE | 313011
15 | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT | mdu-20120630_def.xml | EX-101.DEF | 228721

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.: 121011991
SIC: 1400 Mining & Quarrying of Nonmetallic Minerals (No Fuels)