Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2012

Supplemental Cash Flow Information [Line Items]

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]

Supplemental information concerning Energen's cash flow activities was as follows:

Years ended December 31, (in thousands)	2012		2011		2010
Interest paid, net of amount capitalized	$	61,379	$	33,601	$	37,517
Income taxes paid	$	17,170	$	9,432	$	83,894
Noncash investing activities:
Accrued development, exploration costs and other capital	$	120,024	$	72,030	$	75,167
Capitalized depreciation	$	80	$	93	$	116
Capitalized asset retirement obligations costs	$	4,409	$	4,927	$	4,194
Allowance for funds used during construction	$	623	$	807	$	808
Capital lease obligations	$	5,072	$	—	$	—
Noncash financing activities:
Issuance of common stock for employee benefit plans	$	838	$	822	$	5,765
Treasury stock acquired in connection with tax withholdings	$	277	$	713	$	2,894

Alabama Gas Corporation

Supplemental Cash Flow Information [Line Items]

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]

Supplemental information concerning Alagasco's cash flow activities was as follows:

Years ended December 31, (in thousands)	2012		2011		2010
Interest paid, net of amount capitalized	$	13,513	$	12,385	$	11,653
Income taxes paid	$	16,796	$	5,143	$	13,063
Interest on affiliated company debt, net	$	295	$	376	$	274
Noncash investing activities:
Accrued property, plant and equipment costs	$	3,536	$	2,229	$	2,592
Capitalized depreciation	$	80	$	93	$	116
Capitalized asset retirement obligations costs	$	415	$	300	$	161
Allowance for funds used during construction	$	623	$	807	$	808