Consolidated Condensed Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current Assets
Cash and cash equivalents	$ 61,306	$ 9,541
Accounts receivable
Allowance for doubtful accounts	(7,744)	(12,946)
Accounts receivable, net of allowance for doubtful accounts of $6,848 at June 30, 2012, and $12,946 at December 31, 2011	247,095	231,925
Inventories
Storage gas inventory	35,650	44,047
Materials and supplies	36,089	26,420
Liquified natural gas in storage	3,689	3,545
Regulatory asset	60,485	57,143
Income tax receivable	2,942	7,343
Deferred income taxes	12,546	48,818
Prepayments and other	11,647	15,386
Total current assets	471,449	444,168
Property, Plant and Equipment
Oil and gas properties, successful efforts method	5,796,145	5,166,368
Less accumulated depreciation, depletion and amortization	1,576,618	1,382,526
Oil and gas properties, net	4,219,527	3,783,842
Utility plant	1,383,563	1,358,266
Less accumulated depreciation	557,137	544,838
Utility plant, net	826,426	813,428
Other property, net	23,914	23,506
Total property, plant and equipment, net	5,069,867	4,620,776
Other Assets
Regulatory asset	89,785	95,633
Long-term derivative instruments	103,273	31,056
Deferred charges and other	45,166	45,783
Total other assets	238,224	172,472
TOTAL ASSETS	5,779,540	5,237,416
Current Liabilities
Long-term debt due within one year	1,000	1,000
Notes payable to banks	310,000	15,000
Accounts payable	252,586	302,048
Affiliated Companies		0
Accrued taxes	74,158	32,359
Customers' deposits	24,117	23,950
Amounts due customers	15,542	21,065
Accrued wages and benefits	22,799	35,258
Regulatory liability	28,497	58,279
Royalty payable	30,570	22,592
Other	30,292	32,328
Total current liabilities	789,561	543,879
Long-term debt	1,153,599	1,153,700
Deferred Credits and Other Liabilities
Asset retirement obligation	112,793	107,340
Pension and other postretirement liabilities	64,352	62,532
Regulatory liability	77,144	87,234
Long-term derivative instruments	1,624	34,663
Deferred income taxes	877,749	806,127
Other	10,174	9,778
Total deferred credits and other liabilities	1,143,836	1,107,674
Commitments and Contingencies
Shareholders' Equity
Preferred stock, cumulative $0.01 par value	0	0
Common shareholders' equity
Common stock, $0.01 par value	750	750
Premium on capital stock	489,584	482,918
Capital surplus	2,802	2,802
Retained earnings	2,269,385	2,100,885
Accumulated other comprehensive loss, net of tax
Unrealized gain (loss) on hedges, net	93,893	9,273
Pension and postretirement plans	(36,848)	(38,584)
Interest rate swap	(1,963)	(941)
Deferred compensation plan	3,632	3,511
Treasury stock, at cost; 3,037,234 shares at June 30, 2012, and 3,036,549 shares at December 31, 2011	(128,691)	(128,451)
Total shareholders' equity	2,692,544	2,432,163
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	5,779,540	5,237,416
Alabama Gas Corporation
Current Assets
Cash and cash equivalents	15,927	7,817
Accounts receivable
Gas	37,855	96,812
Other	5,058	6,858
Affiliated companies	0	2,841
Allowance for doubtful accounts	(6,000)	(12,100)
Inventories
Storage gas inventory	35,650	44,047
Materials and supplies	4,962	4,183
Liquified natural gas in storage	3,689	3,545
Regulatory asset	60,485	57,143
Income tax receivable	1,904	9,762
Deferred income taxes	20,876	21,986
Prepayments and other	1,736	4,422
Total current assets	182,142	247,316
Property, Plant and Equipment
Utility plant	1,383,563	1,358,266
Less accumulated depreciation	557,137	544,838
Utility plant, net	826,426	813,428
Other property, net	42	43
Other Assets
Regulatory asset	89,785	95,633
Deferred charges and other	9,833	10,380
Total other assets	99,618	106,013
TOTAL ASSETS	1,108,228	1,166,800
Current Liabilities
Notes payable to banks	0	15,000
Accounts payable	59,678	110,552
Affiliated Companies	14,304
Accrued taxes	36,065	26,861
Customers' deposits	24,117	23,950
Amounts due customers	15,542	21,065
Accrued wages and benefits	8,920	12,971
Regulatory liability	28,497	58,279
Other	10,256	9,250
Total current liabilities	197,379	277,928
Long-term debt	250,123	250,246
Deferred Credits and Other Liabilities
Pension and other postretirement liabilities	22,522	21,383
Regulatory liability	77,144	87,234
Long-term derivative instruments	0	3,070
Deferred income taxes	186,548	181,492
Other	634	709
Total deferred credits and other liabilities	286,848	293,888
Commitments and Contingencies
Shareholders' Equity
Preferred stock, cumulative $0.01 par value	0	0
Common shareholders' equity
Common stock, $0.01 par value	20	20
Premium on capital stock	31,682	31,682
Capital surplus	2,802	2,802
Retained earnings	339,374	310,234
Accumulated other comprehensive loss, net of tax
Total shareholders' equity	373,878	344,738
Total capitalization	624,001	594,984
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 1,108,228	$ 1,166,800