Summarized Quarterly Financial Information (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2011

Summarized Quarterly Financial Information [Abstract]

Schedule Of Quarterly Financial Information Table Text Block

15. SUMMARIZED QUARTERLY FINANCIAL INFORMATION (UNAUDITED):

		2011
		1st Quarter		2nd Quarter		3rd Quarter		4th Quarter		Total
Revenues from continuing operations	$	257,290	$	280,567	$	293,141	$	270,798	$	1,101,796
Gain on commodity derivatives		15,635		47,606		114,166		136,325		313,732
Expenses from continuing operations		145,666		151,365		160,543		184,458		642,032
Interest expense		14,590		15,590		15,902		17,074		63,156
Other income (expense), net		20		(4)		(3)		519		532
Income before income tax provision		112,689		161,214		230,859		206,110		710,872
Income tax provision		43,969		57,709		81,713		74,279		257,670
Net income	$	68,720	$	103,505	$	149,146	$	131,831	$	453,202
Net income per common share - basic	$	0.45	$	0.68	$	0.98	$	0.86	$	2.97
Net income per common share - fully diluted	$	0.44	$	0.67	$	0.97	$	0.86	$	2.94
		2010
		1st Quarter		2nd Quarter		3rd Quarter		4th Quarter		Total
Revenues from continuing operations	$	273,124	$	228,388	$	240,374	$	237,500	$	979,386
Gain (loss) on commodity derivatives		181,351		14,566		150,186		(20,651)		325,452
Expenses from continuing operations		124,260		125,999		128,489		144,342		523,090
Interest expense		11,718		11,437		11,382		14,495		49,032
Litigation expense		-		9,902		-		-		9,902
Other (expense) income , net		151		22		12		75		260
Income before income tax provision		318,648		95,638		250,701		58,087		723,074
Income tax provision		116,272		34,145		88,059		20,139		258,615
Net income	$	202,376	$	61,493	$	162,642	$	37,948	$	464,459
Net income per common share - basic	$	1.33	$	0.40	$	1.07	$	0.25	$	3.05
Net income per common share - fully diluted	$	1.31	$	0.40	$	1.05	$	0.25	$	3.01