CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net income	$ 24,889	$ 124,533	$ 51,225	$ 106,030
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax	(116)	3,951	(1,150)	4,878
Other Comprehensive Income (Loss), Net of Tax	(116)	3,951	(1,150)	4,878
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 24,773	$ 128,484	$ 50,075	$ 110,908