CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Condensed Consolidated Statements Of Comprehensive Income (Loss)
Net income (loss)	$ 27,896	$ (19,050)	$ 42,629	$ (14,545)
Other comprehensive income (loss):
Interest rate swap gain (loss), net of reclassifications to earnings	5,429	(1,444)	6,618	(1,818)
Amortization of terminated interest rate swaps	672	298	767	614
Total other comprehensive income (loss)	6,101	(1,146)	7,385	(1,204)
Comprehensive income (loss)	$ 33,997	$ (20,196)	$ 50,014	$ (15,749)