Schedule I - Condensed Financial Information of Registrant - Condensed Statements of Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Condensed Financial Statements, Captions [Line Items]
Revenues	$ 67,300	$ 66,308	$ 61,396	$ 69,323	$ 70,824	$ 64,907	$ 73,609	$ 74,450	$ 264,327	$ 283,790	$ 399,282
Operating costs and expenses									35,457	21,827	27,069
Interest expense, net									171,646	173,590	174,016
Net income (loss)	(63,521)	(42,422)	(24,861)	(19,332)	(7,463)	(14,479)	(6,868)	(2,209)	(150,136)	(31,019)	107,568
Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Revenues									0	0	0
Operating costs and expenses									18,262	13,104	14,723
Loss from operations									(18,262)	(13,104)	(14,723)
Interest expense, net									12	0	0
Interest income									235	38	51
Equity income (loss) of affiliates									(132,121)	(17,953)	122,240
Net income (loss)										$ (31,019)	$ 107,568