Annual report pursuant to Section 13 and 15(d)

Schedule I - Condensed Financial Information of Registrant - Condensed Statements of Operations (Details)

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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