Consolidated Statements of Operations (Unaudited) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Consolidated Statements of Operations [Abstract]
Revenues	$ 170,755	$ 163,739	$ 337,062	$ 323,639
Costs and expenses:
Service costs (exclusive of depreciation and amortization)	74,455	73,243	151,016	144,503
Selling, general and administrative expenses	28,652	27,322	56,193	53,736
Management fee expense	2,847	3,046	5,928	6,015
Depreciation and amortization	29,341	27,309	58,573	54,210
Operating income	35,460	32,819	65,352	65,175
Interest expense, net	(24,424)	(23,585)	(49,435)	(45,430)
Loss on derivatives, net	(8,830)	(14,423)	(1,128)	(20,884)
Loss on early extinguishment of debt		(1,234)		(1,234)
Investment income from affiliate	4,500	4,500	9,000	9,000
Other expense, net	(535)	(666)	(1,091)	(1,418)
Net income (loss)	$ 6,171	$ (2,589)	$ 22,698	$ 5,209