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	$ 219,758	$ 213,270	$ 435,415	$ 422,048
Costs and expenses:
Service costs (exclusive of depreciation and amortization)	89,125	88,461	179,111	174,820
Selling, general and administrative expenses	43,052	41,782	85,246	81,741
Management fee expense	3,663	3,968	7,660	7,843
Depreciation and amortization	35,876	31,790	71,089	62,659
Operating income	48,042	47,269	92,309	94,985
Interest expense, net	(28,228)	(28,365)	(55,652)	(56,200)
Loss on derivatives, net	(11,577)	(14,629)	(4,205)	(19,876)
Other expense, net	(374)	(468)	(1,182)	(955)
Net income	7,863	3,807	31,270	17,954
Dividend to preferred members	4,500	4,500	9,000	9,000
Net income (loss) applicable to preferred members	$ 3,363	$ (693)	$ 22,270	$ 8,954