CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Cash and cash equivalents	$ 10,177	$ 13,977
Accounts receivable, net	87,094	63,571
Prepaid expenses	5,731	6,969
Inventories	4,308	2,647
Other	6,025	2,313
Property and equipment, net	236,411	229,665
Goodwill	556,547	770,898
Intangible assets, net	42,393	85,236
Other assets	32,526	30,542
Accounts payable	27,748	21,888
Accrued expenses	42,596	35,765
Income taxes payable	5,310	5,994
Other long-term liabilities	22,659	15,981
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,025	1,025
Common stock, shares issued (in shares)	1,025	1,000
Common stock, shares outstanding (in shares)	1,025	1,000
Variable Interest Entities (VIEs)
Cash and cash equivalents	2,922	4,981
Accounts receivable, net	17,934	19,670
Prepaid expenses	414	376
Inventories	168	17
Other	756	851
Property and equipment, net	22,910	22,069
Goodwill	18,879	13,190
Intangible assets, net	1,363	792
Other assets	8,106	9,159
Accounts payable	2,282	3,385
Accrued expenses	2,471	3,127
Income taxes payable	31	0
Other long-term liabilities	$ 1,874	$ 1,542