Consolidated Statements Of Stockholders' Equity (Deficit) (USD $) In Thousands, except Share data	Common Stock [Member]	Subscription Receivable [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Loss, Net [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]	Non-Controlling Interests [Member]	Total
Balance at Dec. 31, 2008	$ 4	$ (34)	$ 194,101	$ (64,025)	$ (102,199)	$ (48,221)	$ 624	$ (19,750)
Balance, shares at Dec. 31, 2008	40,637,000
Repayment of subscriptions		34						34
Issuance / (Redemption) of capital stock			1,595			(458)		1,137
Issuance / (Redemption) of capital stock, shares	264,000
Stock-based compensation charges			4,627					4,627
Unrealized losses on interest rate swaps, net of income taxes				(1,046)				(1,046)
Net income attributable to controlling interests					5,277			5,277
Net income (loss) attributable to noncontrolling interests							494	494
Foreign currency translation adjustments				7,453			(42)	7,411
Contributions from noncontrolling interest partner							526	526
Balance at Dec. 31, 2009	4		200,323	(57,618)	(96,922)	(48,679)	1,602	(1,290)
Balance, shares at Dec. 31, 2009	40,901,000
Issuance / (Redemption) of capital stock			7,391			(1,672)		5,719
Issuance / (Redemption) of capital stock, shares	1,932,000
Stock-based compensation charges			6,040					6,040
Unrealized losses on interest rate swaps, net of income taxes				(5,286)				(5,286)
Net income attributable to controlling interests					40,959			40,959	[1]
Net income (loss) attributable to noncontrolling interests							174	174
Foreign currency translation adjustments				(2,149)			87	(2,062)
Balance at Dec. 31, 2010	4		213,754	(65,053)	(55,963)	(50,351)	1,863	44,254
Balance, shares at Dec. 31, 2010	42,833,000							42,833,342
Issuance / (Redemption) of capital stock			11,640			(3,149)		8,491
Issuance / (Redemption) of capital stock, shares	1,166,000
Stock-based compensation charges			9,322					9,322
Unrealized losses on interest rate swaps, net of income taxes				(18,283)				(18,283)
Net income attributable to controlling interests					70,233			70,233	[2]
Net income (loss) attributable to noncontrolling interests							(87)	(87)
Foreign currency translation adjustments				(566)			(219)	(785)
Balance at Dec. 31, 2011	$ 4		$ 234,716	$ (83,902)	$ 14,270	$ (53,500)	$ 1,557	$ 113,145
Balance, shares at Dec. 31, 2011	43,999,000							43,999,443

[1] Includes release of $23.7 million and $3.5 million in previously-recognized valuation allowances related to the Company's United States segment for the quarters ended September 30 and December 31, respectively. Additionally, the quarter ended September 30 includes pre-tax charges of approximately $14.5 million related to certain charges associated with the refinancing of the Company's outstanding debt obligations.

[2] Includes $37.0 million of tax benefit recorded in the quarter ended September 30 as a result of a tax reporting change with respect to the Company's U.K. operations.