CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]	Non-Controlling Interests [Member]
Balance at Dec. 31, 2010	$ (55,911)	$ 1,066	$ 871,963	$ (922,630)	$ (19,633)	$ 13,323
Balance (in shares) at Dec. 31, 2010		106,573,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	74,558			68,895		5,663
Foreign currency translation adjustment	7,144				7,144
Share-based compensation, value	1,357		1,357
Issuance of notes receivable due from stockholders	(985)		(985)
Distributions to noncontrolling interests	(7,558)		(38)			(7,520)
Contributions from noncontrolling interests	26					26
Balance at Jun. 30, 2011	18,631	1,066	872,297	(853,735)	(12,489)	11,492
Balance (in shares) at Jun. 30, 2011		106,573,000
Balance at Dec. 31, 2011	40,297	1,066	874,753	(822,625)	(22,344)	9,447
Balance (in shares) at Dec. 31, 2011	106,573,193	106,573,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	74,396			67,439		6,957
Foreign currency translation adjustment	(3,513)				(3,513)
Stock-based compensation, shares		261,000
Stock-based compensation, value	1,463	3	1,460
Repurchase of common stock, shares		(56,000)
Repurchase of common stock, value	(116)	(1)	316	(431)
Issuance of notes receivable due from stockholders	(518)		(518)
Repayments of notes receivable due from stockholders	1,463		1,463
Distributions to noncontrolling interests	(8,409)					(8,409)
Contributions from noncontrolling interests	378					378
Balance at Jun. 30, 2012	$ 105,441	$ 1,068	$ 877,474	$ (755,617)	$ (25,857)	$ 8,373
Balance (in shares) at Jun. 30, 2012	106,777,584	106,778,000