CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock, at Cost	Non- controlling Interest
Beginning balance at Dec. 31, 2011	$ 509,662	$ 27	$ 546,608	$ 34,288	$ (959)	$ (78,152)	$ 7,850
Beginning balance, treasury shares at Dec. 31, 2011						4,417,000
Beginning balance, shares at Dec. 31, 2011		27,122,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	3,873		3,873
Exercise of restricted stock units	(1,687)		(1,020)			(667)
Exercise of restricted stock units, shares		94,000
Exercise of restricted stock units, treasury shares						30,000
Retirement of treasury stock		(1)	(22,870)			22,871
Retirement of treasury stock, shares		(1,409,000)				(1,409,000)
Shares purchased for deferred compensation accounts	(645)					(645)
Shares purchased for deferred compensation accounts, shares						35,000
Comprehensive loss:
Net loss	(31,652)			(29,073)			(2,579)
Other comprehensive loss, net of tax:
Unrealized gain (loss) on securities, net of deferred income tax and reclassification adjustments	(226)				(226)
Accumulated currency, net of tax	(829)				(829)
Ending balance at Dec. 31, 2012	478,496	26	526,591	5,215	(2,014)	(56,593)	5,271
Ending balance, treasury shares at Dec. 31, 2012						3,073,000
Ending balance, shares at Dec. 31, 2012		25,807,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Changes in ownership of noncontrolling interest	107,320		14,985				92,335
Stock-based compensation expense	5,977		4,731				1,246
Exercise of restricted stock units, shares		14,000
Comprehensive loss:
Net loss	(29,194)			(22,298)			(6,896)
Other comprehensive loss, net of tax:
Unrealized gain (loss) on securities, net of deferred income tax and reclassification adjustments	2,411				2,411
Accumulated currency, net of tax	(165)				(165)
Ending balance at Dec. 31, 2013	564,845	26	546,307	(17,083)	232	(56,593)	91,956
Ending balance, treasury shares at Dec. 31, 2013	3,073,000					3,073,000
Ending balance, shares at Dec. 31, 2013	22,747,000	25,821,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	7,093		5,228				1,865
Exercise of restricted stock units	(5,736)		(4,919)				(817)
Exercise of restricted stock units, shares		247,000
Retirement of treasury stock	0	(3)	(54,954)			54,957
Retirement of treasury stock, shares		(2,985,000)				(2,985,000)
Sale of treasury stock, shares						(10,000)
Sale of treasury stock	223					223
Contributions from noncontrolling interest	240
Comprehensive loss:
Net loss	(59,605)			(52,425)			(7,180)
Other comprehensive loss, net of tax:
Unrealized gain (loss) on securities, net of deferred income tax and reclassification adjustments	(2,093)				(2,093)
Accumulated currency, net of tax	6,578				6,578
Ending balance at Dec. 31, 2014	$ 511,545	$ 23	$ 491,662	$ (69,508)	$ 4,717	$ (1,413)	$ 86,064
Ending balance, treasury shares at Dec. 31, 2014	78,000					78,000
Ending balance, shares at Dec. 31, 2014	23,005,000	23,083,000