CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Total	Common stock:	Additional paid-in capital:	Accumulated (losses) earnings:	Treasury stock:	Accumulated other comprehensive (loss):
Beginning balance at Dec. 31, 2009		$ 939	$ 651,348	$ 18,180	$ (48,125)	$ (2,584)
Change in the number of shares of Class A common stock outstanding
Issuance of Class A common stock in connection with employee stock purchase plan		1	664
Net Issuance and Redemption of Class A common stock in connection with stock options, restricted stock units and warrants		35	913
Purchases of Class A common stock		0			26,335
Repurchase of stock options			(772)
Stock-based compensation			22,807
Tax effect from employee stock options and restricted stock units			(4,024)
Deferred compensation			3,755
Comprehensive income (loss):
Net loss	(149,201)			(149,201)
Other comprehensive (loss) income
Other comprehensive income (loss)	(14,943)					(14,943)
Ending balance at Dec. 31, 2010	452,658	975	674,691	(131,021)	(74,460)	(17,527)
Change in the number of shares of Class A common stock outstanding
Issuance of Class A common stock in connection with employee stock purchase plan		1	611
Net Issuance and Redemption of Class A common stock in connection with stock options, restricted stock units and warrants		6	(2,971)
Purchases of Class A common stock		0			0
Repurchase of stock options			0
Stock-based compensation			21,538
Tax effect from employee stock options and restricted stock units			(435)
Deferred compensation			166
Comprehensive income (loss):
Net loss	(12,570)			(12,570)
Other comprehensive (loss) income
Other comprehensive income (loss)	(15,290)					(15,290)
Ending balance at Dec. 31, 2011	443,714	982	693,600	(143,591)	(74,460)	(32,817)
Change in the number of shares of Class A common stock outstanding
Issuance of Class A common stock in connection with employee stock purchase plan		1	622
Net Issuance and Redemption of Class A common stock in connection with stock options, restricted stock units and warrants		10	(4,292)
Purchases of Class A common stock		0			68,457
Repurchase of stock options			0
Stock-based compensation			24,159
Tax effect from employee stock options and restricted stock units			(1,538)
Deferred compensation			3,359
Comprehensive income (loss):
Net loss	(62,627)			(62,627)
Other comprehensive (loss) income
Other comprehensive income (loss)	29,840					29,840
Ending balance at Dec. 31, 2012	$ 364,791	$ 993	$ 715,910	$ (206,218)	$ (142,917)	$ (2,977)