Consolidated Statements Of Stockholders' Equity (USD $) In Thousands	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2013	$ 63	$ (247,106)	$ 598,724	$ (9,341)	$ 254,735	$ 597,075
Balance, shares at Dec. 31, 2013	62,802	(13,770)
Comprehensive income (loss)				735	(64,980)	(64,245)
Issuances of common stock			1,535			1,535
Issuances of common stock, shares	94
Tax benefits on stock options exercised and restricted stock units vested			1,929			1,929
Vesting of restricted stock and restricted stock units, net of forfeitures and tax withholdings		(817)	(3,573)			(4,390)
Vesting of restricted stock and restricted stock units, net of forfeitures and tax withholdings, shares	630	(44)
Share-based compensation expense		(172)	5,408			5,236
Share-based compensation expense, shares	10	(10)
Additional paid-in capital recorded through compensation expense			2,583			2,583
Repurchases of common stock		(14,427)				(14,427)
Repurchases of common stock, shares		(814)
Balance at Jun. 30, 2014	$ 63	$ (262,522)	$ 606,606	$ (8,606)	$ 189,755	$ 525,296
Balance, shares at Jun. 30, 2014	63,536	(14,638)