Consolidated Statements Of Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Deferred Stock Units [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]	Total
Balance, value at Dec. 31, 2012	$ 10,016	$ 757,214	$ 4,630	$ 1,305,593	$ 15,954	$ (1,457,184)	$ 34	$ 636,257
Balance, shares at Dec. 31, 2012	100,160,000
Comprehensive Income:
Net income (loss)				187,800			(6)	187,794
Other comprehensive loss, net					(2,332)			(2,332)
Repurchases of common stock						(372,194)		(372,194)
Common stock issued under stock plans, including excess tax benefit, value	$ 103	51,861	(38)					51,926
Common stock issued under stock plans, including excess tax benefit, shares	1,028,000
Deferred stock units activity		(259)	448					189
Share-based compensation cost		16,504	70					16,574
Balance, value at Dec. 31, 2013	$ 10,119	825,320	5,110	1,493,393	13,622	(1,829,378)	28	518,214
Balance, shares at Dec. 31, 2013	101,188,000
Comprehensive Income:
Net income (loss)				181,906			45	181,951
Other comprehensive loss, net					(21,693)			(21,693)
Repurchases of common stock						(623,888)		(623,888)
Common stock issued under stock plans, including excess tax benefit, value	$ 76	45,162						45,238
Common stock issued under stock plans, including excess tax benefit, shares	759,000
Deferred stock units activity		(218)	(114)					(332)
Share-based compensation cost		18,029	70					18,099
Balance, value at Dec. 31, 2014	$ 10,195	888,293	5,066	1,675,299	(8,071)	(2,453,266)	73	$ 117,589
Balance, shares at Dec. 31, 2014	101,947,000							101,947,000
Comprehensive Income:
Net income (loss)				192,078			57	$ 192,135
Other comprehensive loss, net					(34,194)			(34,194)
Repurchases of common stock						(412,172)		(412,172)
Stock split enacted through stock dividend				(1,518,264)		1,518,264
Shares retired, value				(30,757)		30,757
Shares retired, shares	(346,000)
Common stock issued under stock plans, including excess tax benefit, value	$ 63	32,700						32,763
Common stock issued under stock plans, including excess tax benefit, shares	636,000
Deferred stock units activity		(258)	258
Share-based compensation cost		19,799	85					19,884
Balance, value at Dec. 31, 2015	$ 10,258	$ 940,534	$ 5,409	$ 318,356	$ (42,265)	$ (1,316,417)	$ 130	$ (83,995)
Balance, shares at Dec. 31, 2015	102,237,000							102,237,000