Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Deferred Stock Units	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock	Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of accounting changes	$ (12,648)				$ (12,648)
Beginning balance, adjusted	(66,490)	$ 10,428	$ 1,073,931	$ 5,988	790,897	$ (36,470)	$ (1,911,528)	$ 264
Balance beginning of period (in shares) at Dec. 31, 2017		104,275
Balance beginning of period at Dec. 31, 2017	(53,842)	$ 10,428	1,073,931	5,988	803,545	(36,470)	(1,911,528)	264
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	89,476				89,451			25
Other comprehensive income, net	2,264					2,264
Repurchases of common stock, net	(94,285)						(94,285)
Common stock issued under stock plans (in shares)		401
Common stock issued under stock plans	14,092	$ 40	14,311	(259)
Share-based compensation cost	5,960		5,917	43
Balance end of period (in shares) at Mar. 31, 2018		104,676
Balance end of period at Mar. 31, 2018	$ (48,983)	$ 10,468	1,094,159	5,772	880,348	(34,206)	(2,005,813)	289
Balance beginning of period (in shares) at Dec. 31, 2018	105,087	105,087
Balance beginning of period at Dec. 31, 2018	$ (9,233)	$ 10,509	1,138,216	4,524	1,167,928	(41,791)	(2,288,899)	280
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	102,709				102,681			28
Other comprehensive income, net	1,776					1,776
Repurchases of common stock, net	(61,135)						(61,135)
Common stock issued under stock plans (in shares)		258
Common stock issued under stock plans	11,419	$ 26	11,393
Share-based compensation cost	$ 6,334		6,266	68
Balance end of period (in shares) at Mar. 31, 2019	105,345	105,345
Balance end of period at Mar. 31, 2019	$ 51,870	$ 10,535	$ 1,155,875	$ 4,592	$ 1,270,609	$ (40,015)	$ (2,350,034)	$ 308