Consolidated Statements Of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common stock	Treasury Stock, Common	Additional paid-in capital	Retained earnings (deficit)	Foreign currency translation adjustments	Defined benefit pension adjustments
Balance	$ 1,012,025	$ 1,362	$ (7,112)	$ 837,658	$ 213,753	$ (32,776)	$ (860)
Balance (in shares) at Dec. 31, 2018		136,179
Shares issued under stock plans (in shares)		877
Shares issued under stock plans	(1,431)	$ 9	0	(1,440)	0	0	0
Share-based compensation expense	19,629	$ 0	$ 0	19,629	0	0	0
Repurchase and retirement of common stock (in shares)		(2,126)	0
Repurchase and retirement of common stock	(74,787)	$ (22)	$ 0	(13,084)	(61,681)
Dividends, Common Stock, Cash	(40,784)	0	0	21	(40,805)	0	0
Pension liability adjustment	69	0	0	0	0	0	69
Foreign currency translation	(3,692)	0	0	0	0	(3,692)	0
Net income	254,860	$ 0	$ 0	0	254,860	0	0
Balance (in shares) at Dec. 31, 2019		134,930	202
Balance	1,165,889	$ 1,349	$ (7,112)	842,784	366,127	(36,468)	(791)
Shares issued under stock plans (in shares)		997
Shares issued under stock plans	(16,062)	$ 10	0	(16,072)	0	0	0
Share-based compensation expense	22,920	$ 0	0	22,920	0	0	0
Repurchase and retirement of common stock (in shares)		(778)
Repurchase and retirement of common stock	(44,563)	$ (8)	0	(4,820)	(39,735)	0
Dividends, Common Stock, Cash	(43,490)	0	0	38	(43,528)	0	0
Pension liability adjustment	(49)	0	0	0	0	0	(49)
Foreign currency translation	(120)	0	0	0	0	(120)	0
Net income	294,969	$ 0	$ 0	0	294,969	0	0
Balance (in shares) at Dec. 31, 2020		135,149	202
Balance	1,379,494	$ 1,351	$ (7,112)	844,850	577,833	(36,588)	(840)
Shares issued under stock plans (in shares)		1,133
Shares issued under stock plans	8,654	$ 11	0	8,643	0	0	0
Share-based compensation expense	29,884	$ 0	0	29,884	0	0	0
Repurchase and retirement of common stock (in shares)		(563)
Repurchase and retirement of common stock	(67,109)	$ (5)	0	(3,547)	(63,557)	0
Dividends, Common Stock, Cash	(43,611)	0	0	15	(43,626)	0	0
Pension liability adjustment	(382)	0	0	0	0	0	(382)
Foreign currency translation	(2,275)	0	0	0	0	(2,275)	0
Net income	409,126	$ 0	$ 0	0	409,126	0	0
Balance (in shares) at Dec. 31, 2021		135,719	202
Balance	$ 1,713,781	$ 1,357	$ (7,112)	$ 879,845	$ 879,776	$ (38,863)	$ (1,222)