Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Balance at Dec. 31, 2018	$ 855,514	$ 453	$ 276,504	$ 628,207	$ (24,650)	$ (25,000)
Balance (in shares) at Dec. 31, 2018		44,998
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	133,982			133,982
Translation adjustment, net of tax	885				885
Pension adjustment, net of tax	(1,064)				(1,064)
Stock-based compensation expense	9,325		9,325
Repurchase of common stock	(60,816)		0			(60,816)
Repurchase of common stock (in shares)		(972)
Retirement of common stock	0	$ (13)		(76,424)		76,437
Cash dividends declared on common stock	(40,258)			(40,258)
Shares issued from release of restricted stock units	(5,903)	$ 2	(5,905)
Shares issued from release of restricted stock units (in shares)		178
Common stock issued	292		292
Common stock issued (in shares)		5
Balance at Dec. 31, 2019	891,957	$ 442	280,216	645,507	(24,829)	(9,379)
Balance (in shares) at Dec. 31, 2019		44,209
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	187,000			187,000
Translation adjustment, net of tax	14,172				14,172
Pension adjustment, net of tax	(161)				(161)
Cash flow hedge adjustment, net of tax	390				390
Stock-based compensation expense	11,410		11,410
Repurchase of common stock	(76,189)		0			(76,189)
Repurchase of common stock (in shares)		(1,053)
Retirement of common stock	0	$ (10)		(72,048)		72,058
Cash dividends declared on common stock	(40,018)			(40,018)
Shares issued from release of restricted stock units	(7,959)	$ 1	(7,960)
Shares issued from release of restricted stock units (in shares)		166
Common stock issued	341		341
Common stock issued (in shares)		4
Balance at Dec. 31, 2020	$ 980,943	$ 433	284,007	720,441	(10,428)	(13,510)
Balance (in shares) at Dec. 31, 2020	43,326	43,326
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 266,447			266,447
Translation adjustment, net of tax	(7,313)				(7,313)
Pension adjustment, net of tax	404				404
Cash flow hedge adjustment, net of tax	(268)				(268)
Stock-based compensation expense	15,029		15,029
Repurchase of common stock	(24,125)		0			(24,125)
Repurchase of common stock (in shares)		(222)
Retirement of common stock	0	$ (3)		(37,632)		37,635
Cash dividends declared on common stock	(42,415)			(42,415)
Shares issued from release of restricted stock units	(5,395)	$ 2	(5,397)
Shares issued from release of restricted stock units (in shares)		106
Common stock issued	691		691
Common stock issued (in shares)		7
Balance at Dec. 31, 2021	$ 1,183,998	$ 432	$ 294,330	$ 906,841	$ (17,605)	$ 0
Balance (in shares) at Dec. 31, 2021	43,217	43,217