Consolidated Statements of Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income/(Loss)	Treasury Stock
Beginning balance (in shares) at Dec. 31, 2020		38,968,052				(5,408,618)
Beginning balance at Dec. 31, 2020	$ 719,172	$ 39	$ 420,976	$ 641,379	$ (74,984)	$ (268,238)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued against stock-based compensation plans (in shares)		315,801
Stock issued against stock-based compensation plans	173		173
Stock-based compensation	$ 17,902		17,902
Acquisition of treasury stock (in shares)	(600,076)					(625,526)
Acquisition of treasury stock	$ (57,424)					$ (57,424)
Other comprehensive (loss)/income	(11,761)				(11,761)
Net income	59,952			59,952
Ending balance (in shares) at Jun. 30, 2021		39,283,853				(6,034,144)
Ending balance at Jun. 30, 2021	728,014	$ 39	439,051	701,331	(86,745)	$ (325,662)
Beginning balance (in shares) at Mar. 31, 2021		39,273,989				(5,747,100)
Beginning balance at Mar. 31, 2021	726,225	$ 39	428,882	673,310	(78,753)	$ (297,253)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued against stock-based compensation plans (in shares)		9,864
Stock issued against stock-based compensation plans	99		99
Stock-based compensation	$ 10,070		10,070
Acquisition of treasury stock (in shares)	(287,044)					(287,044)
Acquisition of treasury stock	$ (28,409)					$ (28,409)
Other comprehensive (loss)/income	(7,992)				(7,992)
Net income	28,021			28,021
Ending balance (in shares) at Jun. 30, 2021		39,283,853				(6,034,144)
Ending balance at Jun. 30, 2021	$ 728,014	$ 39	439,051	701,331	(86,745)	$ (325,662)
Beginning balance (in shares) at Dec. 31, 2021	33,291,482	39,508,340				(6,216,858)
Beginning balance at Dec. 31, 2021	$ 693,156	$ 40	395,742	756,137	(89,474)	$ (369,289)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued against stock-based compensation plans (in shares)		286,821
Stock issued against stock-based compensation plans	0		0
Stock-based compensation	$ 24,564		24,564
Acquisition of treasury stock (in shares)	(427,049)					(454,268)
Acquisition of treasury stock	$ (60,191)					$ (60,191)
Other comprehensive (loss)/income	(43,900)				(43,900)
Net income	$ 72,024			72,024
Ending balance (in shares) at Jun. 30, 2022	33,124,035	39,795,161				(6,671,126)
Ending balance at Jun. 30, 2022	$ 685,653	$ 40	420,306	828,161	(133,374)	$ (429,480)
Beginning balance (in shares) at Mar. 31, 2022		39,794,154				(6,465,410)
Beginning balance at Mar. 31, 2022	700,341	$ 40	406,966	792,315	(98,306)	$ (400,674)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued against stock-based compensation plans (in shares)		1,007
Stock issued against stock-based compensation plans	0		0
Stock-based compensation	$ 13,340		13,340
Acquisition of treasury stock (in shares)	(205,716)					(205,716)
Acquisition of treasury stock	$ (28,806)					$ (28,806)
Other comprehensive (loss)/income	(35,068)				(35,068)
Net income	$ 35,846			35,846
Ending balance (in shares) at Jun. 30, 2022	33,124,035	39,795,161				(6,671,126)
Ending balance at Jun. 30, 2022	$ 685,653	$ 40	$ 420,306	$ 828,161	$ (133,374)	$ (429,480)