Consolidated Statements of Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive 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)		344,173
Stock issued against stock-based compensation plans	709		709
Stock-based compensation	$ 28,796		28,796
Acquisition of treasury stock (in shares)	(844,656)					(870,106)
Acquisition of treasury stock	$ (85,620)					$ (85,620)
Issuance of treasury stock	36,742		19,436			$ 17,306
Issuance of treasury stock (in shares)						310,394
Settlement of convertible notes	(84,000)		(84,000)
Other comprehensive (loss)/income	(17,273)				(17,273)
Net income	86,459			86,459
Ending balance (in shares) at Sep. 30, 2021		39,312,225				(5,968,330)
Ending balance at Sep. 30, 2021	684,985	$ 39	385,917	727,838	(92,257)	$ (336,552)
Beginning balance (in shares) at Jun. 30, 2021		39,283,853				(6,034,144)
Beginning balance at Jun. 30, 2021	728,014	$ 39	439,051	701,331	(86,745)	$ (325,662)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued against stock-based compensation plans (in shares)		28,372
Stock issued against stock-based compensation plans	536		536
Stock-based compensation	$ 10,894		10,894
Acquisition of treasury stock (in shares)	(244,580)					(244,580)
Acquisition of treasury stock	$ (28,196)					$ (28,196)
Issuance of treasury stock	36,742		19,436			$ 17,306
Issuance of treasury stock (in shares)						310,394
Settlement of convertible notes	(84,000)		(84,000)
Other comprehensive (loss)/income	(5,512)				(5,512)
Net income	26,507			26,507
Ending balance (in shares) at Sep. 30, 2021		39,312,225				(5,968,330)
Ending balance at Sep. 30, 2021	$ 684,985	$ 39	385,917	727,838	(92,257)	$ (336,552)
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)		290,616
Stock issued against stock-based compensation plans	0
Stock-based compensation	$ 36,750		36,750
Acquisition of treasury stock (in shares)	(503,858)					(531,077)
Acquisition of treasury stock	$ (71,712)					$ (71,712)
Other comprehensive (loss)/income	(64,729)				(64,729)
Net income	$ 111,119			111,119
Ending balance (in shares) at Sep. 30, 2022	33,051,021	39,798,956				(6,747,935)
Ending balance at Sep. 30, 2022	$ 704,584	$ 40	432,492	867,256	(154,203)	$ (441,001)
Beginning balance (in shares) at Jun. 30, 2022		39,795,161				(6,671,126)
Beginning balance at Jun. 30, 2022	685,653	$ 40	420,306	828,161	(133,374)	$ (429,480)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued against stock-based compensation plans (in shares)		3,795
Stock issued against stock-based compensation plans	0
Stock-based compensation	$ 12,186		12,186
Acquisition of treasury stock (in shares)	(76,809)					(76,809)
Acquisition of treasury stock	$ (11,521)					$ (11,521)
Other comprehensive (loss)/income	(20,829)				(20,829)
Net income	$ 39,095			39,095
Ending balance (in shares) at Sep. 30, 2022	33,051,021	39,798,956				(6,747,935)
Ending balance at Sep. 30, 2022	$ 704,584	$ 40	$ 432,492	$ 867,256	$ (154,203)	$ (441,001)