Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-in Capital	Additional Paid-in Capital Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Loss
Beginning Balance (in shares) at Dec. 31, 2021			34,333
Beginning Balance at Dec. 31, 2021	$ 1,583,321	$ (12,053)	$ 343	$ 13,662	$ (34,131)	$ 1,698,156	$ 22,078	$ (128,840)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	59,321					59,321
Other comprehensive income (loss)
Cumulative translation adjustment	(6,191)							(6,191)
Issuance of common stock in connection with:
Exercise of options (in shares)			26
Exercise of options	923			923
Restricted share grants (in shares)			134
Restricted share grants	(7,834)		$ 2	(7,836)
Stock units issued under incentive compensation plan	1,664			1,664
Purchase and retirement of common stock (in shares)			(22)
Purchase and retirement of common stock	(3,098)			(3,098)
Conversion of convertible senior notes due 2023	(2)			(2)
Share-based compensation	5,967			5,967
Reclassification of negative additional paid-in capital	0			22,851		(22,851)
Ending Balance (in shares) at Mar. 31, 2022			34,471
Ending Balance at Mar. 31, 2022	1,622,018		$ 345	0		1,756,704		(135,031)
Beginning Balance (in shares) at Dec. 31, 2021			34,333
Beginning Balance at Dec. 31, 2021	1,583,321	$ (12,053)	$ 343	13,662	$ (34,131)	1,698,156	$ 22,078	(128,840)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	110,749
Issuance of common stock in connection with:
Stock units issued under incentive compensation plan	1,664
Ending Balance (in shares) at Jun. 30, 2022			34,540
Ending Balance at Jun. 30, 2022	1,630,619		$ 345	499		1,805,485		(175,710)
Beginning Balance (in shares) at Mar. 31, 2022			34,471
Beginning Balance at Mar. 31, 2022	1,622,018		$ 345	0		1,756,704		(135,031)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	51,428					51,428
Other comprehensive income (loss)
Cumulative translation adjustment	(40,679)							(40,679)
Issuance of common stock in connection with:
Exercise of options (in shares)			22
Exercise of options	687			687
Restricted share grants (in shares)			47
Restricted share grants	(8,907)			(8,907)
Conversion of convertible senior notes due 2023	(11)			(11)
Share-based compensation	6,083			6,083
Reclassification of negative additional paid-in capital	0			2,647		(2,647)
Ending Balance (in shares) at Jun. 30, 2022			34,540
Ending Balance at Jun. 30, 2022	$ 1,630,619		$ 345	499		1,805,485		(175,710)
Beginning Balance (in shares) at Dec. 31, 2022	34,026		34,026
Beginning Balance at Dec. 31, 2022	$ 1,681,721		$ 340	0		1,858,103		(176,722)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	47,547					47,547
Other comprehensive income (loss)
Cumulative translation adjustment	9,850							9,850
Issuance of common stock in connection with:
Exercise of options (in shares)			14
Exercise of options	449			449
Restricted share grants (in shares)			55
Restricted share grants	(9,513)		$ 1	(9,514)
Stock units issued under incentive compensation plan	2,274			2,274
Purchase and retirement of common stock (in shares)			(112)
Purchase and retirement of common stock	(17,799)		$ (1)	(17,798)
Conversion of convertible senior notes due 2023	(6)			(6)
Share-based compensation	6,365			6,365
Reclassification of negative additional paid-in capital	0			18,230		(18,230)
Ending Balance (in shares) at Mar. 31, 2023			33,983
Ending Balance at Mar. 31, 2023	$ 1,720,888		$ 340	0		1,887,420		(166,872)
Beginning Balance (in shares) at Dec. 31, 2022	34,026		34,026
Beginning Balance at Dec. 31, 2022	$ 1,681,721		$ 340	0		1,858,103		(176,722)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	109,942
Issuance of common stock in connection with:
Stock units issued under incentive compensation plan	$ 2,274
Ending Balance (in shares) at Jun. 30, 2023	34,034		34,034
Ending Balance at Jun. 30, 2023	$ 1,795,152		$ 340	5,473		1,949,815		(160,476)
Beginning Balance (in shares) at Mar. 31, 2023			33,983
Beginning Balance at Mar. 31, 2023	1,720,888		$ 340	0		1,887,420		(166,872)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	62,395					62,395
Other comprehensive income (loss)
Cumulative translation adjustment	6,396							6,396
Issuance of common stock in connection with:
Exercise of options (in shares)			21
Exercise of options	718			718
Restricted share grants (in shares)			30
Restricted share grants	(2,408)			(2,408)
Conversion of convertible senior notes due 2023	(375)			(375)
Share-based compensation	$ 7,538			7,538
Ending Balance (in shares) at Jun. 30, 2023	34,034		34,034
Ending Balance at Jun. 30, 2023	$ 1,795,152		$ 340	$ 5,473		$ 1,949,815		$ (160,476)