Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital	Retained Earnings (Deficit)	Accumulated Other Comprehensive Income (Loss)
Balance (in shares) at Dec. 31, 2020		40,232,000
Balance at Dec. 31, 2020	$ 639,470	$ 40	$ 519,579	$ 133,870	$ (14,019)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	98,655	0	0	98,655	0
Foreign currency translation	(1,268)	0	0	0	(1,268)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax	(3,046)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	9,137	$ 0	0	0	9,137
Repurchases of common stock, net of retirements (shares)		(215,000)
Repurchases of common stock, net of retirements	(71,516)	$ 0	0	(71,516)	0
Share-based compensation	3,837	$ 0	3,837	0	0
Issuance of shares under share-based compensation plans (shares)		69,000
Issuance of stock under share-based compensation plans	2,912	$ 0	2,912	0	0
Declaration of cash dividends	(23,299)	$ 0	0	(23,299)	0
Balance (in shares) at Mar. 31, 2021		40,086,000
Balance at Mar. 31, 2021	657,928	$ 40	526,328	137,710	(6,150)
Balance (in shares) at Dec. 31, 2020		40,232,000
Balance at Dec. 31, 2020	639,470	$ 40	519,579	133,870	(14,019)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	543,015			543,015
Foreign currency translation	(3,522)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax	(2,818)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	$ 8,453
Balance (in shares) at Sep. 30, 2021	40,079,584	40,080,000
Balance at Sep. 30, 2021	$ 985,212	$ 40	542,858	451,401	(9,087)
Balance (in shares) at Mar. 31, 2021		40,086,000
Balance at Mar. 31, 2021	657,928	$ 40	526,328	137,710	(6,150)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	259,695	0	0	259,695	0
Foreign currency translation	1,302	0	0	0	1,302
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax	719
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	(2,157)	$ 0	0	0	(2,157)
Repurchases of common stock, net of retirements (shares)		(45,000)
Repurchases of common stock, net of retirements	(18,619)	$ 0	0	(18,619)	0
Share-based compensation	3,712	$ 0	3,712	0	0
Issuance of shares under share-based compensation plans (shares)		90,000
Issuance of stock under share-based compensation plans	5,006	$ 0	5,006	0	0
Declaration of cash dividends	(32,119)	$ 0	0	(32,119)	0
Balance (in shares) at Jun. 30, 2021		40,131,000
Balance at Jun. 30, 2021	874,748	$ 40	535,046	346,667	(7,005)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	184,665	0	0	184,665	0
Foreign currency translation	(3,555)	0	0	0	(3,555)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax	(491)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	1,473	$ 0	0	0	1,473
Repurchases of common stock, net of retirements (shares)		(100,000)
Repurchases of common stock, net of retirements	(47,840)	$ 0	0	(47,840)	0
Share-based compensation	4,206	$ 0	4,206	0	0
Issuance of shares under share-based compensation plans (shares)		49,000
Issuance of stock under share-based compensation plans	3,606	$ 0	3,606	0	0
Declaration of cash dividends	$ (32,091)	$ 0	0	(32,091)	0
Balance (in shares) at Sep. 30, 2021	40,079,584	40,080,000
Balance at Sep. 30, 2021	$ 985,212	$ 40	542,858	451,401	(9,087)
Balance (in shares) at Dec. 31, 2021	40,192,901	40,193,000
Balance at Dec. 31, 2021	$ 1,071,393	$ 40	551,963	526,874	(7,484)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	179,261	0	0	179,261	0
Foreign currency translation	(214)	0	0	0	(214)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax	(3,866)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	11,598	$ 0	0	0	11,598
Repurchases of common stock, net of retirements (shares)		(138,000)
Repurchases of common stock, net of retirements	(62,420)	$ 0	0	(62,420)	0
Share-based compensation	3,657	$ 0	3,657	0	0
Issuance of shares under share-based compensation plans (shares)		55,000
Issuance of stock under share-based compensation plans	3,135	$ 0	3,135	0	0
Declaration of cash dividends	(32,132)	$ 0	0	(32,132)	0
Balance (in shares) at Mar. 31, 2022		40,110,000
Balance at Mar. 31, 2022	$ 1,174,278	$ 40	558,755	611,583	3,900
Balance (in shares) at Dec. 31, 2021	40,192,901	40,193,000
Balance at Dec. 31, 2021	$ 1,071,393	$ 40	551,963	526,874	(7,484)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	676,600			676,600
Foreign currency translation	(18,491)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax	(8,422)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	$ 25,267
Balance (in shares) at Sep. 30, 2022	39,054,302	39,054,000
Balance at Sep. 30, 2022	$ 1,190,878	$ 39	570,855	620,692	(708)
Balance (in shares) at Mar. 31, 2022		40,110,000
Balance at Mar. 31, 2022	1,174,278	$ 40	558,755	611,583	3,900
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	307,283	0	0	307,283	0
Foreign currency translation	(7,125)	0	0	0	(7,125)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax	(1,631)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	4,893	$ 0	0	0	4,893
Repurchases of common stock, net of retirements (shares)		(547,000)
Repurchases of common stock, net of retirements	(216,261)	$ 0	0	(216,261)	0
Share-based compensation	3,914	$ 0	3,914	0	0
Issuance of shares under share-based compensation plans (shares)		25,000
Issuance of stock under share-based compensation plans	1,972	$ 0	1,972	0	0
Declaration of cash dividends	(39,896)	$ 0	0	(39,896)	0
Balance (in shares) at Jun. 30, 2022		39,588,000
Balance at Jun. 30, 2022	1,229,058	$ 40	564,641	662,709	1,668
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	190,055	0	0	190,055	0
Foreign currency translation	(11,152)	0	0	0	(11,152)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax	(2,925)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	8,776	$ 0	0	0	8,776
Repurchases of common stock, net of retirements (shares)		(549,000)
Repurchases of common stock, net of retirements	(192,529)	$ (1)	0	(192,528)	0
Share-based compensation	4,120	$ 0	4,120	0	0
Issuance of shares under share-based compensation plans (shares)		15,000
Issuance of stock under share-based compensation plans	2,094	$ 0	2,094	0	0
Declaration of cash dividends	$ (39,544)	$ 0	0	(39,544)	0
Balance (in shares) at Sep. 30, 2022	39,054,302	39,054,000
Balance at Sep. 30, 2022	$ 1,190,878	$ 39	$ 570,855	$ 620,692	$ (708)