CONDENSED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income, Net [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Noncontrolling Interests [Member]
Beginning balance at Dec. 31, 2022	$ 3,045,168	$ 6,547	$ 859,345	$ 16,853	$ 2,468,730	$ (308,598)	$ 2,291
Beginning balance (in shares) at Dec. 31, 2022		65,472,000				(5,565,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises	3,431		357			$ 3,074
Stock option exercises (in shares)						61,000
Issuance of stock for equity awards, net of forfeitures			(10,084)			$ 10,084
Issuance of stock for equity awards, net of forfeitures (in shares)						182,000
Tax withholdings on equity award vesting	(3,598)					$ (3,598)
Tax withholdings on equity award vesting (in shares)						(55,000)
Amortization of share-based compensation	12,310		12,310
Treasury stock purchases	(60,910)					$ (60,910)
Treasury stock purchases (in shares)						(812,000)
Excise taxes on treasury stock purchases	(472)					$ (472)
Total comprehensive income, net of taxes	163,168			2,225	161,029		(86)
Return of investment to noncontrolling interests	(1,015)						(1,015)
Ending balance at Sep. 30, 2023	3,158,082	$ 6,547	861,928	19,078	2,629,759	$ (360,420)	1,190
Ending balance (in shares) at Sep. 30, 2023		65,472,000				(6,189,000)
Beginning balance at Jun. 30, 2023	3,112,809	$ 6,547	857,965	18,996	2,566,795	$ (339,659)	2,165
Beginning balance (in shares) at Jun. 30, 2023		65,472,000				(5,946,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises	3,313		574			$ 2,739
Stock option exercises (in shares)						48,000
Issuance of stock for equity awards, net of forfeitures			(9)			$ 9
Issuance of stock for equity awards, net of forfeitures (in shares)						0
Tax withholdings on equity award vesting	(2)					$ (2)
Amortization of share-based compensation	3,398		3,398
Treasury stock purchases	(23,310)					$ (23,310)
Treasury stock purchases (in shares)						(291,000)
Excise taxes on treasury stock purchases	(197)					$ (197)
Total comprehensive income, net of taxes	63,086			82	62,964		40
Return of investment to noncontrolling interests	(1,015)						(1,015)
Ending balance at Sep. 30, 2023	3,158,082	$ 6,547	861,928	19,078	2,629,759	$ (360,420)	1,190
Ending balance (in shares) at Sep. 30, 2023		65,472,000				(6,189,000)
Beginning balance at Dec. 31, 2023	3,186,677	$ 6,547	863,963	35,006	2,691,665	$ (411,750)	1,246
Beginning balance (in shares) at Dec. 31, 2023		65,472,000				(6,843,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises	8,375		1,750			$ 6,625
Stock option exercises (in shares)						113,000
Issuance of stock for equity awards, net of forfeitures			(12,577)			$ 12,577
Issuance of stock for equity awards, net of forfeitures (in shares)						208,000
Tax withholdings on equity award vesting	(5,356)					$ (5,356)
Tax withholdings on equity award vesting (in shares)						(68,000)
Amortization of share-based compensation	12,837		12,837
Treasury stock purchases	(141,272)					$ (141,272)
Treasury stock purchases (in shares)						(1,354,000)
Excise taxes on treasury stock purchases	(1,191)					$ (1,191)
Total comprehensive income, net of taxes	243,540			(388)	243,890		38
Ending balance at Sep. 30, 2024	3,303,610	$ 6,547	865,973	34,618	2,935,555	$ (540,367)	1,284
Ending balance (in shares) at Sep. 30, 2024		65,472,000				(7,944,000)
Beginning balance at Jun. 30, 2024	3,262,678	$ 6,547	862,258	35,124	2,845,587	$ (488,059)	1,221
Beginning balance (in shares) at Jun. 30, 2024		65,472,000				(7,520,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises	4,280		316			$ 3,964
Stock option exercises (in shares)						59,000
Issuance of stock for equity awards, net of forfeitures			(39)			$ 39
Issuance of stock for equity awards, net of forfeitures (in shares)						1,000
Tax withholdings on equity award vesting	(17)					$ (17)
Tax withholdings on equity award vesting (in shares)						(1,000)
Amortization of share-based compensation	3,438		3,438
Treasury stock purchases	(55,806)					$ (55,806)
Treasury stock purchases (in shares)						(483,000)
Excise taxes on treasury stock purchases	(488)					$ (488)
Total comprehensive income, net of taxes	89,525			(506)	89,968	0	63
Ending balance at Sep. 30, 2024	$ 3,303,610	$ 6,547	$ 865,973	$ 34,618	$ 2,935,555	$ (540,367)	$ 1,284
Ending balance (in shares) at Sep. 30, 2024		65,472,000				(7,944,000)