Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock, Common [Member]	Total
Balances at Dec. 31, 2021	$ 1,671	$ 448,217	$ 5,621,103	$ (2,953,175)	$ 3,117,816
Net earnings	0	0	243,325	0	243,325
Cash dividend declared and paid	0	0	(41,940)	0	(41,940)
Purchase of treasury shares	0	0	0	(75,018)	(75,018)
Share-based compensation	0	19,141	0	0	19,141
Restricted share issuances, net of stock repurchased for payroll taxes and other	0	(5,842)	0	(3,940)	(9,782)
Balances at Mar. 31, 2022	1,671	461,516	5,822,488	(3,032,133)	3,253,542
Balances at Dec. 31, 2022	1,671	499,897	6,423,730	(3,258,530)	3,666,768
Net earnings	0	0	197,768	0	197,768
Cash dividend declared and paid	0	0	(43,584)	0	(43,584)
Purchase of treasury shares	0	0	0	(30,849)	(30,849)
Share-based compensation	0	19,248	0	0	19,248
Restricted share issuances, net of stock repurchased for payroll taxes and other	0	(7,826)	0	(4,154)	(11,980)
Balances at Mar. 31, 2023	$ 1,671	$ 511,319	$ 6,577,914	$ (3,293,533)	$ 3,797,371