Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock, Common [Member]	Total
Balance 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
Common Stock, Dividends, Per Share, Cash 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)
Balance at Mar. 31, 2023	1,671	511,319	6,577,914	(3,293,533)	3,797,371
Balance at Dec. 31, 2023	1,671	549,132	6,978,119	(3,425,164)	4,103,758
Net earnings	0	0	127,493	0	127,493
Common Stock, Dividends, Per Share, Cash Paid	0	0	(44,418)	0	(44,418)
Purchase of treasury shares	0	0	0	(25,140)	(25,140)
Share-based compensation	0	18,409	0	0	18,409
Restricted share issuances, net of stock repurchased for payroll taxes and other	0	(9,096)	0	(4,575)	(13,671)
Balance at Mar. 31, 2024	$ 1,671	$ 558,445	$ 7,061,194	$ (3,454,879)	$ 4,166,431