General - Earning Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Accounting Policies [Abstract]
Net income	$ 351,198	$ 312,358	$ 999,649	$ 930,725
Weighted average common shares outstanding (in shares)	140,335	141,336	140,569	141,609
Dilutive effect of stock options and non-vested restricted stock awards (in shares)	599	773	716	819
Weighted average common shares outstanding - assuming dilution (in shares)	140,934	142,109	141,285	142,428
Basic earnings per share (usd per share)	$ 2.50	$ 2.21	$ 7.11	$ 6.57
Diluted earnings per share (usd per share)	$ 2.49	$ 2.20	$ 7.08	$ 6.53