General - Earning Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Accounting Policies [Abstract]
Net income	$ 344,494	$ 372,529	$ 648,451	$ 618,367
Weighted average common shares outstanding (in shares)	140,574	141,581	140,688	141,747
Dilutive effect of stock options and non-vested restricted stock awards (in shares)	673	723	808	835
Weighted average common shares outstanding - assuming dilution (in shares)	141,247	142,304	141,496	142,582
Basic earnings per share (usd per share)	$ 2.45	$ 2.63	$ 4.61	$ 4.36
Diluted earnings per share (usd per share)	$ 2.44	$ 2.62	$ 4.58	$ 4.34