Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share
Antidilutive common share equivalents excluded from computation of earnings per share amount (in shares)	0	0
Net Income (Numerator)
Basic earnings per share (in dollars)	$ 584,041	$ 637,310
Diluted earnings per share (in dollars)	$ 584,041	$ 637,310
Weighted Average Shares (Denominator)
Basic earnings per share (in shares)	158,666,000	171,597,000
Dilutive common share equivalents (in shares)	688,000	882,000
Diluted earnings per share (in shares)	159,354,000	172,479,000
Per Share Amount
Basic (in dollars per share)	$ 3.68	$ 3.71
Diluted (in dollars per share)	$ 3.67	$ 3.70