Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share
Antidilutive common share equivalents excluded from computation of earnings per share amount (in shares)	0	0	0	0
Net Income (Numerator)
Basic earnings per share (in dollars)	$ 577,195	$ 914,325	$ 2,026,612	$ 3,227,810
Diluted earnings per share (in dollars)	$ 577,195	$ 914,325	$ 2,026,612	$ 3,227,810
Weighted Average Shares (Denominator)
Basic earnings per share (in shares)	165,170,000	180,264,000	168,259,000	186,288,000
Dilutive common share equivalents (in shares)	935,000	1,349,000	891,000	1,243,000
Diluted earnings per share (in shares)	166,105,000	181,613,000	169,150,000	187,531,000
Per Share Amount
Basic (in dollars per share)	$ 3.49	$ 5.07	$ 12.04	$ 17.33
Diluted (in dollars per share)	$ 3.47	$ 5.03	$ 11.98	$ 17.21