Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 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)	$ 812,107	$ 1,209,554	$ 1,449,417	$ 2,313,485
Diluted earnings per share (in dollars)	$ 812,107	$ 1,209,554	$ 1,449,417	$ 2,313,485
Weighted Average Shares (Denominator)
Basic earnings per share (in shares)	168,009,000	186,442,000	169,803,000	189,300,000
Dilutive common share equivalents (in shares)	856,000	1,298,000	869,000	1,191,000
Diluted earnings per share (in shares)	168,865,000	187,740,000	170,672,000	190,491,000
Per Share Amount
Basic (in dollars per share)	$ 4.83	$ 6.49	$ 8.54	$ 12.22
Diluted (in dollars per share)	$ 4.81	$ 6.44	$ 8.49	$ 12.14