Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
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)	$ 1,209,554	$ 702,291	$ 2,313,485	$ 1,132,798
Diluted earnings per share (in dollars)	$ 1,209,554	$ 702,291	$ 2,313,485	$ 1,132,798
Weighted Average Shares (Denominator)
Basic earnings per share (in shares)	186,442,000	209,647,000	189,300,000	210,331,000
Dilutive common share equivalents (in shares)	1,298,000	1,599,000	1,191,000	1,419,000
Diluted earnings per share (in shares)	187,740,000	211,246,000	190,491,000	211,750,000
Per Share Amount
Basic (in dollars per share)	$ 6.49	$ 3.35	$ 12.22	$ 5.39
Diluted (in dollars per share)	$ 6.44	$ 3.32	$ 12.14	$ 5.35