Description of the Business and Summary of Significant Accounting Policies (Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Earnings Per Share
Antidilutive common share equivalents excluded from computation of earnings per share amount (in shares)	0	0	0
Net Income (Numerator)
Basic earnings per share (in dollars)	$ 2,450,882	$ 3,862,674	$ 3,214,066
Diluted earnings per share (in dollars)	$ 2,450,882	$ 3,862,674	$ 3,214,066
Weighted Average Shares (Denominator)
Basic earnings per share (in shares)	166,552,000	183,393,000	205,115,000
Dilutive common share equivalents (in shares)	879,000	1,229,000	1,500,000
Diluted earnings per share (in shares)	167,431,000	184,622,000	206,615,000
Per Share Amount
Basic (in dollars per share)	$ 14.72	$ 21.06	$ 15.67
Diluted (in dollars per share)	$ 14.64	$ 20.92	$ 15.56