Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
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)	$ 427,998	$ 812,107	$ 1,012,039	$ 1,449,417
Diluted earnings per share (in dollars)	$ 427,998	$ 812,107	$ 1,012,039	$ 1,449,417
Weighted Average Shares (Denominator)
Basic earnings per share (in shares)	156,856,000	168,009,000	157,761,000	169,803,000
Dilutive common share equivalents (in shares)	723,000	856,000	706,000	869,000
Diluted earnings per share (in shares)	157,579,000	168,865,000	158,467,000	170,672,000
Per Share Amount
Basic (in dollars per share)	$ 2.73	$ 4.83	$ 6.42	$ 8.54
Diluted (in dollars per share)	$ 2.72	$ 4.81	$ 6.39	$ 8.49