Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Basic earnings per share:
Net income	$ 174,097	$ 154,547
Weighted average common shares outstanding - basic (in shares)	270,314	290,989
Basic earnings per share (in dollars per share)	$ 0.64	$ 0.53
Diluted earnings per share:
Net income	$ 174,097	$ 154,547
Dilutive securities	0	375
Diluted income available to common shareholders	$ 174,097	$ 154,922
Weighted average common shares outstanding - basic (in shares)	270,314	290,989
Effect of dilutive securities:
Unvested RSUs (in shares)	2,794	2,079
Dilutive securities (in shares)	0	1,644
Weighted average common shares outstanding - diluted (in shares)	273,108	294,712
Diluted earnings per share (in dollars per share)	$ 0.64	$ 0.53
Federal statutory income tax rate (in hundredths)	21.00%	21.00%
9% Convertible Junior Subordinated Debentures
Effect of dilutive securities:
Stated interest rate	9.00%