Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Basic earnings per share [Abstract]
Net income	$ 865,349	$ 634,983	$ 446,093
Weighted average common shares outstanding - basic (in shares)	305,847	334,330	339,953
Basic earnings per share (in dollars per share)	$ 2.83	$ 1.90	$ 1.31
Diluted earnings per share [Abstract]
Net income	$ 865,349	$ 634,983	$ 446,093
Diluted income available to common shareholders	$ 868,577	$ 649,326	$ 463,097
Weighted-average shares - basic (in shares)	305,847	334,330	339,953
Effect of dilutive securities [Abstract]
Weighted-average shares - diluted (in shares)	311,229	351,308	359,293
Diluted income per share (in dollars per share)	$ 2.79	$ 1.85	$ 1.29
Federal statutory income tax rate (in hundredths)	21.00%	21.00%	21.00%
9% Convertible Junior Subordinated Debentures due 2063
Diluted earnings per share [Abstract]
Dilutive securities	$ 3,228	$ 14,343	$ 17,004
Effect of dilutive securities [Abstract]
Dilutive securities (in shares)	3,465	15,196	17,751
Stated interest rate (in hundredths)	9.00%	9.00%	9.00%
Unvested Restricted Stock Units
Effect of dilutive securities [Abstract]
Dilutive securities - Share based compensation (in shares)	1,917	1,782	1,589