Accumulated Other Comprehensive Income or Loss and Earnings Per Share - Schedule of Computation of Basic and Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Equity [Abstract]
Net income	$ 152,388	$ 154,750	$ 339,682	$ 334,948
Less: Preferred stock dividends	6,991	6,991	13,982	13,982
Net income applicable to common shares	$ 145,397	$ 147,759	$ 325,700	$ 320,966
Weighted average common shares outstanding (in shares)	61,839	61,192	61,660	61,072
Effect of dilutive potential common shares
Common stock equivalents (in shares)	926	902	901	933
Average common shares and dilutive common shares (in shares)	62,765	62,094	62,561	62,005
Net income per common share:
Basic (usd per share)	$ 2.35	$ 2.41	$ 5.28	$ 5.26
Diluted (usd per share)	$ 2.32	$ 2.38	$ 5.21	$ 5.18