Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Earnings Per Share [Abstract]
Net income	$ 622,626	$ 509,682	$ 466,151
Less: Preferred stock dividends	27,964	27,964	27,964
Net income applicable to common shares	$ 594,662	$ 481,718	$ 438,187
Weighted average common shares outstanding (in shares)	61,149	59,205	56,994
Effect of dilutive potential common shares:
Common stock equivalents (in shares)	938	886	792
Average common shares and dilutive common shares (in shares)	62,087	60,091	57,786
Net income per common share:
Basic (usd per share)	$ 9.72	$ 8.14	$ 7.69
Diluted (usd per share)	$ 9.58	$ 8.02	$ 7.58