Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2024	Dec. 31, 2023
Securities available for sale	$ 635,946	$ 635,946	$ 722,497
Securities held to maturity, fair value	1,664,674	1,664,674	1,203,535
Loans held for sale at fair value	78,170	78,170	86,663
Net of allowance for credit losses on loans	$ 84,386	$ 84,386	$ 71,752
Stockholders' Equity
Common stock, shares authorized	75,000,000	75,000,000	75,000,000
Common stock, shares issued	45,767,166	45,767,166	43,242,928
Common stock, shares outstanding	45,767,166	45,767,166	43,242,928
Preferred stock, shares authorized	5,000,000	5,000,000	5,000,000
7% Series A Preferred Stock
Stockholders' Equity
Preferred stock, dividend rate (as a percent)			7.00%
Preferred stock liquidation preference (in dollars per share)			$ 25
Preferred stock, shares authorized	0	0	3,500,000
Preferred stock, shares issued	0	0	2,081,800
Preferred stock, shares outstanding	0	0	2,081,800
6% Series B Preferred Stock
Stockholders' Equity
Preferred stock, dividend rate (as a percent)	9.42%	6.00%	6.00%
Preferred stock liquidation preference (in dollars per share)	$ 1,000	$ 1,000	$ 1,000
Preferred stock, shares authorized	125,000	125,000	125,000
Preferred stock, shares issued	125,000	125,000	125,000
Preferred stock, shares outstanding	125,000	125,000	125,000
Depositary shares	5,000,000	5,000,000	5,000,000
6% Series C Preferred Stock
Stockholders' Equity
Preferred stock, dividend rate (as a percent)		6.00%	6.00%
Preferred stock liquidation preference (in dollars per share)	$ 1,000	$ 1,000	$ 1,000
Preferred stock, shares authorized	200,000	200,000	200,000
Preferred stock, shares issued	196,181	196,181	196,181
Preferred stock, shares outstanding	196,181	196,181	196,181
Depositary shares	7,847,233	7,847,233	7,847,233
8.25% Series D Preferred Stock
Stockholders' Equity
Preferred stock, dividend rate (as a percent)		8.25%	8.25%
Preferred stock liquidation preference (in dollars per share)	$ 1,000	$ 1,000	$ 1,000
Preferred stock, shares authorized	300,000	300,000	300,000
Preferred stock, shares issued	142,500	142,500	142,500
Preferred stock, shares outstanding	142,500	142,500	142,500
Depositary shares	5,700,000	5,700,000	5,700,000
7.625% Series E Preferred Stock
Stockholders' Equity
Preferred stock, dividend rate (as a percent)		7.625%
Preferred stock liquidation preference (in dollars per share)	$ 1,000	$ 1,000
Preferred stock, shares authorized	230,000	230,000
Preferred stock, shares issued	230,000	230,000
Preferred stock, shares outstanding	230,000	230,000
Depositary shares	9,200,000	9,200,000