Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Loans held for sale at fair value	$ 48,583	$ 40,044
Allowance for loans losses	$ 31,344	$ 27,500
Stockholders' Equity:
Common stock, without par value (in dollars per share)
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	43,180,079	43,120,625
Common stock, shares outstanding	43,180,079	43,120,625
Preferred stock, shares authorized	5,000,000	5,000,000
8% Preferred Stock
Stockholders' Equity:
Preferred stock, dividend rate (as a percent)	8.00%	8.00%
Preferred stock liquidation preference (in dollars per share)	$ 1,000	$ 1,000
Preferred stock, shares authorized	50,000	50,000
Preferred stock, shares issued	0	41,625
Preferred stock, shares outstanding	0	41,625
7% Preferred Stock
Stockholders' Equity:
Preferred stock, dividend rate (as a percent)	7.00%	7.00%
Preferred stock liquidation preference (in dollars per share)	$ 25	$ 25
Preferred stock, shares authorized	3,500,000	3,500,000
Preferred stock, shares issued	2,081,800	2,081,800
Preferred stock, shares outstanding	2,081,800	2,081,800
6% Series B 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
Preferred stock, shares authorized	125,000	125,000
Preferred stock, shares issued	125,000	125,000
Preferred stock, shares outstanding	125,000	125,000
Depositary shares	5,000,000	5,000,000
6% Series C Preferred Stock
Stockholders' Equity:
Preferred stock, dividend rate (as a percent)	6.00%
Preferred stock liquidation preference (in dollars per share)	$ 1,000
Preferred stock, shares authorized	250,000
Preferred stock, shares issued	196,181
Preferred stock, shares outstanding	196,181
Depositary shares	7,847,233