Consolidated Balance Sheet - Unaudited (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Allowance for credit losses	$ 728
Loans held for sale at fair value	$ 2,496	$ 15,747
Preferred stock, par value (usd per share)	$ 1.00	$ 1.00
Preferred stock, liquidation preference (usd per share)	$ 25.00	$ 25.00
Preferred stock, shares authorized (shares)	100,000,000	100,000,000
Preferred stock, shares issued (shares)	5,700,000	5,700,000
Preferred stock, shares outstanding (shares)	5,700,000	5,700,000
Common stock, par value (usd per share)	$ 1.00	$ 1.00
Common stock, shares authorized (shares)	200,000,000	200,000,000
Common stock, shares issued (shares)	34,881,580	34,721,675
Common stock, shares outstanding (shares)	32,957,847	32,913,267
Treasury stock, shares (shares)	1,923,732	1,808,408