Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Loans held for sale at fair value	$ 2,130	$ 1,507
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	100,000,000	100,000,000
Preferred stock, shares issued	9,000,000	9,000,000
Preferred stock, shares outstanding	9,000,000	9,000,000
Common stock, par value (usd per share)	$ 1.00	$ 1.00
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	32,617,410	32,252,488
Common stock, shares outstanding	31,336,791	31,003,028
Treasury stock, shares	1,280,619	1,249,460