CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Held to maturity, fair value	$ 0	$ 86,817
Common stock, par or stated value per share (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	100,600,000	100,600,000
Common stock, shares, issued (in shares)	9,741,253	9,741,253