CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Statement Of Financial Position [Abstract]
Securities held to maturity, fair value	$ 8,632	$ 9,940
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, par value
Preferred stock, shares outstanding	0	0
Common stock, shares authorized	100,000,000	100,000,000
Common stock, par value
Common stock, shares issued	20,030,866	20,000,022
Common stock, shares outstanding	20,030,866	20,000,022