CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Amortized cost	$ 669,092	$ 729,198
Allowance for credit loss	0	0
Securities held to maturity, estimated fair value	785	2,402
Securities held to maturity, allowance for credit loss	$ 0	$ 0
Common stock par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	10,000,000	10,000,000
Common stock, shares issued (in shares)	5,310,076	5,310,076
Treasury stock, at cost (in shares)	572,663	615,448