Consolidated Statements of Condition (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
ASSETS:
Held-to-maturity securities, at amortized cost fair value	$ 154,972	$ 168,034
Voting Common Stock [Member]
Shareholders' equity:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	25,000,000	25,000,000
Common stock, shares issued (in shares)	4,719,788	4,719,288
Common stock, shares outstanding (in shares)	4,719,788	4,719,288
Non-Voting Common Stock [Member]
Shareholders' equity:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,505,283	1,505,283
Common stock, shares issued (in shares)	1,380,283	1,380,283
Common stock, shares outstanding (in shares)	1,380,283	1,380,283