Consolidated Statements of Financial Condition (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
ASSETS:
Held to maturity securities, fair value	$ 4,844	$ 5,306
SHAREHOLDERS' EQUITY:
Capital stock, par value (in dollars per share)	$ 1	$ 1
Capital stock, shares authorized (in shares)	30,000,000	30,000,000
Capital stock, shares issued (in shares)	20,097,152	20,097,152
Capital stock, shares outstanding (in shares)	18,851,014	19,019,749
Treasury stock, at cost (in shares)	1,246,138	1,077,403