Consolidated Statements of Financial Condition (Unaudited) (Parenthetical) $ in Thousands	Jun. 30, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares
ASSETS:
Held to maturity securities, fair value | $	$ 8,733	$ 10,695
SHAREHOLDERS' EQUITY:
Capital stock, par value (in dollars per share) | $ / shares	$ 1	$ 1
Capital stock, shares authorized (in shares)	30,000,000	30,000,000
Capital stock, shares issued (in shares)	20,045,684	20,045,684
Capital stock, shares outstanding (in shares)	19,126,875	19,219,989
Treasury stock, at cost (in shares)	918,809	825,695