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Consolidated Statements of Financial Condition (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Consolidated Statements of Financial Condition [Abstract]    
Available-for-sale Securities, Amortized Cost $ 98,765 $ 113,555
Held-to-maturity Securities, Fair Value $ 61,135 $ 62,420
Common stock par value per share $ 1.00 $ 1.00
Common stock, shares authorized 20,000,000 20,000,000
Common stock, shares, issued 4,381,872 4,362,939
Common stock, shares, outstanding 4,321,745 4,286,117
Treasury stock, shares 60,127 76,822