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Consolidated Statements of Financial Condition (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Consolidated Statements of Financial Condition [Abstract]    
Available-for-sale Securities, Amortized Cost $ 65,716 $ 98,765
Held-to-maturity Securities, Fair Value $ 57,884 $ 61,135
Common stock par value per share $ 1.00 $ 1.00
Common stock, shares authorized 20,000,000 20,000,000
Common stock, shares, issued 4,382,223 4,381,872
Common stock, shares, outstanding 4,334,782 4,321,745
Treasury stock, shares 47,441 60,127