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Consolidated Statements of Condition (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Statement of Financial Position [Abstract]    
Held to maturity securities, fair value $ 54,512 $ 53,459
Common stock, par value $ 1 $ 1
Common stock, shares authorized 15,000,000 15,000,000
Common stock, shares issued 4,943,186 4,943,186
Common stock, shares outstanding 4,943,186 4,943,186