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CONSOLIDATED STATEMENTS OF CONDITION (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Statement of Financial Position [Abstract]    
Available-for-sale securities, at amortized cost $ 1,442,724 $ 1,390,255
Fair Value $ 142,832 $ 146,686
Common Stock, par value (in dollars per share) $ 0.1 $ 0.10
Common Stock, authorized (in shares) 25,000,000 25,000,000
Common Stock, issued (in shares) 15,171,816 15,015,594
Treasury stock, shares (in shares) 117,997 116,126