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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Statement of Financial Position [Abstract]    
Securities Held-to-Maturity, Fair Value $ 186,644 $ 141,575
Common stock, par value $ 5 $ 5
Common stock, shares authorized 48,000,000 48,000,000
Common stock, shares issued 31,556,799 31,556,799
Common stock, shares outstanding 29,312,534 29,270,852
Treasury stock, shares 2,244,265 2,285,947