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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Statement of Financial Position [Abstract]    
Available for sale securities amortized cost $ 881,570 $ 895,273
Allowance for credit losses on securities $ 0  
Common stock, par value (in dollars per share) $ 0.0625 $ 0.0625
Common stock, shares authorized (in shares) 60,000,000 60,000,000
Common stock, shares issued (in shares) 17,363,457 17,363,455
Common stock, shares outstanding (in shares) 17,265,337 17,363,455
Treasury stock (in shares) 98,120