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Loans and Allowance for Loan Losses (Details 1) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Composition of gross loans by rate type    
Variable rate loans $ 432,540 $ 402,148
Fixed rate loans 1,510,985 1,275,184
Total gross loans, net of deferred fees $ 1,943,525 $ 1,677,332