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Premises and Equipment (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2019
Dec. 31, 2018
Lessee Disclosure [Abstract]      
Lease liabilities $ 17,100 $ 17,100  
Right-of-use assets $ 15,789 $ 15,789
Lease term for operating leases 7 years 4 months 24 days 7 years 4 months 24 days  
Weighted average discount rate 3.00% 3.00%  
Lease costs $ 700 $ 2,300  
Rent expense $ 6 $ 16