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Leases (Maturities of the gross operating lease liability) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Leases [Abstract]      
Operating leases, weighted average remaining lease term (years) 12 years 1 month 6 days   12 years
Operating leases, weighted average discount rate 4.66%   4.63%
Operating      
2019 $ 921    
2021 1,191    
2022 600    
2023 630    
2024 573    
Thereafter 5,053    
Gross lease liability 8,968   $ 9,278
Operating lease cost 314 $ 330  
Sublease Income $ 27 $ 27