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Leases (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Leases [Abstract]    
Right-of-use asset $ 3,479 $ 0
Lease liability 2,808 0
Leases [Abstract]    
Operating lease expense 237  
Cash Flows Related to Operating Leases    
Operating cash flows from leases $ (257)  
Operating Lease Weighted Average Remaining Lease Term and Discount Rate [Abstract]    
Weighted average remaining lease term 5 years 4 months 24 days  
Weighted average discount rate 3.70%  
Maturity of Operating Lease Liabilities [Abstract]    
2019 $ 773  
2020 1,032  
2021 701  
2022 432  
2023 268  
Thereafter 888  
Total undiscounted lease payments 4,094  
Less imputed interest 377  
Total lease liabilities $ 3,717  
Future Minimum Rental Commitments Under Non-Cancelable Operating Leases [Abstract]    
Total undiscounted rental commitments   4,300
2019   1,000
2020   1,000
2021   700
2022   400
2023   300
Thereafter   900
Minimum [Member]    
Leases [Abstract]    
Remaining lease terms 1 year  
Maximum [Member]    
Leases [Abstract]    
Remaining lease terms 8 years  
Extension period for leases 5 years  
Termination period for leases 1 year  
ASC 842 [Member]    
Leases [Abstract]    
Right-of-use asset   3,700
Lease liability   $ 3,900