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Leases - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2019
Lessee, Lease, Description [Line Items]      
Rent expense $ 2,081 $ 2,372  
Lease payments due next five years     $ 6,897
Lease payments due after year five 55   $ 0
Operating leases, 2019 payment 2,224    
Operating leases, 2020 payment 1,858    
Operating leases, 2021 payment 1,357    
Operating leases, 2022 payment 977    
Operating leases, 2023 payment $ 481    
Minimum      
Lessee, Lease, Description [Line Items]      
Term of contract     1 year
Maximum      
Lessee, Lease, Description [Line Items]      
Term of contract     5 years