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Leases - Maturity (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Jan. 01, 2019
Leases [Abstract]    
2020 $ 2,297  
2021 2,268  
2022 1,862  
2023 1,813  
2024 1,795  
Thereafter 6,970  
Total lease payments 17,005  
Total operating lease liabilities $ 11,359 $ 11,700