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Commitments and Contingencies (Lease Maturities Prior to Adoption of ASC 842) (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Leases [Abstract]  
2019 $ 3,807
2020 3,791
2021 3,819
2022 3,871
2023 2,889
2024 and thereafter 15,132
Total lease payments $ 33,309