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Commitments and Contingencies - Lease Maturities Prior to Adoption of ASC 842 (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
2020 $ 3,791
2021 3,819
2022 3,871
2023 2,889
2024 2,794
2025 and thereafter 12,338
Total lease payments $ 29,502