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Leases Leases - Future Minimum Payments under Topic 840 (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Leases [Abstract]  
2019 $ 3,618
2020 3,113
2021 3,059
2022 3,056
2023 3,049
Thereafter 11,437
Total future minimum lease payments $ 27,332