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Commitments and Contingencies - Future Minimum Non-Cancelable Lease Payments Under Operating Leases (Detail)
$ in Thousands
Dec. 31, 2018
USD ($)
Commitments And Contingencies Disclosure [Abstract]  
2019 $ 3,535
2020 3,027
2021 3,076
2022 2,703
2023 2,611
Thereafter 18,690
Total $ 33,642