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Commitments and Contingencies - Schedule of Future Minimum Annual Commitments Under Non-Lease Contracts (Detail)
$ in Thousands
Sep. 30, 2019
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
Remainder of 2019 $ 0
2020 2,275
2021 2,275
2022 2,275
2023 2,275
Thereafter 31,850
Total $ 40,950