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Commitments and Contingencies - Schedule of Operating Leases Requiring Annual Minimum Lease Payments (Detail)
$ in Thousands
Dec. 31, 2017
USD ($)
Commitments And Contingencies Disclosure [Abstract]  
2018 $ 15,393
2019 14,489
2020 12,268
2021 12,197
2022 11,312
Thereafter 265,296
Total $ 330,955