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Commitments and Contingencies - Schedule of Future Minimum Obligations for Purchases of Inventory, Services, and Other (Detail)
$ in Thousands
Dec. 31, 2016
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
2017 $ 409,298
2018 21,900
2019 12,206
2020 1,104
2021 0
Total future minimum obligations for purchases of inventory, services, and other $ 444,508