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Commitments and Contingencies - Schedule of Future Minimum Purchase Commitments (Detail)
$ in Thousands
Sep. 30, 2015
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
2015 $ 4,417
2016 20,464
2017 13,110
2018 1,382
2019 330
2020 and thereafter 300
Total future minimum other purchase commitments $ 40,003