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Commitments and Contingencies - Future Purchase Commitments (Details)
$ in Thousands
Sep. 30, 2016
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
Remainder of 2016 $ 35,867
2017 17,817
2018 5,223
2019 2,691
2020 459
Thereafter 28
Unconditional purchase obligations $ 62,085