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Commitments and Contingencies - Future Purchase Commitments (Details)
$ in Thousands
Jun. 30, 2017
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
Remainder of 2016 $ 40,542
2017 16,706
2018 7,188
2019 3,624
2020 1,654
Thereafter 3
Unconditional purchase obligations $ 69,717