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Commitments and Contingencies - Purchase Commitments (Details)
$ in Thousands
Dec. 31, 2016
USD ($)
Bandwidth and Co-location Commitments  
Unrecorded Unconditional Purchase Obligation [Line Items]  
2017 $ 105,451
2018 13,799
2019 6,368
2020 386
2021 193
Thereafter 0
Total 126,197
Purchase Order Commitments  
Unrecorded Unconditional Purchase Obligation [Line Items]  
2017 137,642
2018 10,522
2019 1,827
2020 320
2021 320
Thereafter 0
Total $ 150,631