REVENUES - Summary of Revenue by Geography (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
INAP US
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	$ 57,076
INAP INTL
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	17,125
United States | INAP INTL
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	57,076	$ 0
Canada | INAP US
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	0
Canada | INAP INTL
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	9,291
Other countries | INAP US
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	0
Other countries | INAP INTL
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	$ 7,834