GOODWILL - Summary of re-allocations of Goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning of period	$ 50,209
Re-allocations	0
Goodwill, end of period	50,209
Data center and network services
Goodwill [Roll Forward]
Goodwill, beginning of period	0
Re-allocations	0
Goodwill, end of period	0
Cloud and hosting services
Goodwill [Roll Forward]
Goodwill, beginning of period	50,209
Re-allocations	(50,209)
Goodwill, end of period	0
INAP COLO
Goodwill [Roll Forward]
Goodwill, beginning of period	0
Re-allocations	6,003
Goodwill, end of period	6,003
INAP CLOUD
Goodwill [Roll Forward]
Goodwill, beginning of period	0
Re-allocations	44,206
Goodwill, end of period	$ 44,206