GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Re-allocations of Goodwill (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Operating segments:
Goodwill, beginning of period	$ 50,209
Re-allocations	0
SingleHop Acquisition	67,868
Goodwill, end of period	118,077
INAP COLO
Operating segments:
Goodwill, beginning of period	6,003
Re-allocations	(6,003)
SingleHop Acquisition	0
Goodwill, end of period	0
INAP CLOUD
Operating segments:
Goodwill, beginning of period	44,206
Re-allocations	(44,206)
SingleHop Acquisition	0
Goodwill, end of period	0
INAP US
Operating segments:
Goodwill, beginning of period	0
Re-allocations	28,304
SingleHop Acquisition	67,868
Goodwill, end of period	96,172
INAP INTL
Operating segments:
Goodwill, beginning of period	0
Re-allocations	21,905
SingleHop Acquisition	0
Goodwill, end of period	$ 21,905