OPERATING SEGMENTS - Schedule of Change in Organizational Structure (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues:
Total revenues	$ 82,972	$ 68,907	$ 239,135	$ 210,682
Cost of sales and services, customer support and sales and marketing:
Costs of sales and services, exclusive of depreciation and amortization	28,866	24,945	81,880	80,419
INAP COLO
Revenues:
Total revenues		0		0
Cost of sales and services, customer support and sales and marketing:
Costs of sales and services, exclusive of depreciation and amortization		0		0
INAP CLOUD
Revenues:
Total revenues		0		0
Cost of sales and services, customer support and sales and marketing:
Costs of sales and services, exclusive of depreciation and amortization		0		0
INAP US
Revenues:
Total revenues	65,678	52,970	186,821	162,544
Cost of sales and services, customer support and sales and marketing:
Costs of sales and services, exclusive of depreciation and amortization		18,906		63,589
INAP INTL
Revenues:
Total revenues	$ 17,294	15,937	$ 52,314	48,138
Cost of sales and services, customer support and sales and marketing:
Costs of sales and services, exclusive of depreciation and amortization		6,039		16,830
As Previously Reported | INAP COLO
Revenues:
Total revenues		51,344		156,727
Cost of sales and services, customer support and sales and marketing:
Costs of sales and services, exclusive of depreciation and amortization		20,785		67,661
As Previously Reported | INAP CLOUD
Revenues:
Total revenues		17,563		53,955
Cost of sales and services, customer support and sales and marketing:
Costs of sales and services, exclusive of depreciation and amortization		4,160		12,758
As Previously Reported | INAP US
Revenues:
Total revenues		0		0
Cost of sales and services, customer support and sales and marketing:
Costs of sales and services, exclusive of depreciation and amortization		0		0
As Previously Reported | INAP INTL
Revenues:
Total revenues		0		0
Cost of sales and services, customer support and sales and marketing:
Costs of sales and services, exclusive of depreciation and amortization		0		0
Reclassification | INAP COLO
Revenues:
Total revenues		(51,344)		(156,727)
Cost of sales and services, customer support and sales and marketing:
Costs of sales and services, exclusive of depreciation and amortization		(20,785)		(67,661)
Reclassification | INAP CLOUD
Revenues:
Total revenues		(17,563)		(53,955)
Cost of sales and services, customer support and sales and marketing:
Costs of sales and services, exclusive of depreciation and amortization		(4,160)		(12,758)
Reclassification | INAP US
Revenues:
Total revenues		52,970		162,544
Cost of sales and services, customer support and sales and marketing:
Costs of sales and services, exclusive of depreciation and amortization		18,906		63,589
Reclassification | INAP INTL
Revenues:
Total revenues		15,937		48,138
Cost of sales and services, customer support and sales and marketing:
Costs of sales and services, exclusive of depreciation and amortization		$ 6,039		$ 16,830