CHANGE IN ORGANIZATIONAL STRUCTURE - Schedule of Change in Organizational Structure (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Change In Organizational Structure And Realignment Of Expenses [Line Items]
Total revenues	$ 74,201	$ 72,133
INAP COLO
Change In Organizational Structure And Realignment Of Expenses [Line Items]
Total revenues		0
Direct costs of sales and services, exclusive of depreciation and amortization		0
INAP CLOUD
Change In Organizational Structure And Realignment Of Expenses [Line Items]
Total revenues		0
Direct costs of sales and services, exclusive of depreciation and amortization		0
INAP US
Change In Organizational Structure And Realignment Of Expenses [Line Items]
Total revenues	57,076	55,461
Direct costs of sales and services, exclusive of depreciation and amortization	18,435	23,547
INAP INTL
Change In Organizational Structure And Realignment Of Expenses [Line Items]
Total revenues	17,125	16,672
Direct costs of sales and services, exclusive of depreciation and amortization	6,602	5,498
As Previously Reported | INAP COLO
Change In Organizational Structure And Realignment Of Expenses [Line Items]
Total revenues	53,339
Direct costs of sales and services, exclusive of depreciation and amortization	24,806
As Previously Reported | INAP CLOUD
Change In Organizational Structure And Realignment Of Expenses [Line Items]
Total revenues	18,794
Direct costs of sales and services, exclusive of depreciation and amortization	$ 4,239
As Previously Reported | INAP US
Change In Organizational Structure And Realignment Of Expenses [Line Items]
Total revenues		0
Direct costs of sales and services, exclusive of depreciation and amortization		0
As Previously Reported | INAP INTL
Change In Organizational Structure And Realignment Of Expenses [Line Items]
Total revenues		0
Direct costs of sales and services, exclusive of depreciation and amortization		0
Reclassification | INAP COLO
Change In Organizational Structure And Realignment Of Expenses [Line Items]
Total revenues		(53,339)
Direct costs of sales and services, exclusive of depreciation and amortization		(24,806)
Reclassification | INAP CLOUD
Change In Organizational Structure And Realignment Of Expenses [Line Items]
Total revenues		(18,794)
Direct costs of sales and services, exclusive of depreciation and amortization		(4,239)
Reclassification | INAP US
Change In Organizational Structure And Realignment Of Expenses [Line Items]
Total revenues		55,461
Direct costs of sales and services, exclusive of depreciation and amortization		23,547
Reclassification | INAP INTL
Change In Organizational Structure And Realignment Of Expenses [Line Items]
Total revenues		16,672
Direct costs of sales and services, exclusive of depreciation and amortization		$ 5,498