Document and Entity Information	3 Months Ended
	Mar. 31, 2016 shares
Document and Entity Information Abstract
Entity Registrant Name	Internap Corp
Entity Central Index Key	0001056386
Trading Symbol	inap
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding	56,350,789
Document Type	10-Q
Document Period End Date	Mar. 31, 2016
Amendment Flag	false
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q1