Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Oct. 28, 2016
Document and Entity Information [Abstract]
Document type	10-Q
Amendment flag	false
Document year focus	2016
Document period focus	Q3
Document period end date	Sep. 30, 2016
Current fiscal year end date	--12-31
Entity central index key	0001488075
Entity filer category	Accelerated Filer
Entity registrant name	Intralinks Holdings, Inc.
Entity common stock shares outstanding		57,755,261