Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Nov. 07, 2013 Common Stock	Nov. 07, 2013 Restricted Stock
Document Information [Line Items]
Entity Registrant Name	KNOLL INC
Entity Central Index Key	0001011570
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		48,275,175	1,108,488