Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2017	May 08, 2017
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	Mar. 31, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q1
Amendment Flag	false
Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		49,358,830
Restricted stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		891,610