EQUITY (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Change in equity attributable to Knoll, Inc. stockholders and noncontrolling interests:
Balance, as of December 31, 2013			$ 228,442,000
Noncontrolling interest recognized in the acquisition of HOLLY HUNT®			218,000
Total comprehensive income:
Net earnings			19,032,000	13,962,000
Pension and other post-retirement liability adjustment	64,000	913,000	127,000	1,869,000
Foreign currency translation adjustment	3,730,000	(4,686,000)	(89,000)	(7,211,000)
Total other comprehensive income (loss), net of tax	3,794,000	(3,773,000)	38,000	(5,342,000)
Total comprehensive income	14,633,000	4,115,000	19,070,000	8,620,000
Other changes in equity:
Payment of dividends			(11,363,000)
Proceeds from the issuance of common stock			2,590,000
Stock-based compensation			3,658,000
Other			(1,235,000)
Balance, as of June 30, 2014	235,153,000		235,153,000
Cash dividend (in dollars per share)			$ 120.00
Equity Attributable to Knoll Inc., Stockholders [Member]
Change in equity attributable to Knoll, Inc. stockholders and noncontrolling interests:
Balance, as of December 31, 2013			228,442,000
Noncontrolling interest recognized in the acquisition of HOLLY HUNT®			0
Total comprehensive income:
Pension and other post-retirement liability adjustment			127,000
Total other comprehensive income (loss), net of tax			38,000
Total comprehensive income			19,078,000
Other changes in equity:
Purchase of common stock for treasury			(6,227,000)
Payment of dividends			(11,363,000)
Stock-based compensation			3,658,000
Other			(1,235,000)
Balance, as of June 30, 2014	234,943,000		234,943,000
Noncontrolling Interests [Member]
Change in equity attributable to Knoll, Inc. stockholders and noncontrolling interests:
Balance, as of December 31, 2013			0
Noncontrolling interest recognized in the acquisition of HOLLY HUNT®			218,000
Total comprehensive income:
Pension and other post-retirement liability adjustment			0
Foreign currency translation adjustment			0
Total other comprehensive income (loss), net of tax			0
Total comprehensive income			(8,000)
Other changes in equity:
Purchase of common stock for treasury			0
Payment of dividends			0
Other			0
Balance, as of June 30, 2014	$ 210,000		$ 210,000