CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Income Statement [Abstract]
Net sales	$ 265,797		$ 214,312		$ 495,128		$ 414,898
Cost of sales	168,594		144,431		321,449		281,390
Gross profit	97,203		69,881		173,679		133,508
Selling, general, and administrative expenses	74,805		57,473		139,455		110,806
Restructuring Charges	203		0		203		0
Operating profit	22,195	[1]	12,408	[1]	34,021	[1]	22,702	[1]
Interest expense	1,944		1,517		3,615		3,012
Other (income) expense, net	2,700		(2,206)		196		(3,497)
Income before income tax expense	17,551		13,097		30,210		23,187
Income tax expense	6,712		5,209		11,178		9,225
Net earnings	10,839		7,888		19,032		13,962
Net losses attributable to noncontrolling interests	(14)		0		(8)		0
Net earnings attributable to Knoll, Inc. stockholders	10,853		7,888		19,040		13,962
Net earnings per common share attributable to Knoll, Inc. stockholders:
Basic (in dollars per share)	$ 0.23		$ 0.17		$ 0.40		$ 0.30
Diluted (in dollars per share)	$ 0.23		$ 0.17		$ 0.40		$ 0.29
Dividends per share (in dollars per share)	$ 0.12		$ 0.12		$ 0.24		$ 0.24
Weighted-average number of common shares outstanding:
Basic	47,365,780		46,897,309		47,283,396		46,865,438
Diluted	47,974,559		47,593,106		48,012,233		47,582,972
Net earnings	10,839		7,888		19,032		13,962
Other comprehensive income (loss):
Foreign currency translation adjustment	3,730		(4,686)		(89)		(7,211)
Pension and other post-retirement liability adjustment, net of tax	64		913		127		1,869
Total other comprehensive income (loss), net of tax	3,794		(3,773)		38		(5,342)
Total comprehensive income	14,633		4,115		19,070		8,620
Comprehensive losses attributable to noncontrolling interests			0				0
Comprehensive income attributable to Knoll, Inc. stockholders	$ 14,647		$ 4,115		$ 19,078		$ 8,620

[1] The Company does not allocate interest expense or other (income) expense, net to the reportable segments.(3) Office operating profit includes $0.2 million of restructuring expenses incurred during the three months ended June 30, 2014. These restructuring expenses were incurred to better utilize the Company's manufacturing capacity.