CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total Knoll, Inc. Stockholders' Equity	Noncontrolling Interests
Beginning Balance at Dec. 31, 2015	$ 255,474	$ 488	$ 47,165	$ 244,947	$ (37,318)	$ 255,282	$ 192
Increase (Decrease) in Stockholders' Equity
Net earnings	82,114			82,084		82,084	30
Other comprehensive loss	(6,085)				(6,085)	(6,085)
Shares issued for consideration:
Exercise of stock options	2,772	2	2,770			2,772
Shares issued under stock incentive plan		3	(3)
Shares issued to Board of Directors in lieu of cash	75		75			75
Stock-based compensation	10,469		10,603	(134)		10,469
Cash dividend (in dollars per share)	(29,886)			(29,886)		(29,886)
Purchase of common stock	(5,464)	(2)	(5,462)			(5,464)
Ending Balance at Dec. 31, 2016	309,469	491	55,148	297,011	(43,403)	309,247	222
Increase (Decrease) in Stockholders' Equity
Net earnings	80,192			80,163		80,163	29
Other comprehensive loss	(371)				(371)	(371)
Shares issued for consideration:
Exercise of stock options	472		472			472
Shares issued under stock incentive plan	4	7	(3)			4
Shares issued to Board of Directors in lieu of cash	125		125			125
Stock-based compensation	9,658	(1)	9,659			9,658
Cash dividend (in dollars per share)	(29,870)			(29,870)		(29,870)
Purchase of common stock	(10,950)	(4)	(10,946)			(10,950)
Ending Balance at Dec. 31, 2017	358,729	493	54,455	347,304	(43,774)	358,478	251
Increase (Decrease) in Stockholders' Equity
Net earnings	73,255			73,248		73,248	7
Other comprehensive loss	(19,859)				(19,859)	(19,859)
Shares issued for consideration:
Shares issued under stock incentive plan	2	3	(1)			2
Shares issued to Board of Directors in lieu of cash	62		62			62
Stock-based compensation	8,646		8,646			8,646
Cash dividend (in dollars per share)	(29,879)			(29,879)		(29,879)
Purchase of common stock	(4,394)	(2)	(4,392)			(4,394)
Other	(52)						(52)
Ending Balance at Dec. 31, 2018	$ 386,510	$ 494	$ 58,770	$ 395,434	$ (68,394)	$ 386,304	$ 206