RESTRUCTURING CHARGES - Summary of Changes in Restructuring Liability (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013 Office Segment [Member]	Jun. 30, 2014 Office Segment [Member]	Dec. 31, 2013 Studio Segment [Member]	Jun. 30, 2014 Studio Segment [Member]	Jun. 30, 2014 Coverings Segment [Member]
Restructuring Reserve [Roll Forward]
Balance, as of December 31, 2013			$ 5,696			$ 2,721		$ 2,975	$ 0
Restructuring Charges	203	0	203	0	2,700	203	3,000
Payments			(4,659)			(2,877)		(1,782)	0
Balance, as of June 30, 2014	$ 1,240		$ 1,240		$ 2,721	$ 47	$ 2,975	$ 1,193	$ 0