RESTRUCTURING CHARGES - Summary of Changes in Restructuring Liability (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2014	$ 1,062
Payments	(236)
Balance as of March 31, 2015	826
Office Segment
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2014	1,046
Payments	(228)
Balance as of March 31, 2015	818
Coverings Segment
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2014	0
Payments	0
Balance as of March 31, 2015	0
Coverings Segment
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2014	16
Payments	(8)
Balance as of March 31, 2015	$ 8