GOODWILL AND INTANGIBLES ASSETS, NET Carrying Amount of Goodwill by Reportable Segment (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Goodwill [Roll Forward]
Balance at beginning of period	$ 142,113
Foreign currency translation adjustment	956
Goodwill acquired	194,066
Balance at end of period	337,135
Office Segment
Goodwill [Roll Forward]
Balance at beginning of period	36,220
Foreign currency translation adjustment	(203)
Goodwill acquired	0
Balance at end of period	36,017
Lifestyle Segment
Goodwill [Roll Forward]
Balance at beginning of period	105,893
Foreign currency translation adjustment	1,159
Goodwill acquired	194,066
Balance at end of period	$ 301,118