BUSINESS REORGANIZATION EXPENSES REORGANIZATION EXPENSES BY PLAN (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) position	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Restructuring Cost and Reserve [Line Items]
Business reorganization expenses	$ 5,828	$ 3,789	$ 5,440
2015 Restructuring Plan [Member]
Restructuring Cost and Reserve [Line Items]
Business reorganization expenses	$ 2,060	0	0
Restructuring and Related Cost, Number of Positions Eliminated | position	63
Previous Years Reorganization Plan [Member]
Restructuring Cost and Reserve [Line Items]
Business reorganization expenses	$ 3,768	$ 3,789	$ 5,440