RESTRUCTURING EXPENSE (Details) - Continuing Lease Obligations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Changes in restructuring expenses
Balance, beginning of period	$ 178	$ 462	$ 906
Restructuring expense (income)	(29)	(13)	(56)
Payments	(149)	(297)	(500)
Balance, end of period	$ 0	$ 178	$ 462