ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income.
Balance at the beginning of the period			$ 55,951
Balance at the end of the period	$ 63,928		63,928
Total
Accumulated Other Comprehensive Income.
Balance at the beginning of the period	(9,304)	$ 201	(5,683)	$ 624
Unrealized loss on cash flow hedges	(135)	57	(295)	(158)
Amounts reclassified from AOCI	48	56	149	173
Foreign currency translation gain (loss)	400	(3,214)	(3,162)	(3,539)
Balance at the end of the period	(8,991)	(2,900)	(8,991)	(2,900)
Defined Benefit Plan Liability
Accumulated Other Comprehensive Income.
Balance at the beginning of the period	(853)	(190)	(853)	(190)
Balance at the end of the period	(853)	(190)	(853)	(190)
Cash Flow Hedges
Accumulated Other Comprehensive Income.
Balance at the beginning of the period	(61)	(57)	(2)	41
Unrealized loss on cash flow hedges	(135)	57	(295)	(158)
Amounts reclassified from AOCI	48	56	149	173
Balance at the end of the period	(148)	56	(148)	56
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income.
Balance at the beginning of the period	(8,390)	448	(4,828)	773
Foreign currency translation gain (loss)	400	(3,214)	(3,162)	(3,539)
Balance at the end of the period	$ (7,990)	$ (2,766)	$ (7,990)	$ (2,766)