ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME (Schedule of Accumulated Other Comprehensive Income, Net of Tax) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ (8,182)	$ 12,797
Other comprehensive loss	(5,610)	(20,979)
Amounts reclassified from accumulated other comprehensive income	2,137	0
Other comprehensive (loss) income	(3,473)	(20,979)	$ 6,385
Ending balance	(11,655)	(8,182)	12,797
Foreign currency translation adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	1,053	14,952
Other comprehensive loss	(11,342)	(13,899)
Amounts reclassified from accumulated other comprehensive income	0	0
Other comprehensive (loss) income	(11,342)	(13,899)
Ending balance	(10,289)	1,053	14,952
Defined benefit pension plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(8,462)	(2,153)
Other comprehensive loss	7,096	(6,309)
Amounts reclassified from accumulated other comprehensive income	0	0
Other comprehensive (loss) income	7,096	(6,309)
Ending balance	(1,366)	(8,462)	(2,153)
Change in unrealized (loss) gain on investments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(773)	(2)
Other comprehensive loss	(1,364)	(771)
Amounts reclassified from accumulated other comprehensive income	2,137	0
Other comprehensive (loss) income	773	(771)
Ending balance	$ 0	$ (773)	$ (2)