ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Balance as of December 31, 2014	$ (8,182)
Other comprehensive income before reclassifications	(12,055)
Balance as of March 31, 2015	(20,237)
Accumulated Translation Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Balance as of December 31, 2014	1,053
Other comprehensive income before reclassifications	(11,730)
Balance as of March 31, 2015	(10,677)
Accumulated Defined Benefit Plans Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Balance as of December 31, 2014	(8,462)
Other comprehensive income before reclassifications	(325)
Balance as of March 31, 2015	(8,787)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Balance as of December 31, 2014	(773)
Other comprehensive income before reclassifications	0
Balance as of March 31, 2015	$ (773)