COMPREHENSIVE INCOME (LOSS) (Schedule of Changes in Accumulated Other Comprehensive Income by Component (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 751,443
Ending balance	776,387
Defined Benefit Pension Items
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	9
Other comprehensive income (loss)	(7)
Ending balance	2
Foreign Currency Items
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(47,911)
Other comprehensive income (loss)	11,244
Ending balance	(36,667)
Total
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(47,902)
Other comprehensive income (loss)	11,237
Ending balance	$ (36,665)