ACCUMULATED OTHER COMPREHENSIVE LOSS (Changes in Accumulated Other Comprehensive Loss by Component) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Components of Other Accumulated Income, Net of Tax [Roll Forward]
Balance at beginning of period	$ 1,096,282
Other comprehensive income	45,837	$ (77,403)
Balance at end of period	1,116,573
Foreign Currency Translation
Components of Other Accumulated Income, Net of Tax [Roll Forward]
Balance at beginning of period	(252,939)
Other comprehensive income before reclassifications	45,837
Other comprehensive income	45,837
Balance at end of period	(207,102)
Unfunded Pension Liability
Components of Other Accumulated Income, Net of Tax [Roll Forward]
Balance at beginning of period	(1,953)
Other comprehensive income before reclassifications	0
Other comprehensive income	0
Balance at end of period	(1,953)
Accumulated Other Comprehensive Loss
Components of Other Accumulated Income, Net of Tax [Roll Forward]
Balance at beginning of period	(254,892)
Other comprehensive income before reclassifications	45,837
Other comprehensive income	45,837
Balance at end of period	$ (209,055)