ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) (Reclassified AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other operating income, net	$ 6,107	$ 9,463	$ 14,858	$ 15,368
Comprehensive income attributable to noncontrolling interest	(9,595)	(4,410)	(11,247)	(8,153)
Income tax expense	$ (7,493)	$ (2,276)	(13,774)	(1,495)
Net (gain) loss from accumulated other comprehensive income			(1,022)		$ (1,510)
Cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net (gain) loss from accumulated other comprehensive income			(1,255)	428	$ 583
Cash flow hedges | Reclassification out of Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Comprehensive income attributable to noncontrolling interest			521	(320)
Income tax expense			488	(166)
Cash flow hedges | Reclassification out of Accumulated Other Comprehensive Income | Foreign currency exchange contracts
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other operating income, net			(1,730)	341
Cash flow hedges | Reclassification out of Accumulated Other Comprehensive Income | Foreign currency option contracts
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other operating income, net			$ (534)	$ 573