COMPREHENSIVE INCOME Comprehensive Income - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustments	$ 75,972		$ (27,640)		$ (112,932)	$ (28,675)
Accumulated Other Comprehensive Income Loss Foreign Currency Translation Gains Net Of Tax	(230,700)				(230,700)		$ (117,100)
Accumulated Other Comprehensive Income Loss Foreign Currency Translation Losses Net Of Tax	$ (96,700)				(96,700)		$ (95,400)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustments		$ (74,900)		$ (20,600)	(113,700)	(19,700)
Net Investment Hedging | Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax		$ (400)		$ (1,200)	$ (1,200)	$ (3,200)