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DERIVATIVE FINANCIAL INSTRUMENTS (Details)
$ in Thousands, € in Millions, ¥ in Millions, ZAR in Millions, CAD in Millions, ₩ in Billions
3 Months Ended 6 Months Ended
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2016
JPY (¥)
Jun. 30, 2016
KRW (₩)
Jun. 30, 2016
CAD
Jun. 30, 2016
ZAR
Jun. 30, 2016
EUR (€)
Dec. 31, 2015
USD ($)
Jun. 30, 2015
JPY (¥)
Jun. 30, 2015
EUR (€)
Derivative Financial Instruments [Abstract]                        
Revenue $ 600,475 $ 560,209 $ 1,072,306 $ 1,103,541                
Derivative Financial Instruments [Abstract]                        
Accumulated other comprehensive income (loss) (71,463)   (71,463)             $ (71,269)    
Unrealized Gains (Losses) on Foreign Currency Cash Flow Hedges [Member]                        
Derivative Financial Instruments [Abstract]                        
Accumulated other comprehensive income (loss) (1,800)   (1,800)             300    
Unrealized Gains (Losses) on Foreign Currency Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]                        
Derivative Financial Instruments [Abstract]                        
Revenue (900) 800 (1,100) 2,000                
Cumulative Translation Adjustment [Member]                        
Derivative Financial Instruments [Abstract]                        
Accumulated other comprehensive income (loss) (69,600)   (69,600)             $ (71,600)    
Forward Contracts [Member] | Fair Value Hedges [Member] | Japanese Yen [Member]                        
Derivative Financial Instruments [Abstract]                        
Notional amount 4,800   4,800   ¥ 500              
Forward Contracts [Member] | Fair Value Hedges [Member] | Korean Won [Member]                        
Derivative Financial Instruments [Abstract]                        
Notional amount 10,000   10,000     ₩ 11.5            
Forward Contracts [Member] | Fair Value Hedges [Member] | Canadian Dollars [Member]                        
Derivative Financial Instruments [Abstract]                        
Notional amount 3,000   3,000       CAD 3.9          
Forward Contracts [Member] | Fair Value Hedges [Member] | South African Rand [Member]                        
Derivative Financial Instruments [Abstract]                        
Notional amount 1,100   1,100         ZAR 16.0        
Forward Contracts [Member] | Cash Flow Hedges [Member]                        
Derivative Financial Instruments [Abstract]                        
Fair value (3,300) 100 (3,300) 100                
Forward Contracts [Member] | Cash Flow Hedges [Member] | Japanese Yen [Member]                        
Derivative Financial Instruments [Abstract]                        
Notional amount 28,100 10,600 28,100 10,600 ¥ 2,900           ¥ 1,300  
Forward Contracts [Member] | Cash Flow Hedges [Member] | Euros [Member]                        
Derivative Financial Instruments [Abstract]                        
Notional amount $ 10,000 $ 13,500 $ 10,000 $ 13,500         € 9.0     € 15.0