DERIVATIVES (INCOME STATEMENT CLASSIFICATION) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Revenues	$ 364,936	$ 359,036	$ 1,090,038	$ 1,050,742
Interest Expense.	8,410	3,469	22,634	8,699
Other nonoperating income expense	989	4,416	(8,786)	6,573
Designated as Hedging Instruments [Member] | Foreign Exchange [Member] | Cash Flow [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in other comprehensive income (loss) - effective portion, net of tax:	(2,981)	(3,487)	(10,439)	(10,625)
Designated as Hedging Instruments [Member] | Foreign Exchange [Member] | Cash Flow [Member] | Reclassification from accumulated other comprehensive income
Derivative Instruments, Gain (Loss) [Line Items]
Revenues			(14,300)	(17,709)
Designated as Hedging Instruments [Member] | Foreign Exchange [Member] | Cash Flow [Member] | Reclassification from accumulated other comprehensive income | Revenue
Derivative Instruments, Gain (Loss) [Line Items]
Revenues	(4,085)	(5,812)
Designated as Hedging Instruments [Member] | Interest Rate | Cash Flow [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in other comprehensive income (loss) - effective portion, net of tax:				(69)
Designated as Hedging Instruments [Member] | Interest Rate | Cash Flow [Member] | Reclassification from accumulated other comprehensive income
Derivative Instruments, Gain (Loss) [Line Items]
Interest Expense.				(115)
Not Designated as Hedging Instruments [Member] | Foreign Exchange [Member] | Fair Value [Member] | Other income (expense), net
Derivative Instruments, Gain (Loss) [Line Items]
Other nonoperating income expense	$ (956)	$ (1,186)
Not Designated as Hedging Instruments [Member] | Foreign Exchange [Member] | Fair Value [Member] | Reclassification from accumulated other comprehensive income | Other income (expense), net
Derivative Instruments, Gain (Loss) [Line Items]
Other nonoperating income expense			$ (6,651)	$ (1,545)