DERIVATIVES (INCOME STATEMENT CLASSIFICATION) (DETAILS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Interest Expense.	$ 13,734	$ 7,943	$ 7,538
Other nonoperating income expense	1,869	9,555	$ 2,157
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:	(14,336)	(16,438)
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	(22,792)	(28,025)
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:	(70)	(312)
Designated as Hedging Instruments [Member] | Interest Rate | Cash Flow [Member] | Reclassification from accumulated other comprehensive income | Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Interest Expense.	(115)	(534)
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	$ 1,350	$ (5,826)