Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
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-Article 12
-Section 13
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Fair value of the assets less the liabilities of a derivative or group of derivatives.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
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Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

The number of derivative instruments of a particular group held by the entity.

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-Name Accounting Standards Codification
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-SubTopic 10
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Details) € in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 31, 2017 EUR (€)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Apr. 05, 2016 EUR (€) contracts	Nov. 10, 2015 EUR (€) contracts
Fair Value, By Balance Sheet Grouping Disclosure Information [Line Items]
Repayments of Debt \| €		€ 50,000
Fair Value, Inputs, Level 2 [Member]
Fair Value, By Balance Sheet Grouping Disclosure Information [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ (1,783)		$ (10,213)	$ 4,848
Currency Swap [Member]
Fair Value, By Balance Sheet Grouping Disclosure Information [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net			(10,213)	4,848
Currency Swap [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value, By Balance Sheet Grouping Disclosure Information [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ (1,380)
Forward Contracts [Member]
Fair Value, By Balance Sheet Grouping Disclosure Information [Line Items]
Derivative, Number of Instruments Held	0
Interest Rate Swap [Member]
Fair Value, By Balance Sheet Grouping Disclosure Information [Line Items]
Derivative, Number of Instruments Held \| contracts						3
Interest Rate Swap [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value, By Balance Sheet Grouping Disclosure Information [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ (403)		$ 0	$ 0
2018 Euro Term Loan [Member] \| Interest Rate Swap [Member]
Fair Value, By Balance Sheet Grouping Disclosure Information [Line Items]
Derivative, Number of Instruments Held \| contracts					4
2018 Euro Term Loan [Member] \| Interest Rate Swap, Apr 5, 2016, 250,800,000 EUR [Member]
Fair Value, By Balance Sheet Grouping Disclosure Information [Line Items]
Derivative, Notional Amount \| €					€ 200,800
Derivative, Fair Value, Net	(292)
2019 Euro Term Loan [Member] \| Interest Rate Swap, Nov 10, 2015, 235,335,000 EUR [Member]
Fair Value, By Balance Sheet Grouping Disclosure Information [Line Items]
Derivative, Notional Amount \| €						€ 235,335
Derivative, Fair Value, Net	(1,512)
2021 Euro Term Loan [Member] \| Interest Rate Swap [Member]
Fair Value, By Balance Sheet Grouping Disclosure Information [Line Items]
Derivative, Number of Instruments Held \| contracts					5
2021 Euro Term Loan [Member] \| Interest Rate Swap, Apr 5, 2016, 468,800,000 EUR [Member]
Fair Value, By Balance Sheet Grouping Disclosure Information [Line Items]
Derivative, Notional Amount \| €					€ 468,800
Derivative, Fair Value, Net	$ (1,795)