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)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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- Definition

Fair value of the assets less the liabilities of a derivative or group of derivatives.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13495-108611

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- Definition

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.

+ References

No definition available.

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5579245-113959

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- Definition

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

+ References

No definition available.

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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS Hedge Accounting Activities (Details) € in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018 EUR (€)	Mar. 31, 2018 USD ($)	Mar. 31, 2018 EUR (€)	Apr. 05, 2016 EUR (€) contracts	Nov. 10, 2015 contracts
Derivative [Line Items]
Repayments of Debt	€ 50,000
2021 Euro Term Loan [Member] \| Interest rate swap [Member]
Derivative [Line Items]
Number of Contracts \| contracts				5
2021 Euro Term Loan [Member] \| Interest Rate Swap, Apr 5, 2016, 468,800,000 EUR [Member]
Derivative [Line Items]
Aggregate Notional Amount				€ 468,800
Fair Value as at March 31, 2018 \| $		$ (2,101)
2018 Euro Term Loan [Member] \| Interest rate swap [Member]
Derivative [Line Items]
Number of Contracts \| contracts				4
2018 Euro Term Loan [Member] \| Interest Rate Swap, Apr 5, 2016, 200,800,000 EUR [Member]
Derivative [Line Items]
Aggregate Notional Amount				€ 150,800
Fair Value as at March 31, 2018 \| $		(160)
2019 Euro Term Loan [Member] \| Interest rate swap [Member]
Derivative [Line Items]
Number of Contracts \| contracts					3
2019 Euro Term Loan [Member] \| Interest Rate Swap, Nov 10, 2015, 235,335,000 EUR [Member]
Derivative [Line Items]
Aggregate Notional Amount			€ 235,335
Fair Value as at March 31, 2018 \| $		$ (1,403)