FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS Hedge Accounting Activities (Details) - 3 months ended Jun. 30, 2018 $ in Thousands, € in Millions	EUR (€)	USD ($)
Derivative [Line Items]
Repayments of Debt \| €	€ 110.0
2023 Euro Loan [Member] \| Interest Rate Swap, Apr 26, 2018, 468.8m EUR [Member]
Derivative [Line Items]
Number of Contracts		4
Aggregate Notional Amount		$ 468,800
Fair Value as at June 30, 2018		$ (2,821)
2023 Euro Loan [Member] \| Interest Rate Swap, Apr 5, 2016, 468.8m EUR [Member]
Derivative [Line Items]
Number of Contracts		5
Aggregate Notional Amount		$ 468,800
Fair Value as at June 30, 2018		$ (2,609)
2019 Euro Loan [Member] \| Interest Rate Swap, Apr 5, 2016, 40.8m EUR [Member]
Derivative [Line Items]
Number of Contracts		4
Aggregate Notional Amount		$ 40,800
Fair Value as at June 30, 2018		$ (24)
2021 Euro Loan [Member] \| Interest Rate Swap, Apr 26, 2018, 235.335m EUR [Member]
Derivative [Line Items]
Number of Contracts		3
Aggregate Notional Amount		$ 235,335
Fair Value as at June 30, 2018		$ (932)
2021 Euro Loan [Member] \| Interest Rate Swap, Nov 10, 2015, 235.335m EUR [Member]
Derivative [Line Items]
Number of Contracts		3
Aggregate Notional Amount		$ 235,335
Fair Value as at June 30, 2018		(1,137)
Designated as Hedging Instrument [Member] \| 2023 Euro Loan [Member] \| Interest Rate Swap, Apr 26, 2018, 468.8m EUR [Member]
Derivative [Line Items]
Aggregate Notional Amount		468,800
Designated as Hedging Instrument [Member] \| 2023 Euro Loan [Member] \| Interest Rate Swap, Apr 5, 2016, 468.8m EUR [Member]
Derivative [Line Items]
Aggregate Notional Amount		468,800
Designated as Hedging Instrument [Member] \| 2021 Euro Loan [Member] \| Interest Rate Swap, Apr 26, 2018, 235.335m EUR [Member]
Derivative [Line Items]
Aggregate Notional Amount		78,367
Designated as Hedging Instrument [Member] \| 2021 Euro Loan [Member] \| Interest Rate Swap, Nov 10, 2015, 235.335m EUR [Member]
Derivative [Line Items]
Aggregate Notional Amount		$ 78,367

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611

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-Section 50
-Paragraph 1A
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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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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
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