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

Number of Financial Institutions, International Swaps and Derivative Associated Agreements with Company

+ References

No definition available.

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- Definition

Identification of the specific currency to be purchased upon settlement or exercise of the foreign currency derivative.

+ References

No definition available.

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- Definition

Identification of the specific currency to be sold upon settlement or exercise of the foreign currency derivative.

+ References

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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

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- Definition

Period remaining until the derivative contract matures, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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FOREIGN CURRENCY DERIVATIVES (Details) $ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands	9 Months Ended	12 Months Ended
	Dec. 31, 2017	Mar. 31, 2018 USD ($) financial_institution	Mar. 31, 2018 EUR (€) financial_institution	Mar. 31, 2018 CAD ($) financial_institution	Mar. 31, 2018 GBP (£) financial_institution	Mar. 31, 2018 AUD ($) financial_institution	Mar. 31, 2018 MXN ($) financial_institution	Mar. 31, 2017 EUR (€)	Mar. 31, 2017 GBP (£)
Derivative [Line Items]
Number of financial institutions the company has International Swap and Derivatives Association agreements		4	4	4	4	4	4
Foreign Exchange Forward, EURO
Derivative [Line Items]
Notional amount of non-designated hedge		$ 39,557	€ 32,050,000
Derivative, Currency Sold		Sell EUR
Derivative, Remaining Maturity		1 month
Foreign Exchange Forward, GBP
Derivative [Line Items]
Notional amount of non-designated hedge		$ 15,313			£ 10,900,000
Derivative, Currency Sold		Sell GBP
Derivative, Remaining Maturity		1 month
Foreign Exchange Forward, AUD
Derivative [Line Items]
Notional amount of non-designated hedge		$ 10,456				$ 13,600
Derivative, Currency Sold		Sell AUD
Derivative, Remaining Maturity		1 month
Foreign Exchange Forward, CAD
Derivative [Line Items]
Notional amount of non-designated hedge		$ 1,939		$ 2,500
Derivative, Currency Sold		Sell CAD
Derivative, Remaining Maturity		1 month
Option contracts
Derivative [Line Items]
Notional amount of non-designated hedge			77,800,000.0		23,700,000.0			€ 73,500,000.0	£ 23,900,000.0
Forward contracts
Derivative [Line Items]
Notional amount of non-designated hedge			€ 16,700,000.0		£ 3,700,000.0			€ 11,200,000.0	£ 3,300,000.0
Foreign currency swap contract
Derivative [Line Items]
Notional amount of non-designated hedge		$ 1,599					$ 31,830
Derivative, Currency Bought	Buy MXN
Derivative, Remaining Maturity		3 months
Minimum \| Options
Derivative [Line Items]
Term of contract		6 months
Maximum \| Options
Derivative [Line Items]
Term of contract		12 months
Cash flow hedge \| Forwards
Derivative [Line Items]
Term of contract		3 months