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Derivative Instruments and Hedging Activities - Fair Value in the Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2018	Jun. 30, 2017
Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Notional amount of forward contracts held to sell U.S. dollars in exchange for Canadian dollars	$ 47,300	$ 39,000
Prepaid expenses and other current assets | Cash Flow Hedging | Designated As Hedging Instrument | Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Fair Value Asset (Liability)		$ 1,174
Accounts Payable and Accrued Liabilities | Cash Flow Hedging | Designated As Hedging Instrument | Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Fair Value Asset (Liability)	$ (618)
Minimum
Derivatives, Fair Value [Line Items]
Contract maturity	1 month
Maximum
Derivatives, Fair Value [Line Items]
Contract maturity	12 months

X

- Definition

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

+ References

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

+ Details

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X

- Definition

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

+ References

Reference 1: 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

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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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- Definition

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+ References

No definition available.

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