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Derivative Instruments and Hedging Activities - Fair Value in the Condensed Consolidated Balance Sheets (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
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 $ 62,000 $ 47,100
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) $ 736  
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)   $ (1,319)
Minimum    
Derivatives, Fair Value [Line Items]    
Contract maturity 1 month  
Maximum    
Derivatives, Fair Value [Line Items]    
Contract maturity 12 months