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Derivative Instruments and Hedging Activities (Fair Value of Derivative Instruments in the Condensed Consolidated Balance Sheets) (Details) - Foreign Exchange Forward - USD ($)
$ in Thousands
Dec. 31, 2015
Jun. 30, 2015
Derivatives, Fair Value [Line Items]    
Notional amount of forward contracts held to sell U.S. dollars in exchange for Canadian dollars $ 57,300 $ 76,400
Accounts Payable and Accrued Liabilities | Cash Flow Hedging | Designated As Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Fair Value Asset (Liability) $ (4,479)  
Prepaid Expenses and Other Current Assets | Cash Flow Hedging | Designated As Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Fair Value Asset (Liability)   $ 273