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Foreign Exchange Forward Contracts (Narratives) (Details) - USD ($)
3 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Derivative [Line Items]    
Foreign currency transactions realized loss $ 600,000 $ 200,000
Not Designated as Hedging Instrument | Forward Foreign Currency Contracts    
Derivative [Line Items]    
Notional principal amount of forward foreign currency contracts $ 9,600,000  
Maximum maturities for contracts 60 days  
Derivative instruments outstanding   $ 0