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Derivatives and Hedging Activities (Narrative) (Details) - USD ($)
3 Months Ended 6 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Jun. 30, 2018
Foreign Exchange Contract [Member]          
Derivative [Line Items]          
Notional amount of foreign currency contracts outstanding $ 91,800,000   $ 91,800,000   $ 74,600,000
Interest Rate Swap [Member]          
Derivative [Line Items]          
Notional amount of foreign currency contracts outstanding 50,000,000   50,000,000    
Ineffective portion of cash flow hedge $ 0 $ 0 $ 0 $ 0