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Fair Value Measurements (Narratives) (Details) - USD ($)
3 Months Ended 9 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2017
Mar. 31, 2016
Jun. 30, 2016
Assets          
Transfers of assets between Level 1 and Level 2 $ 0   $ 0    
Transfers of Liabilities between Level 1 and Level 2 0   0    
Long-term debt, fair value 96,000,000   96,000,000   $ 55,500,000
Intangible asset and goodwill impairment 0 $ 0 0 $ 0  
Foreign Currency Contracts          
Assets          
Foreign currency contracts, fair value $ 96,000,000   $ 96,000,000