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Goodwill and Other Identifiable Intangible Assets (Net Identifiable Intangible Assets) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2018
Mar. 31, 2017
Finite-lived Intangible Assets [Roll Forward]        
Balance as of June 30, 2017     $ 101,513  
Additions     57,000  
Amortization expense $ (5,103) $ (4,217) (15,600) $ (11,537)
Foreign currency translation adjustment     813  
Balance as of March 31, 2018 $ 143,726   $ 143,726  
Minimum [Member]        
Finite-Lived Intangible Assets [Line Items]        
Weighted average useful life     4 years  
Maximum [Member]        
Finite-Lived Intangible Assets [Line Items]        
Weighted average useful life     12 years