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Income Taxes - Narrative (Details) - USD ($)
$ in Millions
9 Months Ended
Mar. 31, 2017
Jun. 30, 2016
Income Taxes [Line Items]    
Gross unrecognized tax benefits $ 2.2 $ 2.1
Unrecognized tax benefits that would impact effective tax rate if recognized 1.4  
Income tax penalties and interest accrued $ 1.1  
Effective tax rate 35.60%  
Federal statutory income tax rate 35.00%  
Minimum    
Income Taxes [Line Items]    
Open tax year 2012