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Income Taxes Tax Receivable (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2014
Tax Receivable Agreement [Roll Forward]      
Beginning balance as of June 30, $ 93,501    
Payable Pursuant To Tax Receivable Agreement, Total 93,750 $ 96,470 $ 13,636
Payable pursuant to tax receivable agreement, current portion (4,189) (2,969)  
Ending balance as of June 30, 89,561 93,501  
Follow-On Offering [Member]      
Tax Receivable Agreement [Roll Forward]      
Additions to tax receivable agreement: 0 34,028  
Tender Offer [Member]      
Tax Receivable Agreement [Roll Forward]      
Additions to tax receivable agreement: 0 23,969  
Secondary Offering [Member]      
Tax Receivable Agreement [Roll Forward]      
Additions to tax receivable agreement: $ 0 $ 24,837