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