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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2018
Jun. 30, 2017
Allowance for doubtful accounts $ 1,841 $ 1,812
Accumulated depreciation 297,591 236,460
Accumulated amortization $ 153,635 $ 99,198
Treasury stock (shares) 4,769,556  
Class A Common Stock    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock authorized (shares) 500,000,000 500,000,000
Common stock issued (shares) 57,530,733 51,943,281
Common stock outstanding (shares) 52,761,177 51,943,281
Class B Common Stock    
Common stock, par value (in dollars per share) $ 0.000001 $ 0.000001
Common stock authorized (shares) 600,000,000 600,000,000
Common stock issued (shares) 80,335,701 87,298,888
Common stock outstanding (shares) 80,335,701 87,298,888