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Allowance for Doubtful Accounts - Changes In Carrying Amount (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Allowance for Doubtful Accounts Receivable [Roll Forward]      
Balance as of beginning of the period $ 9,741 $ 6,319 $ 6,740
Bad debt expense 13,461 9,942 5,929
Write-off /adjustments (6,191) (6,520) (6,350)
Balance as of end of the period 17,011 9,741 $ 6,319
Unbilled receivables $ 56,100 $ 55,500