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Allowance for Doubtful Accounts - Changes In Carrying Amount (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2015
Allowance for Doubtful Accounts Receivable [Roll Forward]      
Balance as of beginning of period $ 6,740 $ 5,987 $ 4,727
Bad debt expense 5,929 5,908 5,346
Write-off /adjustments (6,350) (5,155) (4,086)
Balance as of end of period 6,319 6,740 $ 5,987
Unbilled receivables $ 46,200 $ 35,600