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Allowance for Doubtful Accounts (Tables)
 12 Months Ended
Jun. 30, 2017
Receivables [Abstract]  
Changes in Carrying Amount of Allowance For Doubtful Accounts
Balance as of June 30, 2014
$
4,727

Bad debt expense
5,346

Write-off /adjustments
(4,086
)
Balance as of June 30, 2015
5,987

Bad debt expense
5,908

Write-off /adjustments
(5,155
)
Balance as of June 30, 2016
6,740

Bad debt expense
5,929

Write-off /adjustments
(6,350
)
Balance as of June 30, 2017
$
6,319