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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands | Jun. 30, 2018 | Sep. 30, 2017 | Jun. 24, 2017
--- | --- | --- | ---
Accounts receivable allowance for doubtful accounts | $ 22,021 | $ 21,436 | $ 21,277
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 | $ 0.01
Common Stock |  |  |
Common stock, shares outstanding (in shares) | 12,145,135 | 12,160,023 | 12,160,023
Class A Common Stock |  |  |
Common stock, shares outstanding (in shares) | 38,373,324 | 38,019,736 | 37,933,970
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 | $ 0.01
Class B Common Stock |  |  |
Common stock, shares outstanding (in shares) | 1,652,262 | 1,652,262 | 1,652,262
Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 | $ 0.01

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