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Allowance for Doubtful Accounts (Tables) | 12 Months Ended
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Sep. 30, 2017
Receivables [Abstract] |
Schedule of Allowance for Doubtful Accounts | Changes in the allowance for doubtful accounts are summarized below (in thousands):
Description | Balances at Beginning of Period |  | Charged/ (Credited) to Costs and Expenses |  | Asset Write-Offs, Less Recoveries |  | Balances at End of Period
Fiscal Year Ended September 26, 2015 | 25,212 |  |  | 741 |  |  | (6,657 | ) |  | 19,296 |
Fiscal Year Ended September 24, 2016 | 19,296 |  |  | 6,041 |  |  | (4,268 | ) |  | 21,069 |
Fiscal Year Ended September 30, 2017 | 21,069 |  |  | 2,921 |  |  | (2,554 | ) |  | 21,436 |

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