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Related Party Transactions (Narrative) (Details) - M&T Bank - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 30, 2019 | Mar. 31, 2018 | Mar. 30, 2019 | Mar. 31, 2018
Related Party Transaction |  |  |  |
Related Party US Revolving Credit Facility Interest Percentage | 12.00% |  | 12.00% |
Credit Extension on Routine Purchases |  |  |  |
Related Party Transaction |  |  |  |
Related Party Transaction, Amounts of Transaction | $ 6,726 | $ 5,759 | $ 11,078 | $ 11,218
Interest Rate Swaps |  |  |  |
Related Party Transaction |  |  |  |
Related Party Transaction, Amounts of Transaction |  |  | 15,000 |
Lease Agreements |  |  |  |
Related Party Transaction |  |  |  |
Related Party Transaction, Amounts of Transaction |  |  | $ 27,678 |

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