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Debt Schedule Of Financing Fees (Details) - USD ($) | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 25, 2016 | Dec. 27, 2015 | Sep. 25, 2016 | Mar. 31, 2014 | Mar. 30, 2014
Schedule Of Financing Fees [Line Items] |  |  |  |  |
Class of Warrant or Right, Outstanding | 6,000,000 |  |  |  |
Unamortized Debt Issuance Expense | $ 25,373,000 |  | $ 26,271,000 |  |
Amortization Of Present Value Discount- Current Fiscal Year | 4,142,000 |  |  |  |
Amortization Of Present Value Discount- Next Fiscal Year | 4,223,000 |  |  |  |
Amortization Of Present Value Discount- Year 3 | 4,050,000 |  |  |  |
Amortization Of Present Value Discount- Year 4 | 4,079,000 |  |  |  |
Amortization Of Present Value Discount- Year 5 | $ 4,269,000 |  |  |  |
Investment Warrants, Exercise Price | $ 4.19 |  |  |  |
Warrant liability fair value | $ 8,665,000 |  |  |  | $ 16,930,000
Gains (Losses) on Extinguishment of Debt | $ 0 | $ (525,000) |  |  |
New 1st Lien Term Loan [Member] |  |  |  |  |
Schedule Of Financing Fees [Line Items] |  |  |  |  |
Debt Instrument, Unamortized Discount |  |  |  | $ 5,000,000 |

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