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Debt Schedule Of Financing Fees (Details) - USD ($) | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 26, 2017 | Mar. 27, 2016 | Mar. 26, 2017 | Mar. 27, 2016 | Dec. 25, 2016 | Sep. 25, 2016 | Mar. 31, 2014 | Mar. 30, 2014
Schedule Of Financing Fees [Line Items] |  |  |  |  |  |  |  |
Class of Warrant or Right, Outstanding | 6,000,000 |  | 6,000,000 |  |  |  |  |
Unamortized Debt Issuance Expense | $ 24,421,000 |  | $ 24,421,000 |  |  | $ 26,271,000 |  |
Amortization Of Present Value Discount- Current Fiscal Year | 4,114,000 |  | 4,114,000 |  |  |  |  |
Amortization Of Present Value Discount- Next Fiscal Year | 4,206,000 |  | 4,206,000 |  |  |  |  |
Amortization Of Present Value Discount- Year 3 | 4,051,000 |  | 4,051,000 |  |  |  |  |
Amortization Of Present Value Discount- Year 4 | 4,103,000 |  | 4,103,000 |  |  |  |  |
Amortization Of Present Value Discount- Year 5 | 4,300,000 |  | $ 4,300,000 |  |  |  |  |
Investment Warrants, Exercise Price |  |  | $ 4.19 |  |  |  |  |
Warrant liability fair value | 4,382,000 |  | $ 4,382,000 |  | $ 8,665,000 | $ 11,760,000 |  | $ 16,930,000
Amortization of Debt Issuance Costs | $ 952,000 | $ 1,844,000 | 1,852,000 | $ 3,080,000 |  |  |  |
Gains (Losses) on Extinguishment of Debt |  | $ (725,000) | $ 0 | $ 1,250,000 |  |  |  |
New 1st Lien Term Loan [Member] |  |  |  |  |  |  |  |
Schedule Of Financing Fees [Line Items] |  |  |  |  |  |  |  |
Debt Instrument, Unamortized Discount |  |  |  |  |  |  | $ 5,000,000 |

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- Definition Amount of amortization expense attributable to debt issuance costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(8)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(8)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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