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Debt Schedule of Payments (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 27, 2015 | Sep. 27, 2015 | Jun. 28, 2015 | Mar. 29, 2015 | Dec. 28, 2014 | Sep. 27, 2015 | Sep. 28, 2014 | Sep. 29, 2013
Schedule Of Debt Payments [Line Items] |  |  |  |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Five |  | $ 0 |  |  |  | $ 0 |  |
Repayments of Long-term Debt |  |  |  |  |  | 83,878,000 | $ 847,750,000 | $ 192,350,000
1st Lien Agreement [Member] |  |  |  |  |  |  |  |
Schedule Of Debt Payments [Line Items] |  |  |  |  |  |  |  |
Repayments of Long-term Debt |  |  |  | $ 10,250,000 | $ 11,250,000 |  |  |
New 1st Lien Term Loan [Member] |  |  |  |  |  |  |  |
Schedule Of Debt Payments [Line Items] |  |  |  |  |  |  |  |
Repayments of Long-term Debt |  | 14,128,000 | $ 10,250,000 |  |  | 45,878,000 |  |
Mandatory Payment [Member] | New 1st Lien Term Loan [Member] |  |  |  |  |  |  |  |
Schedule Of Debt Payments [Line Items] |  |  |  |  |  |  |  |
Repayments of Long-term Debt |  | 6,250,000 | 6,250,000 | 6,250,000 | 6,250,000 | 25,000,000 |  |
Voluntary Payment [Member] | New 1st Lien Term Loan [Member] |  |  |  |  |  |  |  |
Schedule Of Debt Payments [Line Items] |  |  |  |  |  |  |  |
Repayments of Long-term Debt |  | 0 | 4,000,000 | 4,000,000 | 5,000,000 | 13,000,000 |  |
Payment Due To Asset Sale [Member] | New 1st Lien Term Loan [Member] |  |  |  |  |  |  |  |
Schedule Of Debt Payments [Line Items] |  |  |  |  |  |  |  |
Repayments of Long-term Debt |  | 0 | 0 | 0 | 0 | 0 |  |
Payment Due To Asset Sale [Member] | 2nd Lien Agreement [Member] |  |  |  |  |  |  |  |
Schedule Of Debt Payments [Line Items] |  |  |  |  |  |  |  |
Repayments of Long-term Debt | $ 2,300,000 | 5,000,000 |  |  |  |  |  |
Excess Cash Flow Sweep [Member] | New 1st Lien Term Loan [Member] |  |  |  |  |  |  |  |
Schedule Of Debt Payments [Line Items] |  |  |  |  |  |  |  |
Repayments of Long-term Debt |  | $ 7,878,000 | $ 0 | $ 0 | $ 0 | $ 7,878,000 |  |
Excess Cash Flow Sweep [Member] | 2nd Lien Agreement [Member] |  |  |  |  |  |  |  |
Schedule Of Debt Payments [Line Items] |  |  |  |  |  |  |  |
Repayments of Long-term Debt | $ 3,326,000 |  |  |  |  |  |  |

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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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