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Debt Schedule Of Financing Fees (Details) - USD ($)
 3 Months Ended 6 Months Ended
Mar. 27, 2016
Mar. 27, 2016
Mar. 29, 2015
Dec. 27, 2015
Sep. 27, 2015
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 $ 28,713,000 $ 28,713,000          
Amortization Of Present Value Discount- Current Fiscal Year 4,864,000 4,864,000          
Amortization Of Present Value Discount- Next Fiscal Year 4,240,000 4,240,000          
Amortization Of Present Value Discount- Year 3 4,329,000 4,329,000          
Amortization Of Present Value Discount- Year 4 4,109,000 4,109,000          
Amortization Of Present Value Discount- Year 5 4,076,000 $ 4,076,000          
Investment Warrants, Exercise Price   $ 4.19          
Warrant liability fair value 4,230,000 $ 4,230,000   $ 4,167,000 $ 4,240,000   $ 16,930,000
Gains (Losses) on Extinguishment of Debt $ (725,000) $ (1,250,000) $ 0        
New 1st Lien Term Loan [Member]              
Schedule Of Financing Fees [Line Items]              
Debt Instrument, Unamortized Discount           $ 5,000,000