Base Interest Rate Spread- The percentage points added to the appropriate index in determining the base interest rate.

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Interest Rate Margin- The percentage points added to the Base Interest Rate to arrive at the stated rate of interest in the debt agreement.

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Liquidity- Amount of cash availble for immediate use of the company including: cash and cash equivalents, current borrowing capacity under a revolver, etc.

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Warrant liability fair value

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Amount of amortization expense attributable to debt issuance costs.

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Face (par) amount of debt instrument at time of issuance.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of the required periodic payments applied to principal.

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Percentage of principal amount of debt redeemed.

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Amount, after accumulated amortization, of debt discount.

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Represents the aggregate of total long-term debt, including current maturities and short-term debt.

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Weighted average interest rate of debt outstanding.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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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 after 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.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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Debt Schedule of Long-Term Debt Instruments (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
Debt Instrument [Line Items]
Unamortized Debt Issuance Expense	$ (24,421,000)		$ (24,421,000)			$ (26,271,000)
Amortization of Debt Issuance Costs	952,000	$ 1,844,000	1,852,000	$ 3,080,000
Warrant liability fair value	$ 4,382,000		$ 4,382,000		$ 8,665,000	11,760,000		$ 16,930,000
Debt, Weighted Average Interest Rate	9.80%		9.80%
Debt, Long-term and Short-term, Combined Amount	$ 584,918,000		$ 584,918,000			617,167,000
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year	16,988,000		16,988,000
Long-term Debt, Maturities, Repayments of Principal in Year Two	25,000,000		25,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Three	32,734,000		32,734,000
Long-term Debt, Maturities, Repayments of Principal in Year Four	0		0
Long-term Debt, Maturities, Repayments of Principal in Year Five	0		0
Long-term Debt, Maturities, Repayments of Principal after Year Five	510,196,000		510,196,000
Long-term Debt, Current Maturities	29,500,000		29,500,000			25,070,000
Long-term Debt	530,997,000		530,997,000			565,826,000
Liquidity	49,321,000		49,321,000
Future Liquidity- Warrant Exercise Proceeds			25,140,000
Revolving Line Of Credit [Member]
Debt Instrument [Line Items]
Debt, Long-term and Short-term, Combined Amount	$ 0		$ 0			0
Debt Instrument, Interest Rate, Stated Percentage	6.48%		6.48%
Line of Credit Facility, Remaining Borrowing Capacity	$ 33,318,000		$ 33,318,000
Line of Credit [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	40,000,000		40,000,000
Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 400,000,000		$ 400,000,000
Debt Instrument, Interest Rate at Period End	9.50%		9.50%
Debt, Long-term and Short-term, Combined Amount	$ 385,000,000		$ 385,000,000			385,000,000
Debt Instrument, Interest Rate, Stated Percentage	9.50%		9.50%
New 1st Lien Term Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 250,000,000		$ 250,000,000
Debt, Long-term and Short-term, Combined Amount	$ 70,234,000		$ 70,234,000			101,304,000
Debt Instrument, Interest Rate, Stated Percentage	7.25%		7.25%
Debt Instrument, Unamortized Discount							$ 5,000,000
New Second Lien Loan [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 150,000,000		$ 150,000,000
Debt Instrument, Interest Rate at Period End	12.00%		12.00%
Debt, Long-term and Short-term, Combined Amount	$ 129,684,000		$ 129,684,000			$ 130,863,000
Debt Instrument, Interest Rate, Stated Percentage	12.00%		12.00%
Federal Funds Rate [Member] \| Revolving Line Of Credit [Member]
Debt Instrument [Line Items]
Interest Rate Margin	4.50%		4.50%
Federal Funds Rate [Member] \| New 1st Lien Term Loan [Member]
Debt Instrument [Line Items]
Base Interest Rate	0.50%		0.50%
Interest Rate Margin	5.25%		5.25%
Prime Lending Rate [Member] \| New 1st Lien Term Loan [Member]
Debt Instrument [Line Items]
Base Interest Rate	2.00%		2.00%
30 Day LIBOR [Member] \| Revolving Line Of Credit [Member]
Debt Instrument [Line Items]
Interest Rate Margin	5.50%		5.50%
30 Day LIBOR [Member] \| Line of Credit [Member]
Debt Instrument [Line Items]
Base Interest Rate	0.50%		0.50%
30 Day LIBOR [Member] \| New 1st Lien Term Loan [Member]
Debt Instrument [Line Items]
Base Interest Rate	1.00%		1.00%
Interest Rate Margin	6.25%		6.25%
March 16, 2018 through March 15, 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed			104.75%
March 15, 2019 through March 14, 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed			102.38%
After March 15, 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed			100.00%
March 31, 2017 through March 31, 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed			0.00%
March 31, 2018 through March 31, 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed			103.00%
After March 31, 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed			0.00%
Mandatory Payment [Member] \| 1st Lien Agreement [Member]
Debt Instrument [Line Items]
Repayments of Long-term Debt	$ 6,250,000