Stock Ownership Plans (Details) (USD $)	12 Months Ended
	Sep. 30, 2012	Sep. 25, 2011	Sep. 26, 2010	Dec. 27, 2009	Sep. 27, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense	$ 1,080,000	$ 1,287,000	$ 1,974,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	4,539,716
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	1,437,270
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 1,310.00	$ 0.00	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period	0	(2,000)	(11,000)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	500,000	0	299,000		453,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	500,000	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0	(297,000)	(143,000)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 0	$ 15,020		$ 19,350
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 1,310	$ 0	$ 15,020	$ 19,350
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	723,000,000	554,000,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options	613,000,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	2 years 3 months 18 days
Share-based Compensation Arrangements by Share-based Payment Award, Options, Other Share Increase (Decrease) in Period, Weighted Average Exercise Price	$ 0	$ 15,020	$ 28,730
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price	$ 0	$ 15,020	$ 15,020
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 1.16	$ 2.57	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	0.00%	0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period	(230,000)	(218,000)	(69,000)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	3,102,000	1,812,000	940,000		1,009,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	1,520,000	1,105,000	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0	(15,000)	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number	1,298,000	552,000	423,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 5.07	$ 8.77
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 3.18	$ 5.07	$ 8.77
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price	$ 5.58
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	457,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options	$ 1,990,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	1 year 3 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	0.00%	0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 0.95	$ 2.00
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Stock Ownership Plan (ESOP), Shares in ESOP	270,000
Supplemental Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Stock Ownership Plan (ESOP), Shares in ESOP	8,700
Exercise Price Range 1-5 [Member] | Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	2,971,125
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number	1,167,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 1.79
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price	$ 2.31
Exercise Price Range- 5-50 [Member] | Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	131,321
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number	131,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 34.59
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price	$ 34.59