Condensed Consolidated Statements of Cash Flows - Unaudited (USD $)	9 Months Ended
	Jun. 30, 2013	Jun. 24, 2012
OPERATING ACTIVITIES:
Net loss	$ (20,521,000)	$ (33,911,000)
Adjustments to reconcile net loss to cash provided by operating activities:
Depreciation and amortization	29,476,000	29,378,000
Stock-based compensation	741,000	1,492,000
Gain on short- and long-term investments	(272,000)	(567,000)
Loss on disposal of assets	125,000	388,000
Asset impairment charges (Notes 11 and 12)		8,451,000
Non-cash interest expense	2,570,000	4,485,000
Gain on extinguishment of debt (Note 7)	(4,986,000)	(5,897,000)
Severance and site consolidation expenses (Note 10)		(1,741,000)
Changes in operating assets and liabilities	(4,065,000)	33,531,000
Cash provided by operating activities	3,068,000	35,609,000
INVESTING ACTIVITIES:
Capital expenditures	(15,037,000)	(21,595,000)
Proceeds from sale/leaseback of equipment	4,910,000
Change in restricted cash	1,889,000	(16,000)
Purchases of marketable securities	(1,200,000)	(2,813,000)
Sales/maturities of marketable securities	1,472,000	3,791,000
Cash used for investing activities	(7,966,000)	(20,633,000)
FINANCING ACTIVITIES:
Net proceeds from issuance of common stock	280,000
Repayments of capital lease	(511,000)
Repayments of revolving credit line	(176,271,000)	(225,745,000)
Proceeds from revolving credit line	176,271,000	215,336,000
Repayments of debt	(23,470,000)	(37,137,000)
Proceeds from private placement of debt	11,590,000	39,400,000
Debt refinancing costs (Note 7)	(359,000)	(3,926,000)
Cash used for financing activities	(12,470,000)	(12,072,000)
Net (decrease) increase in cash and cash equivalents	(17,368,000)	2,904,000
Cash and cash equivalents at beginning of period	53,653,000	57,554,000
Cash and cash equivalents at end of period	36,285,000	60,458,000
Supplemental cash flow disclosure:
Cash interest paid (net of amount capitalized)	5,314,000	6,114,000
Income taxes paid	45,000	6,000
Assets acquired through capital lease	$ 5,529,000