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Statement of Stockholders' Equity (Deficit) (USD $) Share data in Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |
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Sep. 30, 2012 | Sep. 25, 2011 | Sep. 30, 2012 | Sep. 25, 2011 | Sep. 26, 2010 | Sep. 30, 2012 Common Stock [Member] | Sep. 25, 2011 Common Stock [Member] | Sep. 26, 2010 Common Stock [Member] | Sep. 27, 2009 Common Stock [Member] | Sep. 30, 2012 Common Class B [Member] | Sep. 25, 2011 Common Class B [Member] | Sep. 26, 2010 Common Class B [Member] | Sep. 27, 2009 Common Class B [Member] | Sep. 30, 2012 Common Stock [Member] | Sep. 25, 2011 Common Stock [Member] | Sep. 26, 2010 Common Stock [Member] | Sep. 30, 2012 Common Stock [Member] | Sep. 30, 2012 Common Class B [Member] | Sep. 25, 2011 Common Class B [Member] | Sep. 26, 2010 Common Class B [Member] | Sep. 30, 2012 Common Class B [Member] | Sep. 30, 2012 Additional Paid-in Capital [Member] | Sep. 25, 2011 Additional Paid-in Capital [Member] | Sep. 26, 2010 Additional Paid-in Capital [Member] | Sep. 30, 2012 Additional Paid-in Capital [Member] | Sep. 30, 2012 Retained Earnings [Member] | Sep. 25, 2011 Retained Earnings [Member] | Sep. 26, 2010 Retained Earnings [Member] | Sep. 30, 2012 Retained Earnings [Member] | Sep. 30, 2012 Accumulated Other Comprehensive Income (Loss) [Member] | Sep. 25, 2011 Accumulated Other Comprehensive Income (Loss) [Member] | Sep. 26, 2010 Accumulated Other Comprehensive Income (Loss) [Member] | Sep. 30, 2012 Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balance |  |  | $ (101,346,000) | $ 56,823,000 |  |  |  |  |  |  |  |  |  | $ 89,915,000 | $ 78,554,000 | $ 78,278,000 | $ 523,000 | $ 0 | $ 11,352,000 | $ 11,552,000 | $ 0 | $ 140,887,000 | $ 139,460,000 | $ 137,713,000 | $ 241,039,000 | $ (326,062,000) | $ (179,194,000) | $ (225,299,000) | $ (342,760,000) | $ (6,086,000) | $ 6,651,000 | $ 21,354,000 | $ (13,435,000)
Common Stock, Shares, Outstanding | 52,291 | 44,958 | 52,291 | 44,958 | 44,953 | 52,291 | 44,958 | 39,277 | 39,139 | 0 | 0 | 5,676 | 5,776 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Par Value Change- Common Stock Shares |  |  |  |  |  | 0 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Value, Conversion of Convertible Securities |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 11,352,000 | 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of Stock, Amount Converted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | (11,352,000) | (200,000) |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of Stock, Shares Converted |  |  |  |  |  |  |  |  |  | 0 | (5,676) | (100) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 2,334,000 |
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (12,455,000) | (21,518,000) | (26,179,000) |
Other Comprehensive Income (Loss), Tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,106,000 | 8,781,000 | 9,142,000 |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | (3,027,000) | (8,733,000) | (16,299,000) | (146,681,000) | 46,178,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (16,299,000) |  | 46,178,000 |  |  |  |  |
Net Income (Loss) Attributable to Noncontrolling Interest |  |  | 399,000 | 187,000 | 73,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (399,000) | (187,000) | (73,000) |  |  |  |  |
Change In Par Value |  |  |  |  |  |  |  |  |  |  |  |  |  | (89,466,000) | 0 | 0 |  |  |  |  |  | 89,466,000 | 0 | 0 |  |  |  |  |  |  |  |  |
Share-based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,080,000 | 1,502,000 | 1,911,000 |  |  |  |  |  |  |  |  |
Conversion of Stock, Shares Issued |  |  |  |  |  | 0 | 5,676 | 100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Value, New Issues |  |  |  |  |  |  |  |  |  |  |  |  |  | 74,000 | 209,000 | 190,000 |  |  |  |  |  | 9,606,000 | (75,000) | (164,000) |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  |  |  |  |  | 7,333 | 105 | 95 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchased and Retired During Period, Value |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | $ (200,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchased and Retired During Period, Shares |  |  |  |  |  | 0 | (100) | (57) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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