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Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified | Jun. 28, 2013 | Sep. 28, 2012 | Jun. 29, 2012
--- | --- | --- | ---
Property, plant and equipment, accumulated depreciation | $ 103,253 | $ 98,235 | $ 95,416
Treasury stock, shares | 35,680 | 516 | 516
Class A [Member] |  |  |
Common stock, shares issued | 8,724,070 | 8,676,703 | 8,678,369
Common stock, shares outstanding | 8,724,070 | 8,676,703 | 8,678,369
Class B [Member] |  |  |
Common stock, shares issued | 1,213,334 | 1,215,758 | 1,215,842
Common stock, shares outstanding | 1,213,334 | 1,215,758 | 1,215,842

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