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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Dec. 27, 2013
Sep. 27, 2013
Dec. 28, 2012
Property, plant and equipment, accumulated depreciation $ 105,031 $ 103,314 $ 101,525
Treasury stock, shares 14,511 34,766 35,680
Class A [Member]
     
Common stock, shares issued 8,750,149 8,724,984 8,714,178
Common stock, shares outstanding 8,750,149 8,724,984 8,714,178
Class B [Member]
     
Common stock, shares issued 1,212,420 1,212,420 1,213,664
Common stock, shares outstanding 1,212,420 1,212,420 1,213,664