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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Oct. 03, 2014
Sep. 27, 2013
Property, plant and equipment, accumulated depreciation $ 108,668 $ 103,314
Treasury stock, shares 11,203 34,766
Class A [Member]
   
Common stock, shares issued 8,769,426 8,724,984
Common stock, shares outstanding 8,769,426 8,724,984
Class B [Member]
   
Common stock, shares issued 1,212,382 1,212,420
Common stock, shares outstanding 1,212,382 1,212,420