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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Jul. 01, 2016
Oct. 02, 2015
Jul. 03, 2015
Property, plant and equipment, accumulated depreciation $ 124,227 $ 116,902 $ 114,362
Class A [Member]      
Common stock, shares issued 8,816,675 8,770,612 8,789,269
Common stock, shares outstanding 8,816,675 8,770,612 8,789,269
Treasury stock, shares 33,561 33,241 39,948
Class B [Member]      
Common stock, shares issued 1,212,344 1,212,382 1,212,382
Common stock, shares outstanding 1,212,344 1,212,382 1,212,382