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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Apr. 01, 2016
Oct. 02, 2015
Apr. 03, 2015
Property, plant and equipment, accumulated depreciation $ 122,369 $ 116,902 $ 111,439
Class A [Member]      
Common stock, shares issued 8,808,905 8,770,612 8,792,341
Common stock, shares outstanding 8,808,905 8,770,612 8,792,341
Treasury stock, shares 33,599 33,241 26,510
Class B [Member]      
Common stock, shares issued 1,212,382 1,212,382 1,212,382
Common stock, shares outstanding 1,212,382 1,212,382 1,212,382