Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Apr. 03, 2015	Oct. 03, 2014	Mar. 28, 2014
Property, plant and equipment, accumulated depreciation	$ 111,439	$ 108,668	$ 105,758
Class A [Member]
Common stock, shares issued	8,792,341	8,769,426	8,752,137
Common stock, shares outstanding	8,792,341	8,769,426	8,752,137
Treasury stock, shares	26,510	11,203	12,523
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

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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