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Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jan. 02, 2015	Oct. 03, 2014	Dec. 27, 2013
Property, plant and equipment, accumulated depreciation	$ 109,915us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	$ 108,668us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	$ 105,031us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Class A [Member]
Common stock, shares outstanding	8,790,733us-gaap_CommonStockSharesOutstanding / us-gaap_StatementScenarioAxis = us-gaap_CommonClassAMember	8,769,426us-gaap_CommonStockSharesOutstanding / us-gaap_StatementScenarioAxis = us-gaap_CommonClassAMember	8,750,149us-gaap_CommonStockSharesOutstanding / us-gaap_StatementScenarioAxis = us-gaap_CommonClassAMember
Treasury stock, shares	28,118us-gaap_TreasuryStockShares / us-gaap_StatementScenarioAxis = us-gaap_CommonClassAMember	11,203us-gaap_TreasuryStockShares / us-gaap_StatementScenarioAxis = us-gaap_CommonClassAMember	14,511us-gaap_TreasuryStockShares / us-gaap_StatementScenarioAxis = us-gaap_CommonClassAMember
Class B [Member]
Common stock, shares outstanding	1,212,382us-gaap_CommonStockSharesOutstanding / us-gaap_StatementScenarioAxis = us-gaap_CommonClassBMember	1,212,382us-gaap_CommonStockSharesOutstanding / us-gaap_StatementScenarioAxis = us-gaap_CommonClassBMember	1,212,420us-gaap_CommonStockSharesOutstanding / us-gaap_StatementScenarioAxis = us-gaap_CommonClassBMember

X

- Definition

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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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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