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Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified | Mar. 28, 2014 | Sep. 27, 2013 | Mar. 29, 2013
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Property, plant and equipment, accumulated depreciation | $ 105,758 us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | $ 103,314 us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | $ 102,165 us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Treasury stock, shares | 12,523 us-gaap_TreasuryStockShares | 34,766 us-gaap_TreasuryStockShares | 35,680 us-gaap_TreasuryStockShares
Class A [Member] |  |  |
Common stock, shares issued | 8,752,137 us-gaap_CommonStockSharesIssued / us-gaap_StatementScenarioAxis = us-gaap_CommonClassAMember | 8,724,984 us-gaap_CommonStockSharesIssued / us-gaap_StatementScenarioAxis = us-gaap_CommonClassAMember | 8,714,178 us-gaap_CommonStockSharesIssued / us-gaap_StatementScenarioAxis = us-gaap_CommonClassAMember
Common stock, shares outstanding | 8,752,137 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementScenarioAxis = us-gaap_CommonClassAMember | 8,724,984 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementScenarioAxis = us-gaap_CommonClassAMember | 8,714,178 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementScenarioAxis = us-gaap_CommonClassAMember
Class B [Member] |  |  |
Common stock, shares issued | 1,212,382 us-gaap_CommonStockSharesIssued / us-gaap_StatementScenarioAxis = us-gaap_CommonClassBMember | 1,212,420 us-gaap_CommonStockSharesIssued / us-gaap_StatementScenarioAxis = us-gaap_CommonClassBMember | 1,213,664 us-gaap_CommonStockSharesIssued / us-gaap_StatementScenarioAxis = us-gaap_CommonClassBMember
Common stock, shares outstanding | 1,212,382 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementScenarioAxis = us-gaap_CommonClassBMember | 1,212,420 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementScenarioAxis = us-gaap_CommonClassBMember | 1,213,664 us-gaap_CommonStockSharesOutstanding / us-gaap_StatementScenarioAxis = us-gaap_CommonClassBMember

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- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 14 -Article 5 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28,29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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