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Valuation And Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Sep. 28, 2013 | Sep. 29, 2012 | Oct. 01, 2011
Contract Loss Reserve [Member] |  |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Balance at beginning of year | $ 48,428 | $ 45,173 | $ 40,810
Additions charged to costs and expenses | 38,717 | 49,120 | 53,197
Deductions | 43,567 | 47,986 | 48,666
Acquisitions | 638 | 1,801 | 0
Foreign exchange impact and other | 12 | 320 | (168)
Balance at end of year | 44,228 | 48,428 | 45,173
Allowance for Doubtful Accounts [Member] |  |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Balance at beginning of year | 5,754 | 4,718 | 4,813
Additions charged to costs and expenses | 1,779 | 3,936 | 1,230
Deductions | 3,006 | 2,817 | 1,260
Acquisitions | 0 | 0 | 0
Foreign exchange impact and other | (28) | (83) | (65)
Balance at end of year | 4,499 | 5,754 | 4,718
Reserve for Inventory Valuation [Member] |  |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Balance at beginning of year | 96,519 | 94,470 | 85,608
Additions charged to costs and expenses | 13,848 | 15,985 | 17,566
Deductions | 15,735 | 14,101 | 8,804
Acquisitions | 0 | 0 | 0
Foreign exchange impact and other | (186) | 165 | 100
Balance at end of year | 94,446 | 96,519 | 94,470
Deferred Tax Valuation Allowance [Member] |  |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Balance at beginning of year | 1,746 | 4,106 | 7,352
Additions charged to costs and expenses | 2,959 | 77 | 257
Deductions | 708 | 3,235 | 3,151
Acquisitions | 0 | 977 | 0
Foreign exchange impact and other | 9 | (179) | (352)
Balance at end of year | $ 4,006 | $ 1,746 | $ 4,106

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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 + Details
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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, charged to costs and expenses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 + Details
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- Definition Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 + Details
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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, acquired in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 + Details
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