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Valuation And Qualifying Accounts (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
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