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Business Combinations (Allocation of Purchase Price) (Details) (USD $) In Thousands, unless otherwise specified | Mar. 28, 2014 | Sep. 27, 2013 | Dec. 13, 2013 Sinclair Knight Merz [Member]
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Assets: |  |  |
Cash and cash equivalents |  |  | $ 152,051
Receivables and other current assets |  |  | 330,049
Property and equipment, and other |  |  | 89,524
Intangible assets |  |  | 246,696
Total assets |  |  | 818,320
Liabilities: |  |  |
Current liabilities |  |  | 296,685
Deferred tax liability |  |  | 86,344
Long-term liabilities |  |  | 18,416
Total liabilities |  |  | 401,445
Net assets acquired |  |  | 416,875
Goodwill | 2,910,998 | 2,022,831 | 802,799
Net assets acquired |  |  | $ 1,219,674

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