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Acquisitions and Purchase Accounting Results of Operations (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 30, 2013 | Mar. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Revenue, Net | $ 327,451 | [1] | $ 228,823 | [1]
Operating Income (Loss) | $ 42,195 |  | $ 36,660 |
[1] | Non-operating expenses are not allocated to the operating segments. Non-operating expenses consist of interest expense and deferred financing amortization, foreign exchange gains and losses and other income and expense items outside of income from operations.

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