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Statement of Cash Flows (Details) (USD $)
In Thousands
6 Months Ended
Jul. 02, 2011
Jul. 03, 2010
Supplemental cash flow information    
Cash Paid During the Period for interest $ 6,708 $ 3,594
Cash paid during the period for Income taxes, including foreign withholding tax 9,209 7,052
Non-cash Investing and Financing Activities:    
Stock options assumed for acquisition 1,600 0
Non-cash Available-for-sale securities received from customer $ 160 $ 0