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Debt (Schedule of Long-Term Debt) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 29, 2013
Dec. 28, 2012
Debt Disclosure [Abstract]    
Line of Credit Facility, Amount Outstanding $ 233,000 $ 33,000
Convertible Subordinated Debt 0 197,782
Debt Instrument, Unamortized Discount 0 5,368
Long-term debt $ 233,000 $ 225,414