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Accumulated Other Comprehensive Income (Schedule of Accumulated Other Comprehensive Income) (Details) (Accumulated Net Unrealized Investment Gain (Loss) [Member], USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 28, 2013
Dec. 29, 2012
Accumulated Net Unrealized Investment Gain (Loss) [Member]
   
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Accumulated other comprehensive income balance, beginning $ 5,019 $ 5,448
Other comprehensive loss before reclassifications (36) (9)
Amounts reclassified from accumulated other comprehensive income (1,044) (420)
Net current period other comprehensive loss (1,080) (429)
Accumulated other comprehensive income balance, ending $ 3,939 $ 5,019