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Fair Value Measurement (Details 2) (Level 2, USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 25, 2012
Carrying Amount
   
Carrying amount and Fair value of financial instruments    
Installment loans $ 1,233 $ 1,473
Fair Value
   
Carrying amount and Fair value of financial instruments    
Installment loans $ 1,434 $ 1,752