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Stock Appreciation Rights Activity (Detail) (Stock Appreciation Rights, USD $)
In Thousands, except Per Share data, unless otherwise specified
6 Months Ended
Jul. 12, 2014
Dec. 28, 2013
Stock Appreciation Rights
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Shares, Balance at beginning of period 141  
Deferred stock vested (22)  
Number of shares, Balance at end of period 119  
Weighted Average Fair Value outstanding, at beginning of period $ 7.26  
Weighted Average Fair Value, Rights exercised $ 6.25  
Weighted Average Fair Value outstanding, at end of period $ 7.44  
Outstanding unvested at beginning of period, Aggregate Liability $ 1,591 $ 1,982