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Stock Appreciation Rights Activity (Detail) (Stock Appreciation Rights, USD $)
In Thousands, except Per Share data, unless otherwise specified
9 Months Ended
Oct. 05, 2013
Stock Appreciation Rights
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding unvested at beginning of period 195
Number of Rights, Rights exercised (54)
Outstanding unvested at end of period 141
Weighted Average Fair Value outstanding, at beginning of period $ 7.01
Weighted Average Fair Value, Rights Exercised $ 6.52
Weighted Average Fair Value outstanding, at end of period $ 7.26
Weighted Average Remaining Contractual Term (Years), Outstanding at end of period 1 year 9 months 11 days
Aggregate Intrinsic Value, Balance at end of period $ 2,019