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Stock-Based Compensation Expense Stock-Based Compensation Expense- Summary of Restricted Stock Option Activity (Detail) (Details) (Restricted Stock [Member], USD $)
In Thousands, except Per Share data, unless otherwise specified
9 Months Ended
Sep. 28, 2014
Dec. 31, 2013
Restricted Stock [Member]
   
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Options, Shares Nonvested 20 0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 20  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 34.05  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period 0  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value $ 0.00  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period 0  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value $ 0  
Options, Non-Vested, Weighted-Average Exercise Price, in dollars per share $ 34.05 $ 0
Nonvested as of September 28, 2014, Aggregate Intrinsic Value $ 149