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Share-Based Compensation - Weighted-Average Assumptions Used for Grants of Stock Options and SARs (Detail) (USD $)
3 Months Ended
Mar. 29, 2014
Mar. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected dividend yield 0.00% 0.00%
Forfeiture rate 10.31% 10.21%
Risk free interest rate, minimum 0.02% 0.07%
Risk free interest rate, maximum 1.78% 1.95%
Expected weighted-average life 5 years 5 months 1 day 5 years 5 months 23 days
Fair value of stock appreciation rights (SARs) granted $ 85,149 $ 82,910
Weighted-average grant date fair value of SARs granted $ 65.75 $ 15.08
Stock Option and Stock Appreciation Rights (SARs) [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Volatility 32.00% 35.90%
Risk free interest rate 0.82% 0.94%