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Share Based Payment Arrangements - Additional Information (Detail) (USD $)
6 Months Ended 6 Months Ended 1 Months Ended 6 Months Ended 1 Months Ended 6 Months Ended
Jun. 28, 2014
CompensationPlan
EquityPlan
Jun. 29, 2013
Jun. 28, 2014
2013 Directors Stock Compensation Plan
Jun. 28, 2014
Restricted Stock Units (RSUs)
Jun. 29, 2013
Restricted Stock Units (RSUs)
Jan. 23, 2013
Restricted Stock Units (RSUs)
Chairman and Chief Executive Officer
Jun. 28, 2014
Restricted Stock Units (RSUs)
Maximum
Jan. 23, 2013
Restricted Stock Units (RSUs)
Maximum
Chairman and Chief Executive Officer
Jun. 28, 2014
Other Stock Compensation Plans
Jun. 28, 2014
Employee Stock Option
Jun. 29, 2013
Employee Stock Option
Jun. 28, 2014
Non-vested Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                        
Number of employee equity incentive plans 2                      
Number of board of director stock compensation plans 2                      
Common stock authorized for issuance     115,000                  
Income tax benefit realized on disqualifying dispositions of stock acquired by exercise of incentive stock options $ 464,000 $ 417,000                    
Common stock reserved for issuance     95,531           6,191,385      
The weighted average grant date fair value of stock options granted                   $ 12.70 $ 14.21  
Total intrinsic value of stock options exercised during periods                   6,386,000 5,305,000  
Unrecognized compensation cost                   3,837,000    
Unrecognized compensation cost expected to be recognized over period, years       3 years 3 months 18 days           2 years 7 months 6 days   2 years 4 months 24 days
Unrecognized compensation cost             20,100,000         1,063,000
Discount rate on stock awards       7.00% 7.00%              
RSU awards vesting period             5 years 3 years        
Percentage used in calculation to determine vesting       5.00%                
Awards issued       146,000   100,000           7,124
Recognized share-based compensation expense       $ 1,588,000 $ 1,044,000