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Stock Based Compensation - Additional Information (Detail) (USD $)
Share data in Millions, except Per Share data, unless otherwise specified
1 Months Ended 9 Months Ended 1 Months Ended 9 Months Ended 1 Months Ended
Jan. 31, 2014
Sep. 28, 2014
Sep. 29, 2013
Sep. 28, 2014
Service-Based Restricted Stock Units
Sep. 29, 2013
Service-Based Restricted Stock Units
Sep. 28, 2014
Restricted Stock Units
Employees
Sep. 28, 2014
Stock Options
Jan. 24, 2014
Stock Options
Jan. 31, 2014
TSR Performance-Based Restricted Stock Units
Sep. 28, 2014
TSR Performance-Based Restricted Stock Units
Jan. 24, 2014
TSR Performance-Based Restricted Stock Units
Jan. 31, 2014
TSR Performance-Based Restricted Stock Units
Maximum
Jan. 31, 2014
TSR Performance-Based Restricted Stock Units
Minimum
Share-based Compensation Arrangement by Share-based Payment Award                          
Restricted stock unit awards to employees       1.7 1.9       0.1 0.1      
Total shareholder return performance measurement period                 3 years        
Percentage of vesting of target shares upon performance achieved                       200.00% 0.00%
Weighted average grant date fair value of restricted stock units granted       $ 19.09 $ 16.60         $ 22.06      
Estimated annual dividend amount per share             $ 0.24     $ 0.24      
Stock price               $ 19.16     $ 19.16    
Number of service-based stock options granted to executive officers   0.1 0.2                    
Weighted average grant date fair value of stock options granted to executive officers   $ 5.49 $ 6.09                    
Period of stock granted to employees and executive officers vest in equal installments           4 years 4 years            
Stock options term   7 years                      
Stock based compensation expense related to retirement agreement $ 6,600,000