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Stock Option Plans - Additional Information (Detail) (USD $)
0 Months Ended 1 Months Ended 3 Months Ended
Oct. 10, 2005
Sep. 07, 2012
Mar. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Effective date for stock options plan Oct. 10, 2005    
Increase in number of shares reserved and available for issuance in different forms     4.50%
Vesting period for options   4 years  
Common stock granted     60,000
Restricted stock units granted     30,000
Stock option exercise price   $ 22.86  
Stock Options
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Minimum expiration period for options     7 years
Maximum expiration period for options     10 years
Minimum period for expiration of options in case of employee termination     60 days
Maximum period for expiration of options in case of employee termination     90 days
Stock Options | Minimum
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period for options     0 years
Stock Options | Maximum
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period for options     5 years
Common stock | Certain Employees
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common stock granted     181,300
Restricted stock units | Certain Employees
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted stock units granted     331,725
2005 Plan
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares reserved for issuance in different forms 1,583,682    
Share based compensation arrangement shares available for grant     3,855,966