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Stock-based Compensation Expense - Additional Information (Detail) (USD $)
In Millions, except Share data in Thousands, unless otherwise specified
3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Jun. 28, 2013
Jun. 29, 2012
Jun. 28, 2013
Jun. 29, 2012
Mar. 29, 2013
Stock Appreciation Rights [Member]
Jun. 28, 2013
Stock Appreciation Rights [Member]
Jun. 29, 2012
Stock Appreciation Rights [Member]
Mar. 29, 2013
Restricted Stock [Member]
Mar. 29, 2013
Performance Restricted Stock [Member]
Jun. 28, 2013
Stock Options [Member]
Jun. 29, 2012
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Stock-based compensation expense $ 1.5 $ 1.4 $ 2.7 $ 2.8              
Stock appreciation rights to employees         147     42 42    
Stock appreciation right strike price         $ 28.32            
Fair value of the SARs and restricted stock         $ 12.54     $ 28.32 $ 23.90    
Stock appreciation rights vested period         3 years     3 years 3 years    
Expiration period of option rights granted to non employees         7 years            
Total cash received from the exercise of stock options                   $ 0.8 $ 0.1
Number of stock options                   56 13
Number of SARs exercised           57 27