Quarterly report pursuant to Section 13 or 15(d)

Shareholder's Equity - Summary of Changes in Shareholder's Equity (Detail)

v2.4.0.8
Shareholder's Equity - Summary of Changes in Shareholder's Equity (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended
Mar. 29, 2014
Mar. 30, 2013
Shareholders Equity [Line Items]    
Beginning of Period $ 171,509  
Foreign Currency Translation Adjustment (386) (197)
Stock Compensation Expense (394) (326)
Net Income 7,507 8,564
Mark to Market Adjustment for Derivatives 20 15
End of Period 180,996  
Convertible Class B Stock [Member]
    
Shareholders Equity [Line Items]    
Shares Authorized 10,000  
Share Par Value $ 0.01  
Beginning of Period, Shares 4,590  
Conversion of Class B Shares to Common Shares, Shares (532)  
Exercise of Stock Options, Shares 78  
End of Period, Shares 4,136  
Common Stock [Member]
    
Shareholders Equity [Line Items]    
Beginning of Period 179  
Conversion of Class B Shares to Common Shares     
Exercise of Stock Options 1  
End of Period 180  
Shares Authorized 40,000  
Share Par Value $ 0.01  
Beginning of Period, Shares 13,268  
Conversion of Class B Shares to Common Shares, Shares 532  
Exercise of Stock Options, Shares 93  
End of Period, Shares 13,893  
Additional Paid in Capital [Member]
    
Shareholders Equity [Line Items]    
Beginning of Period 40,826  
Stock Compensation Expense 394  
Exercise of Stock Options 1,849  
End of Period 43,069  
Accumulated Comprehensive Loss [Member]
    
Shareholders Equity [Line Items]    
Beginning of Period (3,611)  
Foreign Currency Translation Adjustment (386)  
Mark to Market Adjustment for Derivatives 20  
Retirement Liability Adjustment 102  
End of Period (3,875)  
Retained Earnings [Member]
    
Shareholders Equity [Line Items]    
Beginning of Period 134,115  
Net Income 7,507  
End of Period $ 141,622