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 Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Sep. 27, 2014
Sep. 28, 2013
Shareholders Equity [Line Items]        
Beginning of Period     $ 171,509  
Foreign Currency Translation Adjustment (2,375) 129 (2,943) (260)
Stock Compensation Expense     (1,304) (1,048)
Change in Accumulated (Loss) Income on Derivatives - Net of Tax 27 27 19 65
Net Income 17,080 7,155 37,731 20,877
Retirement Liability Adjustment - net of tax 110 105 318 316
End of Period 211,269   211,269  
Convertible Class B Stock [Member]
        
Shareholders Equity [Line Items]        
Shares Authorized 10,000,000   10,000,000  
Share Par Value $ 0.01   $ 0.01  
Beginning of Period     8,221,000  
Conversion of Class B Shares to Common Shares     (1,261,000)  
Exercise of Stock Options     133,000  
End of Period 7,093,000   7,093,000  
Common Stock [Member]
        
Shareholders Equity [Line Items]        
Beginning of Period     214  
Conversion of Class B Shares to Common Shares         
Exercise of Stock Options     4  
End of Period 218   218  
Shares Authorized 40,000,000   40,000,000  
Share Par Value $ 0.01   $ 0.01  
Beginning of Period     13,268,000  
Conversion of Class B Shares to Common Shares     1,261,000  
Exercise of Stock Options     166,000  
End of Period 14,695,000   14,695,000  
Additional Paid in Capital [Member]
        
Shareholders Equity [Line Items]        
Beginning of Period     40,791  
Stock Compensation Expense     1,304  
Exercise of Stock Options     3,365  
End of Period 45,460   45,460  
Accumulated Comprehensive Loss [Member]
        
Shareholders Equity [Line Items]        
Beginning of Period     (3,611)  
Foreign Currency Translation Adjustment     (2,943)  
Change in Accumulated (Loss) Income on Derivatives - Net of Tax     19  
Retirement Liability Adjustment - net of tax     318  
End of Period (6,217)   (6,217)  
Retained Earnings [Member]
        
Shareholders Equity [Line Items]        
Beginning of Period     134,115  
Cash Paid in Lieu of Fractional Shares from Stock Distribution     (38)  
Net Income     37,731  
End of Period $ 171,808   $ 171,808