Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity - Summary of Changes in Shareholders' Equity (Details)

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Shareholders' Equity - Summary of Changes in Shareholders' Equity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Feb. 24, 2016
Apr. 02, 2016
Apr. 04, 2015
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning of period   $ 300,225  
Foreign Currency Translation Adjustments   1,816 $ (3,646)
Retirement liability adjustment – net of tax   131 161
Net income   11,485 $ 10,683
End of period   310,973  
Common Stock      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning of period   256  
Conversion of Class B Shares to Common Shares   0  
Exercise of stock options   1  
End of period   $ 257  
Common Stock | Common Class Undefined      
Class of Stock [Line Items]      
Shares authorized   40,000,000  
Share par value   $ 0.01  
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning of period (shares)   19,349,000  
Conversion of Class B Shares to Common Shares (shares)   174,000  
Exercise of stock options (shares)   34,000  
End of period (shares)   19,557,000  
Common Stock | Convertible Class B Stock      
Class of Stock [Line Items]      
Shares authorized   10,000,000  
Share par value   $ 0.01  
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning of period (shares)   6,220,000  
Conversion of Class B Shares to Common Shares (shares)   (174,000)  
Exercise of stock options (shares)   46,000  
End of period (shares)   6,092,000  
Additional Paid-in Capital      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning of period   $ 57,865  
Exercise of stock options   979  
Stock Compensation Expense   597  
End of period   59,441  
Accumulated Other Comprehensive Loss      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning of period   (15,064)  
Foreign Currency Translation Adjustments   1,816  
Retirement liability adjustment – net of tax   131  
End of period   (13,117)  
Retained Earnings      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning of period   257,168  
Net income   11,485  
End of period   268,653  
Treasury Stock      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning of period   $ 0  
Beginning of period (shares)   0  
Purchase $ (4,300) $ (4,261)  
Purchase (shares) 129,000 129,000  
End of period   $ (4,261)  
End of period (shares)   129,000