Quarterly report pursuant to Section 13 or 15(d)

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

v3.7.0.1
Shareholders' Equity - Summary of Changes in Shareholders' Equity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Feb. 24, 2016
Apr. 01, 2017
Apr. 02, 2016
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning of Period   $ 337,449  
Foreign Currency Translation Adjustment   395 $ 1,816
Retirement Liability Adjustment – Net of Tax   131 131
Net Income   11,587 $ 11,485
End of Period   $ 346,100  
Common Stock      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
End of Period (in shares)   21,620,000  
Convertible Class B Stock      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
End of Period (in shares)   7,378,000  
COMMON STOCK      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning of Period   $ 297  
Conversion of Class B Shares to Common Shares   0  
Exercise of Stock Options   0  
End of Period   $ 297  
COMMON STOCK | Common Stock      
Class of Stock [Line Items]      
Shares Authorized (in shares)   40,000,000  
Share Par Value (in usd per share)   $ 0.01  
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning of Period (in shares)   21,955,000  
Conversion of Class B Shares to Common Shares (in shares)   320,000  
Exercise of Stock Options (in shares)   16,000  
End of Period (in shares)   22,291,000  
COMMON STOCK | Convertible Class B Stock      
Class of Stock [Line Items]      
Shares Authorized (in shares)   15,000,000  
Share Par Value (in usd per share)   $ 0.01  
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning of Period (in shares)   7,665,000  
Conversion of Class B Shares to Common Shares (in shares)   (320,000)  
Exercise of Stock Options (in shares)   33,000  
End of Period (in shares)   7,378,000  
ADDITIONAL PAID IN CAPITAL      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning of Period   $ 64,752  
Exercise of Stock Options   295  
Stock Compensation Expense   656  
End of Period   65,703  
ACCUMULATED OTHER COMPREHENSIVE LOSS      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning of Period   (15,494)  
Foreign Currency Translation Adjustment   395  
Retirement Liability Adjustment – Net of Tax   131  
End of Period   (14,968)  
RETAINED EARNINGS      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning of Period   305,512  
Net Income   11,587  
End of Period   317,099  
TREASURY STOCK      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning of Period   $ (17,618)  
Beginning of Period (in shares)   523,000  
Purchase $ (22,000) $ (4,413)  
Purchase (in shares) (671,000) (148,000)  
End of Period   $ (22,031)  
End of Period (in shares)   671,000