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 6 Months Ended
Feb. 24, 2016
Jul. 01, 2017
Jul. 02, 2016
Jul. 01, 2017
Jul. 02, 2016
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Beginning of Period       $ 337,449  
Foreign Currency Translation Adjustment   $ 2,096 $ (511) 2,491 $ 1,305
Retirement Liability Adjustment – Net of Tax   131 130 262 261
Net Income   7,685 $ 14,980 19,272 $ 26,465
End of Period   $ 347,723   $ 347,723  
Common Stock          
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
End of Period (in shares)   21,685,000   21,685,000  
Convertible Class B Stock          
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
End of Period (in shares)   7,016,000   7,016,000  
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   $ 297  
COMMON STOCK | Common Stock          
Class of Stock [Line Items]          
Shares Authorized (in shares)   40,000,000   40,000,000  
Share Par Value (in usd per share)   $ 0.01   $ 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)       686,000  
Exercise of Stock Options (in shares)       17,000  
End of Period (in shares)   22,658,000   22,658,000  
COMMON STOCK | Convertible Class B Stock          
Class of Stock [Line Items]          
Shares Authorized (in shares)   15,000,000   15,000,000  
Share Par Value (in usd per share)   $ 0.01   $ 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)       (686,000)  
Exercise of Stock Options (in shares)       37,000  
End of Period (in shares)   7,016,000   7,016,000  
ADDITIONAL PAID IN CAPITAL          
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Beginning of Period       $ 64,752  
Exercise of Stock Options       317  
Stock Compensation Expense       1,456  
End of Period   $ 66,525   66,525  
ACCUMULATED OTHER COMPREHENSIVE LOSS          
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Beginning of Period       (15,494)  
Foreign Currency Translation Adjustment       2,491  
Retirement Liability Adjustment – Net of Tax       262  
End of Period   (12,741)   (12,741)  
RETAINED EARNINGS          
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Beginning of Period       305,512  
Net Income       19,272  
End of Period   324,784   324,784  
TREASURY STOCK          
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Beginning of Period       $ (17,618)  
Beginning of Period (in shares)       523,000  
Purchase $ (31,100)     $ (13,524)  
Purchase (in shares) (973,000)     (450,000)  
End of Period   $ (31,142)   $ (31,142)  
End of Period (in shares)   973,000   973,000