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Accumulated Other Comprehensive Income (Loss) and Shareholders' Equity (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Apr. 02, 2016
Apr. 04, 2015
Jan. 02, 2016
Class of Stock [Line Items]      
Cash dividends per common share (in dollars per share) $ 0.265 $ 0.25  
Accumulated other comprehensive income(loss) $ (5,502)   $ (5,186)
Common Stock [Member]      
Class of Stock [Line Items]      
Repurchased common stock, shares 49,400    
Repurchased common stock, value $ 1,700    
Stock repurchase program, remaining authorized repurchase amount 191,000    
Interest Rate Swap [Member]      
Class of Stock [Line Items]      
Derivative, Notional Amount $ 150,000    
Derivative, Fixed Interest Rate 1.29%    
Derivative Liability $ 800    
Accumulated other comprehensive income(loss) $ 500