Quarterly report pursuant to Section 13 or 15(d)

Common Stock And Earnings Per Share (Schedule Of Common Stock And Earnings Per Share) (Details)

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Common Stock And Earnings Per Share (Schedule Of Common Stock And Earnings Per Share) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 28, 2014
Jun. 29, 2013
Jun. 28, 2014
Jun. 29, 2013
Mar. 29, 2014
Dec. 28, 2013
Mar. 30, 2013
Dec. 29, 2012
Common Stock And Earnings Per Share [Abstract]                
Net earnings available to common shareholders $ 19,301 $ 24,210 $ 35,838 $ 41,989        
Common shares outstanding entire period 13,404   13,404   13,886 13,886 13,821 13,821
Weighted average common shares issued during period 131 106 81 58        
Weighted average common shares cancelled during period (249) (414) (124) (301)        
Weighted average common shares outstanding during period 13,768 13,513 13,843 13,578        
Earnings per common share from net earnings - basic $ 1.40 $ 1.79 $ 2.59 $ 3.09        
Weighted average common shares outstanding during period - basic 13,768 13,513 13,843 13,578        
Dilutive effect of in-the-money equity awards 467 586 472 456        
Weighted average common shares outstanding during period - diluted 14,235 14,099 14,315 14,034        
Earnings per common share from net earnings - diluted $ 1.36 $ 1.72 $ 2.50 $ 2.99        
Equity awards for the following shares were not included in the their effect would be anti-dilutive: 383 234 328 560