Quarterly report pursuant to Section 13 or 15(d)

Common Stock And Earnings Per Share (Details)

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Common Stock And Earnings Per Share (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 29, 2012
Oct. 01, 2011
Sep. 29, 2012
Oct. 01, 2011
Dec. 31, 2011
Jan. 01, 2011
Common Stock And Earnings Per Share [Abstract]            
Net earnings available to common shareholders $ 17,490 $ 12,385 $ 47,986 $ 37,591    
Common shares outstanding entire period 14,496   14,496   14,940 15,985
Weighted average common shares issued during period 229 39 107 19    
Weighted average common shares repurchased and retired during period (804) (981) (374) (509)    
Weighted average common shares outstanding during period 14,365 15,043 14,673 15,495    
Earnings per common share from net earnings - basic $ 1.22 $ 0.82 $ 3.27 $ 2.43    
Weighted average common shares outstanding during period - basic 14,365 15,043 14,673 15,495    
Dilutive effect of in-the-money equity awards 519 162 391 217    
Weighted average common shares outstanding during period - diluted 14,884 15,205 15,064 15,712    
Earnings per common share from net earnings - diluted $ 1.18 $ 0.81 $ 3.19 $ 2.39    
Equity awards of stock excluded in computation of diluted EPS 522 2,880 1,357 2,895