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Stock Option And Stock Award Plans (Summary Of Additional Information On Non-Vested Restricted Stock Outstanding) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]      
Grant Date Fair Value, Vested $ (1,700) $ (2,100) $ (1,900)
Restricted Stock
      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Number of Shares, Outstanding, Beginning Balance 143,900 126,150 93,850
Number of Shares, Granted 93,425 94,949 51,360
Number of Shares, Vested (58,175) (60,357) (18,060)
Number of Shares, Forfeited (21,300) (16,842) (1,000)
Number of Shares, Outstanding, Ending Balance 157,850 143,900 126,150
Wgtd. Ave. Grant Date Fair Value/Sh., Beginning Balance $ 18.82 $ 18.25 $ 17.40
Wgtd. Ave. Grant Date Fair Value/Sh., Granted $ 25.45 $ 19.06 $ 19.42
Wgtd. Ave. Grant Date Fair Value/Sh., Vested $ 20.15 $ 18.01 $ 17.20
Wgtd. Ave. Grant Date Fair Value/Sh., Forfeited $ 20.70 $ 18.82 $ 17.13
Wgtd. Ave. Grant Date Fair Value/Sh., Ending Balance $ 22.00 $ 18.82 $ 18.25
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]      
Grant Date Fair Value, Outstanding, Beginning Balance 2,708 2,302 1,633
Grant Date Fair Value, Granted 2,378 1,810 997
Grant Date Fair Value, Vested (1,172) (1,087) (311)
Grant Date Fair Value, Forfeited (441) (317) (17)
Grant Date Fair Value, Outstanding, Ending Balance 3,473 2,708 2,302
Maximum Non-Vested Restricted Stock Units Issuable Upon Satisfaction Of Certain Performance Criteria
      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Number of Shares, Outstanding, Beginning Balance 91,800 85,000 150,925
Number of Shares, Granted 77,200 87,200 88,900
Number of Shares, Vested    0 (66,925)
Number of Shares, Forfeited (36,700) (80,400) (87,900)
Number of Shares, Outstanding, Ending Balance 132,300 91,800 85,000
Wgtd. Ave. Grant Date Fair Value/Sh., Beginning Balance $ 18.85 $ 19.35 $ 17.21
Wgtd. Ave. Grant Date Fair Value/Sh., Granted $ 27.82 $ 18.79 $ 19.32
Wgtd. Ave. Grant Date Fair Value/Sh., Vested $ 0.00 $ 0.00 $ 17.68
Wgtd. Ave. Grant Date Fair Value/Sh., Forfeited $ 19.83 $ 19.31 $ 16.93
Wgtd. Ave. Grant Date Fair Value/Sh., Ending Balance $ 23.81 $ 18.85 $ 19.35
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]      
Grant Date Fair Value, Outstanding, Beginning Balance 1,730 1,645 2,598
Grant Date Fair Value, Granted 2,148 1,638 1,718
Grant Date Fair Value, Vested 0 0 (1,183)
Grant Date Fair Value, Forfeited (728) (1,553) (1,488)
Grant Date Fair Value, Outstanding, Ending Balance $ 3,150 $ 1,730 $ 1,645