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Stock Option And Stock Award Plans (Summary Of Additional Information On Stock Options Outstanding And Exercisable) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options Outstanding, Shares 1,046,800
Options Outstanding, Weighted Average, Remaining Contractual Life (Years) 4 years 3 months 20 days
Options Outstanding, Weighted Average, Exercise Price $ 19.06
Options Outstanding, Aggregate Intrinsic Value $ 10,217
Options Exercisable, Shares 769,825
Options Exercisable, Weighted Average Exercise Price $ 17.70
Options Exercisable, Aggregate Intrinsic Value 8,553
- To 15.00
  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of Exercise Prices, Minimum $ 0
Range of Exercise Prices, Maximum $ 15
Options Outstanding, Shares 26,000
Options Outstanding, Weighted Average, Remaining Contractual Life (Years) 1 year 10 months 24 days
Options Outstanding, Weighted Average, Exercise Price $ 14.06
Options Outstanding, Aggregate Intrinsic Value 384
Options Exercisable, Shares 26,000
Options Exercisable, Weighted Average Exercise Price $ 14.06
Options Exercisable, Aggregate Intrinsic Value 384
15.01 To 17.00
  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of Exercise Prices, Minimum $ 15.01
Range of Exercise Prices, Maximum $ 17.5
Options Outstanding, Shares 346,300
Options Outstanding, Weighted Average, Remaining Contractual Life (Years) 2 years 2 months 14 days
Options Outstanding, Weighted Average, Exercise Price $ 16.56
Options Outstanding, Aggregate Intrinsic Value 4,243
Options Exercisable, Shares 346,300
Options Exercisable, Weighted Average Exercise Price $ 16.56
Options Exercisable, Aggregate Intrinsic Value 4,243
17.51 To 20.00
  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of Exercise Prices, Minimum $ 17.51
Range of Exercise Prices, Maximum $ 20
Options Outstanding, Shares 503,200
Options Outstanding, Weighted Average, Remaining Contractual Life (Years) 4 years 3 months 20 days
Options Outstanding, Weighted Average, Exercise Price $ 19.02
Options Outstanding, Aggregate Intrinsic Value 4,928
Options Exercisable, Shares 397,525
Options Exercisable, Weighted Average Exercise Price $ 18.93
Options Exercisable, Aggregate Intrinsic Value 3,926
20.01 To 25.00
  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of Exercise Prices, Minimum $ 20.01
Range of Exercise Prices, Maximum $ 25
Options Outstanding, Shares 166,800
Options Outstanding, Weighted Average, Remaining Contractual Life (Years) 9 years 1 month 5 days
Options Outstanding, Weighted Average, Exercise Price $ 24.84
Options Outstanding, Aggregate Intrinsic Value 662
Options Exercisable, Shares 0
Options Exercisable, Weighted Average Exercise Price $ 0.00
Options Exercisable, Aggregate Intrinsic Value 0
25.01 To 30.01
  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of Exercise Prices, Minimum $ 25.01
Range of Exercise Prices, Maximum $ 30.01
Options Outstanding, Shares 4,500
Options Outstanding, Weighted Average, Remaining Contractual Life (Years) 9 years 7 months 7 days
Options Outstanding, Weighted Average, Exercise Price $ 30.01
Options Outstanding, Aggregate Intrinsic Value 0
Options Exercisable, Shares 0
Options Exercisable, Weighted Average Exercise Price $ 0.00
Options Exercisable, Aggregate Intrinsic Value $ 0