Stock-Based Compensation (Summary Of Stock Options Outstanding By Exercise Price Range) (Details) (USD $) | 9 Months Ended |
Sep. 30, 2013 |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | ' |
Options Outstanding | 600,140 |
Options Outstanding, Weighted Average Exercise Price | $18.79 |
Options Exercisable | 600,140 |
Options Exercisable, Weighted Average Exercise Price Per Share | $18.79 |
Range Of Exercise Price, $6.60 - $6.60 [Member] | ' |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | ' |
Options Outstanding Exercise Price, Lower range limit | $6.60 |
Options Outstanding Exercise Price, Upper range limit | $6.60 |
Options Outstanding | 451,923 |
Options Outstanding, Weighted Average Exercise Price | $6.60 |
Options Outstanding, Weighted Average Remaining Contractual Life | '4 years 10 months 10 days |
Options Exercisable | 451,923 |
Options Exercisable, Weighted Average Exercise Price Per Share | $6.60 |
Range Of Exercise Price, $14.10 - $14.10 [Member] | ' |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | ' |
Options Outstanding Exercise Price, Lower range limit | $14.10 |
Options Outstanding Exercise Price, Upper range limit | $14.10 |
Options Outstanding | 5,000 |
Options Outstanding, Weighted Average Exercise Price | $14.10 |
Options Outstanding, Weighted Average Remaining Contractual Life | '7 years 9 months 29 days |
Options Exercisable | 5,000 |
Options Exercisable, Weighted Average Exercise Price Per Share | $14.10 |
Range Of Exercise Price, $28.90 - $28.90 [Member] | ' |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | ' |
Options Outstanding Exercise Price, Lower range limit | $28.90 |
Options Outstanding Exercise Price, Upper range limit | $28.90 |
Options Outstanding | 50,625 |
Options Outstanding, Weighted Average Exercise Price | $28.90 |
Options Outstanding, Weighted Average Remaining Contractual Life | '3 years 2 months 9 days |
Options Exercisable | 50,625 |
Options Exercisable, Weighted Average Exercise Price Per Share | $28.90 |
Range Of Exercise Price, $31.90 - $68.80 [Member] | ' |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | ' |
Options Outstanding Exercise Price, Lower range limit | $31.90 |
Options Outstanding Exercise Price, Upper range limit | $68.80 |
Options Outstanding | 67,523 |
Options Outstanding, Weighted Average Exercise Price | $64.69 |
Options Outstanding, Weighted Average Remaining Contractual Life | '1 year 29 days |
Options Exercisable | 67,523 |
Options Exercisable, Weighted Average Exercise Price Per Share | $64.69 |
Range Of Exercise Price, $80.30 - $96.70 [Member] | ' |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | ' |
Options Outstanding Exercise Price, Lower range limit | $80.30 |
Options Outstanding Exercise Price, Upper range limit | $96.70 |
Options Outstanding | 22,569 |
Options Outstanding, Weighted Average Exercise Price | $94.29 |
Options Outstanding, Weighted Average Remaining Contractual Life | '2 years 1 month 17 days |
Options Exercisable | 22,569 |
Options Exercisable, Weighted Average Exercise Price Per Share | $94.29 |
Range Of Exercise Price, $105.10 - $105.10 [Member] | ' |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | ' |
Options Outstanding Exercise Price, Lower range limit | $105.10 |
Options Outstanding Exercise Price, Upper range limit | $105.10 |
Options Outstanding | 2,500 |
Options Outstanding, Weighted Average Exercise Price | $105.10 |
Options Outstanding, Weighted Average Remaining Contractual Life | '1 year 10 months 2 days |
Options Exercisable | 2,500 |
Options Exercisable, Weighted Average Exercise Price Per Share | $105.10 |