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Incentive Program (Summary Of Stock Options Outstanding) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
12 Months Ended |
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Dec. 31, 2011
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| Incentive Program [Line Items] | |
| Outstanding at December 31, Weighted Average Remaining Contractual Term, in Years | 3.0 |
| Exercisable at December 31, Weighted Average Remaining Contractual Term, in Years | 3.0 |
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Stock Option [Member]
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| Incentive Program [Line Items] | |
| Outstanding at January 1, Shares | 29,509 |
| Outstanding at January 1, Avg. Exercise Price | $ 44.65 |
| Exercised, shares | (23,880) |
| Exercised, Avg. Exercise Price | $ 38.81 |
| Forfeited, Shares | (80) |
| Forfeited, Avg. Exercise Price | $ 48.01 |
| Outstanding at December 31, Shares | 5,549 |
| Outstanding at December 31, Avg. Exercise Price | $ 69.76 |
| Exercisable at December 31, Shares | 5,323 |
| Exercisable at December 31, Avg. Exercise Price | $ 68.65 |
| X | ||||||||||
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- Definition
The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The weighted average price at which option holders acquired shares when converting their stock options into shares under the plan during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated during the reporting period due to noncompliance with plan terms during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The weighted average period between the balance sheet date and expiration for all awards outstanding under the plan, which may be expressed in a decimal value for number of years. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The weighted average remaining life of the exercisable stock options as of the balance sheet date for all option plans in the customized range of exercise prices. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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