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Share-Based And Cash-Based Incentive Compensation (Schedule Of Restricted Stock Awards Outstanding) (Details)
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12 Months Ended | |||||||||
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Dec. 31, 2011
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||
| Restricted stock awards outstanding | 51,870 | |||||||||
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Shares Granted In Year 2011 [Member] | Employees [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||
| Restricted stock awards outstanding | 2,662 | [1] | ||||||||
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Shares Granted In Year 2011 [Member] | Non-Employee Directors [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||
| Restricted stock awards outstanding | 15,108 | [2] | ||||||||
| Expected future vesting date of shares outstanding | Equal installments in May 2012, 2013 and 2014 | |||||||||
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Shares Granted In Year 2010 [Member] | Non-Employee Directors [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||
| Restricted stock awards outstanding | 23,330 | [3] | ||||||||
| Expected future vesting date of shares outstanding | Equal installments in May 2012 and 2013 | |||||||||
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Shares Granted In Year 2009 [Member] | Non-Employee Directors [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||
| Restricted stock awards outstanding | 10,770 | [4] | ||||||||
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