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Stock Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2011
Stock Based Compensation [Abstract] |
Schedule Of Stock-Based Compensation Expense |
|  | Quarter Ended September 30, |  |  | Period Ended September 30, |
|  | 2011 |  |  | 2010 |  |  | 2011 |  |  | 2010 |
Stock Based Compensation Expense |  | $ | 1.4 |  |  | $ | 1.3 |  |  | $ | 4.1 |  |  | $ | 4.3 |
Schedules Of Fair Market Value Of Restricted Shares |
|  | Grant Date Fair Value |
|  | Restricted |  |  | Unrestricted |
Relative TSR |  | $ | 1,066 |  |  | $ | 1,066 |
Absolute TSR |  | $ | 365 |  |  | $ | 365 |
Unamortized Value Of Awards With Market Conditions |
|  | Unamortized Value at September 30, 2011 |
|  | Restricted |  |  | Unrestricted |
Relative TSR |  | $ | 894 |  |  | $ | 834 |
Absolute TSR |  | $ | 306 |  |  | $ | 286 |

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (h)(1) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the weighted-average grant-date fair value of equity options or other equity instruments granted during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 718 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph (d)(1) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Schedule Of Unamortized Value Of Awards With Market Conditions [Table Text Block] + Details
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