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Share-Based Compensation (Details Textuals) (USD $)
In Millions, except Per Share data, unless otherwise specified |
3 Months Ended | 6 Months Ended | |||
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Jun. 30, 2011
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Jun. 30, 2010
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Jun. 30, 2011
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Jun. 30, 2010
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Dec. 31, 2010
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| Share-Based Compensation (Textuals) | |||||
| Share-based compensation expense | $ 5.5 | $ 5.5 | $ 11.1 | $ 10.8 | |
| Unrecognized compensation cost on nonvested stock awards | 46.4 | 46.4 | |||
| Unrecognized compensation cost on nonvested stock awards, weighted-average period of recognition | 1.7 | ||||
| Weighted-average grant date fair value, stock awards granted | $ 21.01 | $ 10.99 | $ 21.01 | $ 10.82 | |
| Total intrinsic value of stock awards exercised | 47.1 | 7.5 | 64.0 | 13.4 | |
| Unrealized excess tax benefits | $ 11.0 | $ 11.0 | $ 8.7 | ||
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- Definition
Employee Service Share Based Compensation Nonvested Award Compensation Cost Not Yet Recognized Period For Recognition.
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- Definition
Share Based Compensation Arrangement By Share Based Payment Awards Exercises In Period Intrinsic Value.
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- Definition
Share Based Compensation Arrangement By Share Based Payment Awards Grants In Period Weighted Average Grant Date Fair Value.
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- Definition
Share-Based Compensation.
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- Definition
Unrealized excess tax benefits.
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- Definition
Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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