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Share-Based Compensation and Employee Benefit Plans (Details 4) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Performance share units
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| Share-Based Compensation | |||
| Estimated pre-vesting forfeitures (as a percent) | 0.00% | ||
| Unrecognized compensation cost | 2.3 | ||
| Expected weighted average period during which unrecognized compensation cost will be recognized | 2 years | ||
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Restricted shares
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| Share-Based Compensation | |||
| Unrecognized compensation cost | 6.8 | ||
| Expected weighted average period during which unrecognized compensation cost will be recognized | 2 years | ||
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Restricted shares | Minimum
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|||
| Share-Based Compensation | |||
| Estimated pre-vesting forfeitures (as a percent) | 0.00% | 0.00% | 0.00% |
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Restricted shares | Maximum
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| Share-Based Compensation | |||
| Estimated pre-vesting forfeitures (as a percent) | 5.00% | 4.00% | 4.00% |
| X | ||||||||||
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- Definition
Represents the estimated pre-vesting percentage of forfeitures considered for reduction in stock compensation expense recognized during the period. No definition available.
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| X | ||||||||||
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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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| X | ||||||||||
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- Definition
Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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