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Share Based Compensation (Details Textual) (USD $)
In Millions, except Share data, unless otherwise specified |
3 Months Ended | |
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Mar. 31, 2013
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Mar. 31, 2012
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| Share Based Compensation (Textuals) [Abstract] | ||
| Total fair value of awards vested | $ 2.1 | $ 1.1 |
| Share Based Compensation (Additional Textuals) [Abstract] | ||
| Typical vesting rate for options granted | 3 years | |
| Cash received for exercises of stock options | 2.5 | 0.4 |
| Tax benefit realized from stock option exercises | 0.2 | 0 |
| Exercise of stock option | 445,000 | |
| Award vested as of grant date | 100.00% | |
| Granted, weighted average grant date fair value per share | $ 7.14 | $ 5.88 |
| Total unrecognized compensation cost related to nonvested awards | $ 51.1 | |
| Weighted-average expense recognition period | 2 years 4 months | |
| Common stock available for future grants | 34,600,000 | |
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After May 2004 [Member]
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| Share Based Compensation (Textuals) [Abstract] | ||
| Options granted, term | P7Y | |
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Prior to May 2004 [Member]
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| Share Based Compensation (Textuals) [Abstract] | ||
| Options granted, term | P10Y | |
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- Definition
Award Vested As Of Grant Date. No definition available.
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- Details
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- Definition
Share Based Compensation Arrangement By ShareBased Payment Award Term. No definition available.
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- Details
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- Definition
Aggregate proceeds received by the entity during the annual period from exercises of stock or unit options and conversion of similar instruments granted under equity-based payment arrangements. 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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- 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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- Definition
Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, 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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- Definition
The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The total fair value of equity-based awards for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. 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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