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Income Taxes - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | |
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Mar. 31, 2012
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Mar. 31, 2011
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| Income Taxes [Line Items] | ||
| Gross unrecognized tax benefit balance, change within the next twelve months, lower limit | $ 0 | |
| Gross unrecognized tax benefit balance, change within the next twelve months, upper limit | $ 7.2 | |
| Effective income tax rate | 36.80% | 37.90% |
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- Details
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- Definition
A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The estimated lower bound of the reasonably possible change in the total amount of the unrecognized tax benefit (that will significantly increase or decrease within twelve months of the balance sheet date) for a tax position taken. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The estimated upper bound of the reasonably possible change in the total amount of the unrecognized tax benefit (that will significantly increase or decrease within twelve months of the balance sheet date) for a tax position taken. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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