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Income Taxes - Additional Information (Detail) (USD $)
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3 Months Ended | |
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Mar. 31, 2013
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Mar. 31, 2012
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| Income Tax Disclosure [Abstract] | ||
| Income taxes | $ 44,675,000 | $ 44,801,000 |
| Effective income tax rate | 27.30% | 29.30% |
| Total amount of unrecognized tax benefits, including related interest and penalties | 49,000,000 | |
| Unrecognized tax benefits excluding interest and penalties that if recognized would affect the effective tax rate | 39,800,000 | |
| Total accrued interest for tax contingencies | 5,900,000 | |
| Total accrued penalties for tax contingencies | 1,700,000 | |
| Amount of unrecognized tax benefits that could decrease within the next 12 months | 28,300,000 | |
| Decrease in unrecognized tax benefits due to the settlement of audits or resolution of administrative or judicial proceedings | 26,100,000 | |
| Decrease in unrecognized tax benefits expiration of statute of limitations | $ 2,200,000 | |
| X | ||||||||||
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- Definition
Estimated decrease in unrecognized tax benefits within the next twelve months due to settlement of audits or resolution of administrative or judicial proceedings. No definition available.
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- Definition
Estimated decrease in unrecognized tax benefits within the next twelve months due to expiration of statute of limitations. No definition available.
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- Definition
The gross amount of unrecognized tax benefits including interest and penalties as of the balance sheet date. No definition available.
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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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- Details
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- Definition
The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations. 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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- Definition
This element represents the amount of statutory penalties accrued as of the date of the statement of financial position for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
This element represents the amount of interest expense accrued as of the date of the statement of financial position for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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