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Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2012
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Our effective tax rate was 28.9% for the three months ended March 31, 2012 and was 41.9% for the three months ended March 31, 2011. The change was primarily due to the recognition and measurement of previously unrecognized tax benefits, which is considered a discrete item for tax provision purposes for the three months ended March 31, 2011. The recognition and measurement of these tax benefits was the result of a favorable settlement of an income tax examination conducted by the Internal Revenue Service.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

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+ Details