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Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2012
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Our effective tax rate was 27.2% and 27.1% for the three and nine months ended September 30, 2012, respectively, and was 26.3% and 22.5% for the three and nine months ended September 30, 2011, respectively. The changes from the prior year were primarily due to the recognition and measurement of previously unrecognized tax benefits, which was considered a discrete item for tax provision purposes for the nine months ended September 30, 2011. The recognition and measurement of these tax benefits was the result of a favorable settlement of an income tax examination.

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