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Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2012
Income Taxes	(5) Income Taxes Our effective tax rate for the first quarter of 2012 was 34.7 percent, compared with 34.2 percent for the first quarter of 2011. The increase in the effective tax rate for the 2012 period is primarily a result of the absence of tax incentives for research and development expenditures in the 2012 period and an increase in state income taxes.

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