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Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2013
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income tax expense totaled $31,061 and $18,354 for the first quarters of 2013 and 2012, representing effective tax rates of 35.8 percent and 34.1 percent during the respective periods. The increase in the effective tax rate for the first quarter of 2013 results from the diluted impact of various favorable permanent differences on higher pre-tax earnings.

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