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Income Taxes	9 Months Ended
Sep. 30, 2013
Income Taxes [Abstract]
Income Taxes	NOTE 8. Income Taxes Our effective tax rate for the three and nine months ended September 30, 2013 was 31.4% and 31.1%, respectively. Our effective tax rate for the three and nine months ended September 30, 2012 was 31.8% and 31.6%, respectively. The decrease in tax rate was due to the amount of tax-advantaged income relative to total income for the three and nine months ended September 30, 2013, as compared to the tax-advantaged income relative to total income for the three and nine months ended September 30, 2012 as well as a reduction in state income tax expense. The estimated annual effective rates for the reporting periods ended September 30, 2013 and September 30, 2012 were impacted by the level of permanent differences, including tax-advantaged income, resulting in an effective rate below statutory rates for the interim reporting periods.

Income Taxes

9 Months Ended

Sep. 30, 2013

NOTE 8. Income Taxes

Our effective tax rate for the three and nine months ended September 30, 2013 was 31.4% and 31.1%, respectively. Our effective tax rate for the three and nine months ended September 30, 2012 was 31.8% and 31.6%, respectively. The decrease in tax rate was due to the amount of tax-advantaged income relative to total income for the three and nine months ended September 30, 2013, as compared to the tax-advantaged income relative to total income for the three and nine months ended September 30, 2012 as well as a reduction in state income tax expense. The estimated annual effective rates for the reporting periods ended September 30, 2013 and September 30, 2012 were impacted by the level of permanent differences, including tax-advantaged income, resulting in an effective rate below statutory rates for the interim reporting periods.

- Definition

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.

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