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Income Taxes
 9 Months Ended
Sep. 30, 2021
Income Tax Disclosure [Abstract]  
Taxes INCOME TAXES
For interim periods, accounting standards require that income tax expense be determined by applying the estimated annual effective income tax rate to year-to-date results, unless this method does not result in a reliable estimate of year-to-date income tax expense. Each period, the income tax accrual is adjusted to the latest estimate and the difference from the previously accrued year-to-date balance is adjusted to the current quarter.

For the nine months ended September 30, 2021, our income tax expense reflects an income tax benefit of $13.8 million as compared to an income tax provision of $14.1 million in the comparable period of 2020. Our effective tax rate for the first nine months of 2021 of 26.8% varied from the U.S. statutory tax rate of 21% primarily due to the effects of state taxes and nondeductible compensation. Our effective tax rate for the first nine months of 2020 approximated the statutory U.S. federal income tax rate of 21% and included a $7.0 million benefit from the provisions of the Coronavirus Aid, Relief, and Economic Security Act.