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Income Taxes
9 Months Ended
Sep. 30, 2023
Income Tax Disclosure [Abstract]  
Income Taxes
6.
Income Taxes

The effective income tax rate reflects the effect of federal and state income taxes on earnings and the impact of differences in book and tax accounting arising primarily from the permanent tax benefits associated with the statutory depletion deduction for mineral reserves. The effective income tax rates for continuing operations were 20.6% and 22.1% for the nine months ended September 30, 2023 and 2022, respectively. The higher 2022 effective income tax rate versus 2023 was driven by the impact of the divestiture of the Colorado and Central Texas ready mixed concrete businesses and associated nondeductible goodwill.