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Income Taxes	3 Months Ended
	Mar. 31, 2022
Income Taxes
Income Taxes	Note 8.  Income Taxes ​ Our effective income tax rates for the first quarters of 2022 and 2021 were 24.8% and 25.3%, respectively. The differences between our effective income tax rates and the U.S. federal statutory rate of 21.0% were mainly due to state income taxes, partially offset by the effects of company-owned life insurance policies. ​

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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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