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Income taxes	9 Months Ended
	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Income taxes	12. Income taxes The effective income tax rate for the three months ended September 30, 2021 was 29.8% compared with 28.0% for the prior year period, due to favorable permanent items during the three months ended September 30, 2020. The effective income tax rate for the nine months ended September 30, 2021 was 27.6% compared with 25.5% for the nine months ended September 30, 2020, due to unfavorable permanent items partially offset by windfalls associated with exercises of restricted stock during the nine months ended September 30, 2021.

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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.

+ References

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