Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income taxes	12. Income Taxes For the three and nine months ended September 30, 2020, the effective tax rate was 24.0% and 23.9%, respectively, which differed from the statutory federal rate of 21% primarily due to state income taxes, as well as unfavorable permanent differences including executive compensation disallowed under Internal Revenue Code Section 162(m). The effective tax rate increased during the three and nine months ended September 30, 2020 compared to the same periods in 2019, primarily due to the relative unfavorable tax impacts of the permanent differences on the annual effective rate. For the three and nine months ended September 30, 2019, the effective tax rate was 22.3% and 21.5%, respectively, which differed from the statutory federal rate of 21% primarily due to permanent differences including executive compensation disallowed under Internal Revenue Code Section 162(m) and nondeductible meals and entertainment expenses, as well as other recurring items such as the state tax benefit.

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.