Income Taxes	6 Months Ended
	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income TaxesThe Company’s effective income tax rate was 20.4% and 20.9% for the three and six months ended June 30, 2021, respectively. The effective income tax rate for both periods was lower than the 21% federal statutory rate primarily due to earnings attributable to noncontrolling interests for which income taxes are not the responsibility of the Company, with the decrease mostly offset by state income taxes (net of the federal tax benefit).The Company’s effective tax rate for the three and six months ended June 30, 2020 was 23.7% and 20.5%, respectively. The effective income tax rate for the three months ended June 30, 2020 was higher than the 21% federal statutory rate primarily due to state income taxes (net of the federal tax benefit), partially offset by earnings attributable to noncontrolling interests. The effective income tax rate for the six months ended June 30, 2020 was lower than the 21% federal statutory rate primarily due to the favorable tax rate differential realized on the 2019 net operating loss carryback under the Coronavirus Aid, Relief, and Economic Security Act and earnings attributable to noncontrolling interests. These favorable tax rate items for the first half of 2020 were partially offset by state income taxes (net of the federal tax benefit) and share-based compensation expense that was not deductible for income tax purposes.