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Income Taxes - Effective Tax Rate Reconciliation (Details)	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Statutory U.S. federal income tax rate	21.00%	21.00%
State and local income taxes, net of federal benefit	4.30%	4.10%
Internal revenue code section 162 limitations	1.40%	0.40%
Other	2.10%	0.00%
Unconsolidated effective income tax rate	28.80%	25.50%
Impact attributable to redeemable noncontrolling interests(a)	4.50%	(2.10%)
Effective income tax rate	33.30%	23.40%

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Effective Income Tax Rate Reconciliation, Not Including Non-Controlling Interest, Percent

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to noncontrolling interest income (loss) exempt from income taxes.

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