INCOME TAXES (Effective Income Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Line Items]
Income tax expense at federal statutory rate	21.00%	21.00%	35.00%
Income passed through to non-controlling interests	(10.40%)	(9.90%)	(51.10%)
State and local taxes, net of federal benefit	1.90%	2.10%	(1.40%)
Foreign taxes	0.30%	0.30%	0.30%
Permanent items	(0.40%)	(0.80%)	0.30%
Tax Cuts and Jobs Act	0.00%	(0.40%)	(0.40%)
Corporate conversion expense	0.00%	5.40%	0.00%
Other, net	(0.10%)	(0.30%)	0.40%
Valuation allowance	0.00%	0.10%	1.30%
Total effective rate	12.30%	17.50%	(15.60%)
Pro Forma
Income Taxes [Line Items]
Income passed through to non-controlling interests			(23.20%)
State and local taxes, net of federal benefit			0.40%
Foreign taxes			0.30%
Permanent items			0.30%
Tax Cuts and Jobs Act			3.30%
Corporate conversion expense			0.00%
Other, net			0.40%
Valuation allowance			1.30%
Total effective rate			17.80%