Income Taxes - Provision for Income Taxes (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Tax provision at U.S. Federal statutory rates	21.00%	21.00%	35.00%
State income taxes net of federal benefit	8.10%	6.70%	4.40%
Non-deductible permanent items	3.30%	1.30%	(9.70%)
Non-taxable entities	(2.70%)	(0.70%)	(1.90%)
Stock-based compensation	(1.50%)	(1.80%)	0.90%
Change in valuation allowance	13.70%	0.00%	(2.90%)
Entity Conversion	(10.50%)	0.50%	0.00%
Change in rate	0.00%	0.00%	(19.40%)
Other	0.20%	0.10%	1.40%
Effective income tax rate	31.60%	27.10%	7.80%