INCOME TAXES - TAX RATE RECONCILIATION (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Income tax expense at statutory rate	21.00%	21.00%	35.00%
State income taxes - net of federal benefit	6.80%	3.50%	3.50%
Non-deductible expenses	2.60%	0.40%	0.30%
Transaction costs	41.20%	0.00%	0.00%
Tax credits	(1.60%)	0.00%	0.00%
Equity compensation	(30.00%)	(2.90%)	(1.40%)
Revaluation of deferred	0.00%	(0.20%)	(2.00%)
Other adjustments	(0.40%)	(0.70%)	(0.50%)
Total income tax provision	39.60%	21.10%	34.90%