INCOME TAXES - Reconciliation of tax rate (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
INCOME TAXES
Federal income tax computed at statutory rates	21.00%	21.00%	35.00%
(Decrease) increase in taxes resulting from:
State and local taxes, net of Federal tax benefit	2.40%	0.60%
Permanent differences - net	3.10%	5.20%
Foreign rate differential	0.00%	(0.70%)
Tax Cuts and Jobs Act of 2017	0.00%	(3.40%)
Other	0.30%	0.10%
Income tax expense	26.80%	22.80%