INCOME TAXES - Components of provision for income tax expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
INCOME TAXES
Deferred tax provision (benefit)	$ 158	$ 622
Effective Income Tax Rate Reconciliation, Percent	19.85%	19.86%
Total income tax expense	$ 1,868	$ 2,599
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%