INCOME TAXES - Provision for income taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current tax provision:
Federal	$ 2,699	$ 2,366	$ 3,059
State	412	483	328
Total current tax provision	3,111	2,849	3,387
Deferred tax provision:
Federal	575	943	2,328
State	10	118	(3)
Total deferred tax provision	585	1,061	2,325
Income Tax Expense (Benefit), Total	$ 3,696	$ 3,910	$ 5,712