INCOME TAXES - Provision for income taxes (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ 8,625	$ 8,481	$ (1,617)
State	1,658	247	201
Total	10,283	8,728	(1,416)
Deferred:
Federal	(143)	(680)	3,620
State	130	1,913	1,285
Valuation Allowance	(40)	(8)	(68)
Total	(53)	1,225	4,837
Total
Federal	8,482	7,801	2,003
State	1,788	2,160	1,486
Valuation Allowance	(40)	(8)	(68)
Total	$ 10,230	$ 9,953	$ 3,421

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