LOANS - Contractual Aging of Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
LOANS
Loans current and past due less than 30 days	$ 1,627,899	$ 1,166,748
Loans receivable	1,644,209	1,182,222
Past Due 30-89 Days
LOANS
Loans past due	8,607	10,023
Past Due 90+ Days
LOANS
Loans past due	7,703	5,451
Residential mortgage
LOANS
Loans current and past due less than 30 days	609,576	573,938
Loans receivable	620,172	586,580
Residential mortgage \| Past Due 30-89 Days
LOANS
Loans past due	6,071	8,414
Residential mortgage \| Past Due 90+ Days
LOANS
Loans past due	4,525	4,228
Residential mortgage \| Real estate loan \| first liens
LOANS
Loans current and past due less than 30 days	523,191	499,024
Loans receivable	532,947	510,641
Residential mortgage \| Real estate loan \| first liens \| Past Due 30-89 Days
LOANS
Loans past due	5,703	7,839
Residential mortgage \| Real estate loan \| first liens \| Past Due 90+ Days
LOANS
Loans past due	4,053	3,778
Residential mortgage \| Real estate loan \| junior liens
LOANS
Loans current and past due less than 30 days	27,009	27,041
Loans receivable	27,311	27,503
Residential mortgage \| Real estate loan \| junior liens \| Past Due 30-89 Days
LOANS
Loans past due	111	83
Residential mortgage \| Real estate loan \| junior liens \| Past Due 90+ Days
LOANS
Loans past due	191	379
Residential mortgage \| Home equity lines of credit
LOANS
Loans current and past due less than 30 days	38,919	33,115
Loans receivable	39,301	33,638
Residential mortgage \| Home equity lines of credit \| Past Due 30-89 Days
LOANS
Loans past due	101	452
Residential mortgage \| Home equity lines of credit \| Past Due 90+ Days
LOANS
Loans past due	281	71
Residential mortgage \| Construction Loans
LOANS
Loans current and past due less than 30 days	20,457	14,758
Loans receivable	20,613	14,798
Residential mortgage \| Construction Loans \| Past Due 30-89 Days
LOANS
Loans past due	156	40
Residential mortgage \| Construction Loans \| Past Due 90+ Days
LOANS
Loans past due	0	0
Commercial
LOANS
Loans current and past due less than 30 days	1,002,260	576,314
Loans receivable	1,007,751	578,901
Commercial \| Past Due 30-89 Days
LOANS
Loans past due	2,453	1,420
Commercial \| Past Due 90+ Days
LOANS
Loans past due	3,038	1,167
Commercial \| Real estate loan
LOANS
Loans current and past due less than 30 days	529,998	299,640
Loans receivable	531,810	301,227
Commercial \| Real estate loan \| Past Due 30-89 Days
LOANS
Loans past due	66	737
Commercial \| Real estate loan \| Past Due 90+ Days
LOANS
Loans past due	1,746	850
Commercial \| Construction Loans
LOANS
Loans current and past due less than 30 days	42,590	33,505
Loans receivable	42,874	33,555
Commercial \| Construction Loans \| Past Due 30-89 Days
LOANS
Loans past due	284	0
Commercial \| Construction Loans \| Past Due 90+ Days
LOANS
Loans past due	0	50
Commercial \| Commercial and industrial
LOANS
Loans current and past due less than 30 days	158,523	126,221
Loans receivable	159,577	126,374
Commercial \| Commercial and industrial \| Past Due 30-89 Days
LOANS
Loans past due	55	16
Commercial \| Commercial and industrial \| Past Due 90+ Days
LOANS
Loans past due	999	137
Commercial \| Small Business Administration - Paycheck Protection Program
LOANS
Loans current and past due less than 30 days	132,269	0
Loans receivable	132,269	0
Commercial \| Small Business Administration - Paycheck Protection Program \| Past Due 30-89 Days
LOANS
Loans past due	0	0
Commercial \| Small Business Administration - Paycheck Protection Program \| Past Due 90+ Days
LOANS
Loans past due	0	0
Commercial \| Political subdivisions
LOANS
Loans current and past due less than 30 days	53,221	53,570
Loans receivable	53,221	53,570
Commercial \| Political subdivisions \| Past Due 30-89 Days
LOANS
Loans past due	0	0
Commercial \| Political subdivisions \| Past Due 90+ Days
LOANS
Loans past due	0	0
Commercial \| Commercial Construction And Land
LOANS
Loans receivable	42,874
Commercial \| Loans secured by farm land
LOANS
Loans current and past due less than 30 days	11,419	11,455
Loans receivable	11,736	12,251
Commercial \| Loans secured by farm land \| Past Due 30-89 Days
LOANS
Loans past due	95	666
Commercial \| Loans secured by farm land \| Past Due 90+ Days
LOANS
Loans past due	222	130
Commercial \| Multi-family (5 or more) residential
LOANS
Loans current and past due less than 30 days	53,860	31,070
Loans receivable	55,811	31,070
Commercial \| Multi-family (5 or more) residential \| Past Due 30-89 Days
LOANS
Loans past due	1,951	0
Commercial \| Multi-family (5 or more) residential \| Past Due 90+ Days
LOANS
Loans past due	0	0
Commercial \| Agricultural loans
LOANS
Loans current and past due less than 30 days	3,091	4,318
Loans receivable	3,164	4,319
Commercial \| Agricultural loans \| Past Due 30-89 Days
LOANS
Loans past due	2	1
Commercial \| Agricultural loans \| Past Due 90+ Days
LOANS
Loans past due	71	0
Commercial \| Other commercial loans
LOANS
Loans current and past due less than 30 days	17,289	16,535
Loans receivable	17,289	16,535
Commercial \| Other commercial loans \| Past Due 30-89 Days
LOANS
Loans past due	0	0
Commercial \| Other commercial loans \| Past Due 90+ Days
LOANS
Loans past due	0	0
Consumer
LOANS
Loans current and past due less than 30 days	16,063	16,496
Loans receivable	16,286	16,741
Consumer \| Past Due 30-89 Days
LOANS
Loans past due	83	189
Consumer \| Past Due 90+ Days
LOANS
Loans past due	$ 140	$ 56