REVENUE FROM CONTRACTS WITH CUSTOMERS - Revenue By Operating Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Net gains (losses) on sales of OREO	$ 0	$ 6	$ (18)	$ (71)
Changes in fair value of equity investments	15	57	203	(33)
Income from bank owned life insurance	13	14	39	147
Total non-interest income	5,970	5,339	18,083	15,150
Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Changes in fair value of equity investments	28	(14)	86	(82)
Total non-interest income	368	105	850	387
Overdraft fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	623	668	1,561	1,894
Overdraft fees | Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
Other
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	233	72	744	400
Other | Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
Interchange revenue from debit card transactions
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	1,237	1,082	3,622	2,989
Interchange revenue from debit card transactions | Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
WMG fee income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	2,765	2,416	8,246	6,968
WMG fee income | Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
CFS fee and commission income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	346	172	796	502
CFS fee and commission income | Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	346	172	796	502
Net gains (losses) on sales of OREO
Disaggregation of Revenue [Line Items]
Net gains (losses) on sales of OREO	0	6	(18)	(71)
Net gains (losses) on sales of OREO | Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Net gains (losses) on sales of OREO	0	0	0	0
Net gains on sales of loans
Disaggregation of Revenue [Line Items]
Revenue not from contact with customer	242	553	884	916
Net gains on sales of loans | Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Revenue not from contact with customer	0	0	0	0
Loan servicing fees
Disaggregation of Revenue [Line Items]
Revenue not from contact with customer	38	32	108	88
Loan servicing fees | Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Revenue not from contact with customer	0	0	0	0
Income from bank-owned life insurance
Disaggregation of Revenue [Line Items]
Income from bank owned life insurance	13	14	39	147
Income from bank-owned life insurance | Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Income from bank owned life insurance	0	0	0	0
Other
Disaggregation of Revenue [Line Items]
Revenue not from contact with customer	458	267	1,898	1,350
Other | Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Revenue not from contact with customer	(6)	(53)	(32)	(33)
Core Banking | Operating Segments
Disaggregation of Revenue [Line Items]
Changes in fair value of equity investments	(13)	71	117	49
Total non-interest income	2,837	2,818	8,987	7,795
Core Banking | Overdraft fees | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	623	668	1,561	1,894
Core Banking | Other | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	233	72	744	400
Core Banking | Interchange revenue from debit card transactions | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	1,237	1,082	3,622	2,989
Core Banking | WMG fee income | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
Core Banking | CFS fee and commission income | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
Core Banking | Net gains (losses) on sales of OREO | Operating Segments
Disaggregation of Revenue [Line Items]
Net gains (losses) on sales of OREO	0	6	(18)	(71)
Core Banking | Net gains on sales of loans | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue not from contact with customer	242	553	884	916
Core Banking | Loan servicing fees | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue not from contact with customer	38	32	108	88
Core Banking | Income from bank-owned life insurance | Operating Segments
Disaggregation of Revenue [Line Items]
Income from bank owned life insurance	13	14	39	147
Core Banking | Other | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue not from contact with customer	464	320	1,930	1,383
WMG | Operating Segments
Disaggregation of Revenue [Line Items]
Changes in fair value of equity investments	0	0	0	0
Total non-interest income	2,765	2,416	8,246	6,968
WMG | Overdraft fees | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
WMG | Other | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
WMG | Interchange revenue from debit card transactions | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
WMG | WMG fee income | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	2,765	2,416	8,246	6,968
WMG | CFS fee and commission income | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
WMG | Net gains (losses) on sales of OREO | Operating Segments
Disaggregation of Revenue [Line Items]
Net gains (losses) on sales of OREO	0	0	0	0
WMG | Net gains on sales of loans | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue not from contact with customer	0	0	0	0
WMG | Loan servicing fees | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue not from contact with customer	0	0	0	0
WMG | Income from bank-owned life insurance | Operating Segments
Disaggregation of Revenue [Line Items]
Income from bank owned life insurance	0	0	0	0
WMG | Other | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue not from contact with customer	$ 0	$ 0	$ 0	$ 0