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REVENUE FROM CONTRACTS WITH CUSTOMERS - Revenue By Operating Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Net gains (losses) on sales of OREO	$ 6	$ (1)	$ (71)	$ (87)
Net gains on sales of loans held for sale	553	69	916	146
Net gains on security transactions	0	0	0	19
Changes in fair value of equity investments	57	(10)	(33)	106
Income from bank owned life insurance	14	17	147	48
Other	471	367	1,940	1,177
Total non-interest income	5,339	4,956	15,150	14,967
Overdraft fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	668	959	1,894	2,703
Other
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	72	182	400	627
Interchange revenue from debit card transactions
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	1,082	1,058	2,989	3,113
WMG fee income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	2,416	2,315	6,968	7,115
CFS fee and commission income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	172	145	502	502
Net gains (losses) on sales of OREO
Disaggregation of Revenue [Line Items]
Net gains (losses) on sales of OREO	6	(1)	(71)	(87)
Net gains on sales of loans
Disaggregation of Revenue [Line Items]
Net gains on sales of loans held for sale	553	69	916	146
Loan servicing fees
Disaggregation of Revenue [Line Items]
Loan servicing fees	32	25	88	76
Sale of securities
Disaggregation of Revenue [Line Items]
Net gains on security transactions				19
Income from bank-owned life insurance
Disaggregation of Revenue [Line Items]
Income from bank owned life insurance	14	17	147	48
Other
Disaggregation of Revenue [Line Items]
Other	267	197	1,350	599
Core Banking
Disaggregation of Revenue [Line Items]
Changes in fair value of equity investments	71	3	49	103
Total non-interest income	2,818	2,564	7,795	7,544
Core Banking \| Overdraft fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	668	959	1,894	2,703
Core Banking \| Other
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	72	182	400	627
Core Banking \| Interchange revenue from debit card transactions
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	1,082	1,058	2,989	3,113
Core Banking \| WMG fee income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
Core Banking \| CFS fee and commission income
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
Disaggregation of Revenue [Line Items]
Net gains (losses) on sales of OREO	6	(1)	(71)	(87)
Core Banking \| Net gains on sales of loans
Disaggregation of Revenue [Line Items]
Net gains on sales of loans held for sale	553	69	916	146
Core Banking \| Loan servicing fees
Disaggregation of Revenue [Line Items]
Loan servicing fees	32	25	88	76
Core Banking \| Sale of securities
Disaggregation of Revenue [Line Items]
Net gains on security transactions				19
Core Banking \| Income from bank-owned life insurance
Disaggregation of Revenue [Line Items]
Income from bank owned life insurance	14	17	147	48
Core Banking \| Other
Disaggregation of Revenue [Line Items]
Other	320	252	1,383	796
WMG
Disaggregation of Revenue [Line Items]
Changes in fair value of equity investments	0	0	0	0
Total non-interest income	2,416	2,315	6,968	7,115
WMG \| Overdraft fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
WMG \| Other
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
WMG \| Interchange revenue from debit card transactions
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
WMG \| WMG fee income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	2,416	2,315	6,968	7,115
WMG \| CFS fee and commission income
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
Disaggregation of Revenue [Line Items]
Net gains (losses) on sales of OREO	0	0	0	0
WMG \| Net gains on sales of loans
Disaggregation of Revenue [Line Items]
Net gains on sales of loans held for sale	0	0	0	0
WMG \| Loan servicing fees
Disaggregation of Revenue [Line Items]
Loan servicing fees	0	0	0	0
WMG \| Sale of securities
Disaggregation of Revenue [Line Items]
Net gains on security transactions				0
WMG \| Income from bank-owned life insurance
Disaggregation of Revenue [Line Items]
Income from bank owned life insurance	0	0	0	0
WMG \| Other
Disaggregation of Revenue [Line Items]
Other	0	0	0	0
Holding Company, CFS, and CRM
Disaggregation of Revenue [Line Items]
Changes in fair value of equity investments	(14)	(13)	(82)	3
Total non-interest income	105	77	387	308
Holding Company, CFS, and CRM \| Overdraft fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
Holding Company, CFS, and CRM \| Other
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
Holding Company, CFS, and CRM \| Interchange revenue from debit card transactions
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
Holding Company, CFS, and CRM \| WMG fee income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	0	0	0	0
Holding Company, CFS, and CRM \| CFS fee and commission income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	172	145	502	502
Holding Company, CFS, and CRM \| Net gains (losses) on sales of OREO
Disaggregation of Revenue [Line Items]
Net gains (losses) on sales of OREO	0	0	0	0
Holding Company, CFS, and CRM \| Net gains on sales of loans
Disaggregation of Revenue [Line Items]
Net gains on sales of loans held for sale	0	0	0	0
Holding Company, CFS, and CRM \| Loan servicing fees
Disaggregation of Revenue [Line Items]
Loan servicing fees	0	0	0	0
Holding Company, CFS, and CRM \| Sale of securities
Disaggregation of Revenue [Line Items]
Net gains on security transactions				0
Holding Company, CFS, and CRM \| Income from bank-owned life insurance
Disaggregation of Revenue [Line Items]
Income from bank owned life insurance	0	0	0	0
Holding Company, CFS, and CRM \| Other
Disaggregation of Revenue [Line Items]
Other	$ (53)	$ (55)	$ (33)	$ (197)