REVENUE FROM CONTRACTS WITH CUSTOMERS - Revenue By Operating Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Gains (losses) on sales of other real estate	$ (48)	$ (9)	$ (4)	$ 8
Financial services revenue	59	53	105	122
Total non-interest income	5,325	5,022	10,800	9,869
Overdraft fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, including assessed tax	939	971	1,904	1,950
Other
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, including assessed tax	205	254	404	459
Interchange revenue from debit card transactions
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, including assessed tax	996	964	2,031	1,884
WMG fee income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, including assessed tax	2,373	2,269	4,689	4,378
CFS fee and commission income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, including assessed tax	135	174	245	312
Net gains (losses) on sales of OREO
Disaggregation of Revenue [Line Items]
Gains (losses) on sales of other real estate	(48)	(9)	(4)	8
Net gains on sales of loans
Disaggregation of Revenue [Line Items]
Financial services revenue	59	53	105	122
Loan servicing fees
Disaggregation of Revenue [Line Items]
Financial services revenue	22	21	45	41
Sale of securities
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, including assessed tax	0	12	0	12
Financial services revenue		12		12
Other
Disaggregation of Revenue [Line Items]
Financial services revenue	644	313	1,381	703
Core Banking
Disaggregation of Revenue [Line Items]
Total non-interest income	2,822	2,634	6,005	5,239
Core Banking | Overdraft fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, including assessed tax	939	971	1,904	1,950
Core Banking | Other
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, including assessed tax	205	254	404	459
Core Banking | Interchange revenue from debit card transactions
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, including assessed tax	996	964	2,031	1,884
Core Banking | WMG fee income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, including assessed tax	0	0	0	0
Core Banking | CFS fee and commission income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, including assessed tax	0	0	0	0
Core Banking | Net gains (losses) on sales of OREO
Disaggregation of Revenue [Line Items]
Gains (losses) on sales of other real estate	(48)	(9)	(4)	8
Core Banking | Net gains on sales of loans
Disaggregation of Revenue [Line Items]
Financial services revenue	59	53	105	122
Core Banking | Loan servicing fees
Disaggregation of Revenue [Line Items]
Financial services revenue	22	21	45	41
Core Banking | Sale of securities
Disaggregation of Revenue [Line Items]
Financial services revenue		12		12
Core Banking | Other
Disaggregation of Revenue [Line Items]
Financial services revenue	649	368	1,520	763
WMG
Disaggregation of Revenue [Line Items]
Total non-interest income	2,373	2,269	4,689	4,378
WMG | Overdraft fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, including assessed tax	0	0	0	0
WMG | Other
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, including assessed tax	0	0	0	0
WMG | Interchange revenue from debit card transactions
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, including assessed tax	0	0	0	0
WMG | WMG fee income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, including assessed tax	2,373	2,269	4,689	4,378
WMG | CFS fee and commission income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, including assessed tax	0	0	0	0
WMG | Net gains (losses) on sales of OREO
Disaggregation of Revenue [Line Items]
Gains (losses) on sales of other real estate	0	0	0	0
WMG | Net gains on sales of loans
Disaggregation of Revenue [Line Items]
Financial services revenue	0	0	0	0
WMG | Loan servicing fees
Disaggregation of Revenue [Line Items]
Financial services revenue	0	0	0	0
WMG | Sale of securities
Disaggregation of Revenue [Line Items]
Financial services revenue		0		0
WMG | Other
Disaggregation of Revenue [Line Items]
Financial services revenue	0	0	0	0
Holding Company, CFS, and CRM
Disaggregation of Revenue [Line Items]
Total non-interest income	130	119	106	252
Holding Company, CFS, and CRM | Overdraft fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, including assessed tax	0	0	0	0
Holding Company, CFS, and CRM | Other
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, including 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, including assessed tax	0	0	0	0
Holding Company, CFS, and CRM | WMG fee income
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, including 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, including assessed tax	135	174	245	312
Holding Company, CFS, and CRM | Net gains (losses) on sales of OREO
Disaggregation of Revenue [Line Items]
Gains (losses) on sales of other real estate	0	0	0	0
Holding Company, CFS, and CRM | Net gains on sales of loans
Disaggregation of Revenue [Line Items]
Financial services revenue	0	0	0	0
Holding Company, CFS, and CRM | Loan servicing fees
Disaggregation of Revenue [Line Items]
Financial services revenue	0	0	0	0
Holding Company, CFS, and CRM | Sale of securities
Disaggregation of Revenue [Line Items]
Financial services revenue		0		0
Holding Company, CFS, and CRM | Other
Disaggregation of Revenue [Line Items]
Financial services revenue	$ (5)	$ (55)	$ (139)	$ (60)