LOANS AND ALLOWANCE FOR LOAN LOSSES - Allowances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Allowance for loan losses, by portfolio segment [Roll Forward]
Beginning balance:	$ 18,944	$ 21,161	$ 14,253
Charge Offs	(1,975)	(5,919)	(2,571)
Recoveries	564	549	457
Net (charge offs) recoveries	(1,411)	(5,370)	(2,114)
Provision	5,945	3,153	9,022
Ending balance	23,478	18,944	21,161
Ending allowance balance attributable to loans:
Individually evaluated for impairment				$ 8,097	$ 2,189
Collectively evaluated for impairment				15,381	16,755
Allowance for loan losses	23,478	18,944	21,161	23,478	18,944
Loans:
Loans individually evaluated for impairment				15,665	8,731
Loans collectively evaluated for impairment				1,297,238	1,306,878
Total ending loans balance				1,312,903	1,315,609
Commercial, and Agricultural
Allowance for loan losses, by portfolio segment [Roll Forward]
Beginning balance:	5,383	6,976	1,589
Charge Offs	(312)	(3,644)	(96)
Recoveries	59	47	109
Net (charge offs) recoveries	(253)	(3,597)	13
Provision	5,097	2,004	5,374
Ending balance	10,227	5,383	6,976
Ending allowance balance attributable to loans:
Individually evaluated for impairment				6,000	1,743
Collectively evaluated for impairment				4,227	3,640
Allowance for loan losses	10,227	5,383	6,976	10,227	5,383
Loans:
Loans individually evaluated for impairment				6,147	2,128
Loans collectively evaluated for impairment				224,775	201,284
Total ending loans balance				230,922	203,412
Commercial mortgages
Allowance for loan losses, by portfolio segment [Roll Forward]
Beginning balance:	8,184	8,514	7,270
Charge Offs	(1)	(213)	(419)
Recoveries	4	3	5
Net (charge offs) recoveries	3	(210)	(414)
Provision	682	(120)	1,658
Ending balance	8,869	8,184	8,514
Ending allowance balance attributable to loans:
Individually evaluated for impairment				2,097	446
Collectively evaluated for impairment				6,772	7,738
Allowance for loan losses	8,869	8,184	8,514	8,869	8,184
Loans:
Loans individually evaluated for impairment				8,844	6,146
Loans collectively evaluated for impairment				641,726	656,842
Total ending loans balance				650,570	662,988
Residential Mortgages
Allowance for loan losses, by portfolio segment [Roll Forward]
Beginning balance:	1,226	1,316	1,523
Charge Offs	(151)	(226)	(225)
Recoveries	45	5	30
Net (charge offs) recoveries	(106)	(221)	(195)
Provision	132	131	(12)
Ending balance	1,252	1,226	1,316
Ending allowance balance attributable to loans:
Individually evaluated for impairment				0	0
Collectively evaluated for impairment				1,252	1,226
Allowance for loan losses	1,252	1,226	1,316	1,252	1,226
Loans:
Loans individually evaluated for impairment				525	402
Loans collectively evaluated for impairment				188,349	182,823
Total ending loans balance				188,874	183,225
Consumer Loans
Allowance for loan losses, by portfolio segment [Roll Forward]
Beginning balance:	4,151	4,355	3,871
Charge Offs	(1,511)	(1,836)	(1,831)
Recoveries	456	494	313
Net (charge offs) recoveries	(1,055)	(1,342)	(1,518)
Provision	34	1,138	2,002
Ending balance	3,130	4,151	4,355
Ending allowance balance attributable to loans:
Individually evaluated for impairment				0	0
Collectively evaluated for impairment				3,130	4,151
Allowance for loan losses	$ 3,130	$ 4,151	$ 4,355	3,130	4,151
Loans:
Loans individually evaluated for impairment				149	55
Loans collectively evaluated for impairment				242,388	265,929
Total ending loans balance				$ 242,537	$ 265,984