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LOANS - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Allowance for Loan losses	$ 11,026	$ 8,200	$ 9,836	$ 9,309
Allowance for Loan losses, Charge-offs	(2,249)	(116)	(2,443)	(295)
Allowance for Loan losses, Recoveries	35	15	67	46
Allowance for Loan losses, Provision (Credit)	1,941	1,158	3,293	197
Allowance for Loan losses	10,753	9,257	10,753	9,257
Residential mortgage
Allowance for Loan losses	4,320	3,963	4,182	3,986
Allowance for Loan losses, Charge-offs	0	(50)	0	(157)
Allowance for Loan losses, Recoveries	27	3	32	9
Allowance for Loan losses, Provision (Credit)	(66)	138	67	216
Allowance for Loan losses	4,281	4,054	4,281	4,054
Residential mortgage | Real estate loan | first liens
Allowance for Loan losses	3,531	3,130	3,405	3,156
Allowance for Loan losses, Charge-offs	0	(50)	0	(133)
Allowance for Loan losses, Recoveries	26	1	28	3
Allowance for Loan losses, Provision (Credit)	(92)	83	32	138
Allowance for Loan losses	3,465	3,164	3,465	3,164
Residential mortgage | Real estate loan | junior liens
Allowance for Loan losses	365	333	384	325
Allowance for Loan losses, Charge-offs	0	0	0	(24)
Allowance for Loan losses, Recoveries	0	1	1	1
Allowance for Loan losses, Provision (Credit)	(7)	16	(27)	48
Allowance for Loan losses	358	350	358	350
Residential mortgage | Home equity lines of credit
Allowance for Loan losses	287	280	276	302
Allowance for Loan losses, Charge-offs	0	0	0	0
Allowance for Loan losses, Recoveries	1	1	3	5
Allowance for Loan losses, Provision (Credit)	1	1	10	(25)
Allowance for Loan losses	289	282	289	282
Residential mortgage | Construction Loans
Allowance for Loan losses	137	220	117	203
Allowance for Loan losses, Charge-offs	0	0	0	0
Allowance for Loan losses, Recoveries	0	0	0	0
Allowance for Loan losses, Provision (Credit)	32	38	52	55
Allowance for Loan losses	169	258	169	258
Commercial
Allowance for Loan losses	5,858	3,388	4,788	4,591
Allowance for Loan losses, Charge-offs	(2,219)	0	(2,343)	(6)
Allowance for Loan losses, Recoveries	0	3	0	6
Allowance for Loan losses, Provision (Credit)	1,990	953	3,184	(247)
Allowance for Loan losses	5,629	4,344	5,629	4,344
Commercial | Real estate loan
Allowance for Loan losses	2,426	1,577	1,921	2,538
Allowance for Loan losses, Charge-offs	0	0	0	0
Allowance for Loan losses, Recoveries	0	0	0	0
Allowance for Loan losses, Provision (Credit)	(40)	928	465	(33)
Allowance for Loan losses	2,386	2,505	2,386	2,505
Commercial | Construction Loans
Allowance for Loan losses	420	152	966	110
Allowance for Loan losses, Charge-offs	0	0	(107)	0
Allowance for Loan losses, Recoveries	0	0	0	0
Allowance for Loan losses, Provision (Credit)	20	6	(419)	48
Allowance for Loan losses	440	158	440	158
Commercial | Commercial and industrial
Allowance for Loan losses	2,496	1,246	1,391	1,553
Allowance for Loan losses, Charge-offs	(2,219)	0	(2,236)	(6)
Allowance for Loan losses, Recoveries	0	3	0	6
Allowance for Loan losses, Provision (Credit)	1,974	7	3,096	(297)
Allowance for Loan losses	2,251	1,256	2,251	1,256
Commercial | Loans secured by farm land
Allowance for Loan losses	146	102	158	102
Allowance for Loan losses, Charge-offs	0	0	0	0
Allowance for Loan losses, Recoveries	0	0	0	0
Allowance for Loan losses, Provision (Credit)	(25)	(1)	(37)	(1)
Allowance for Loan losses	121	101	121	101
Commercial | Multi-family (5 or more) residential
Allowance for Loan losses	163	150	156	114
Allowance for Loan losses, Charge-offs	0	0	0	0
Allowance for Loan losses, Recoveries	0	0	0	0
Allowance for Loan losses, Provision (Credit)	64	5	71	41
Allowance for Loan losses	227	155	227	155
Commercial | Agricultural loans
Allowance for Loan losses	40	42	41	46
Allowance for Loan losses, Charge-offs	0	0	0	0
Allowance for Loan losses, Recoveries	0	0	0	0
Allowance for Loan losses, Provision (Credit)	(3)	7	(4)	3
Allowance for Loan losses	37	49	37	49
Commercial | Other commercial loans
Allowance for Loan losses	167	119	155	128
Allowance for Loan losses, Charge-offs	0	0	0	0
Allowance for Loan losses, Recoveries	0	0	0	0
Allowance for Loan losses, Provision (Credit)	0	1	12	(8)
Allowance for Loan losses	167	120	167	120
Consumer
Allowance for Loan losses	263	264	281	233
Allowance for Loan losses, Charge-offs	(30)	(66)	(100)	(132)
Allowance for Loan losses, Recoveries	8	9	35	31
Allowance for Loan losses, Provision (Credit)	17	67	42	142
Allowance for Loan losses	258	274	258	274
Unallocated
Allowance for Loan losses	585	585	585	499
Allowance for Loan losses, Charge-offs	0	0	0	0
Allowance for Loan losses, Recoveries	0	0	0	0
Allowance for Loan losses, Provision (Credit)	0	0	0	86
Allowance for Loan losses	$ 585	$ 585	$ 585	$ 585

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- Definition

Amount of (credit) provision related to estimated loss from loan transactions.

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- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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