ALLOWANCE FOR LOAN LOSSES - Allowance Activity (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Activity in the allowance for loan losses
Balance at beginning of period			$ 13,866
Provision (releases) for loan losses	$ 562	$ 770	886	$ 1,565
Balance at end of period	14,572		14,572
Allowance For Loan Losses
Total	14,572		13,866		$ 14,572
Business Activities Loans
Activity in the allowance for loan losses
Balance at beginning of period	13,702	12,414	13,581	12,153
Charged-off loans	(35)	(399)	(145)	(653)
Recoveries on charged-off loans	117	52	155	72
Provision (releases) for loan losses	506	656	699	1,151
Balance at end of period	14,290	12,723	14,290	12,723
Allowance For Loan Losses
Individually evaluated for impairment					564	$ 796
Collectively evaluated					13,726	11,927
Total	13,702	12,414	13,581	12,153	14,290	12,723
Business Activities Loans \| Commercial real estate
Activity in the allowance for loan losses
Balance at beginning of period	6,575	5,998	6,811	6,037
Charged-off loans	0	(156)	(57)	(156)
Recoveries on charged-off loans	114	46	130	61
Provision (releases) for loan losses	517	479	322	425
Balance at end of period	7,206	6,367	7,206	6,367
Allowance For Loan Losses
Individually evaluated for impairment					449	682
Collectively evaluated					6,757	5,685
Total	6,575	5,998	6,811	6,037	7,206	6,367
Business Activities Loans \| Commercial and industrial
Activity in the allowance for loan losses
Balance at beginning of period	2,778	2,612	2,380	2,373
Charged-off loans	(13)	(27)	(13)	(111)
Recoveries on charged-off loans	1	4	1	6
Provision (releases) for loan losses	(18)	(80)	380	241
Balance at end of period	2,748	2,509	2,748	2,509
Allowance For Loan Losses
Individually evaluated for impairment					39	34
Collectively evaluated					2,709	2,475
Total	2,778	2,612	2,380	2,373	2,748	2,509
Business Activities Loans \| Residential real estate
Activity in the allowance for loan losses
Balance at beginning of period	3,953	3,304	3,982	3,357
Charged-off loans	0	0	0	0
Recoveries on charged-off loans	0	0	18	1
Provision (releases) for loan losses	(11)	150	(58)	96
Balance at end of period	3,942	3,454	3,942	3,454
Allowance For Loan Losses
Individually evaluated for impairment					75	80
Collectively evaluated					3,867	3,374
Total	3,953	3,304	3,982	3,357	3,942	3,454
Business Activities Loans \| Consumer
Activity in the allowance for loan losses
Balance at beginning of period	396	500	408	386
Charged-off loans	(22)	(216)	(75)	(386)
Recoveries on charged-off loans	2	2	6	4
Provision (releases) for loan losses	18	107	55	389
Balance at end of period	394	393	394	393
Allowance For Loan Losses
Individually evaluated for impairment					1	0
Collectively evaluated					393	393
Total	396	500	408	386	394	393
Acquired Loans
Activity in the allowance for loan losses
Balance at beginning of period	295	265	285	172
Charged-off loans	(69)	(118)	(190)	(325)
Recoveries on charged-off loans	0	106	0	106
Provision (releases) for loan losses	56	114	187	414
Balance at end of period	282	367	282	367
Allowance For Loan Losses
Individually evaluated for impairment					47	77
Collectively evaluated					235	290
Total	295	265	285	172	282	367
Acquired Loans \| Commercial real estate
Activity in the allowance for loan losses
Balance at beginning of period	161	83	173	97
Charged-off loans	0	0	0	(106)
Recoveries on charged-off loans	0	18	0	18
Provision (releases) for loan losses	(2)	99	(14)	191
Balance at end of period	159	200	159	200
Allowance For Loan Losses
Individually evaluated for impairment					12	0
Collectively evaluated					147	200
Total	161	83	173	97	159	200
Acquired Loans \| Commercial and industrial
Activity in the allowance for loan losses
Balance at beginning of period	29	124	35	16
Charged-off loans	0	(37)	(15)	(95)
Recoveries on charged-off loans	0	6	0	6
Provision (releases) for loan losses	(7)	(11)	2	155
Balance at end of period	22	82	22	82
Allowance For Loan Losses
Individually evaluated for impairment					0	77
Collectively evaluated					22	5
Total	29	124	35	16	22	82
Acquired Loans \| Residential real estate
Activity in the allowance for loan losses
Balance at beginning of period	105	58	77	59
Charged-off loans	(65)	(64)	(170)	(64)
Recoveries on charged-off loans	0	0	0	0
Provision (releases) for loan losses	61	91	194	90
Balance at end of period	101	85	101	85
Allowance For Loan Losses
Individually evaluated for impairment					35	0
Collectively evaluated					66	85
Total	105	58	77	59	101	85
Acquired Loans \| Consumer
Activity in the allowance for loan losses
Balance at beginning of period	0	0	0	0
Charged-off loans	(4)	(17)	(5)	(60)
Recoveries on charged-off loans	0	82	0	82
Provision (releases) for loan losses	4	(65)	5	(22)
Balance at end of period	0	0	0	0
Allowance For Loan Losses
Individually evaluated for impairment					0	0
Collectively evaluated					0	0
Total	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount of expense related to estimated loss from loan and lease transactions.

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