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ALLOWANCE FOR LOAN LOSSES - Allowance Activity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Activity in the allowance for loan losses
Balance at beginning of period			$ 15,353
Provision (release) for loan losses	$ 1,354	$ 562	2,465	$ 886
Balance at end of period	16,509		16,509
Allowance For Loan Losses
Total	16,509		15,353		$ 16,509
Business Activities Loans
Activity in the allowance for loan losses
Balance at beginning of period	15,101	13,702	15,057	13,581
Charged-off loans	(209)	(35)	(1,281)	(145)
Recoveries on charged-off loans	74	117	81	155
Provision (release) for loan losses	1,012	506	2,121	699
Balance at end of period	15,978	14,290	15,978	14,290
Allowance For Loan Losses
Individually evaluated for impairment					766	$ 564
Collectively evaluated					15,212	13,726
Total	15,978	14,290	15,057	14,290	15,978	14,290
Business Activities Loans | Total commercial real estate
Activity in the allowance for loan losses
Balance at beginning of period	7,661	6,575	7,668	6,811
Charged-off loans			(771)	(57)
Recoveries on charged-off loans	71	114	78	130
Provision (release) for loan losses	684	517	1,441	322
Balance at end of period	8,416	7,206	8,416	7,206
Allowance For Loan Losses
Individually evaluated for impairment					687	449
Collectively evaluated					7,729	6,757
Total	8,416	7,206	8,416	6,811	8,416	7,206
Business Activities Loans | Total commercial and industrial
Activity in the allowance for loan losses
Balance at beginning of period	3,543	2,778	3,608	2,380
Charged-off loans	(153)	(13)	(304)	(13)
Recoveries on charged-off loans	1	1	1	1
Provision (release) for loan losses	(150)	(18)	(64)	380
Balance at end of period	3,241	2,748	3,241	2,748
Allowance For Loan Losses
Individually evaluated for impairment					18	39
Collectively evaluated					3,223	2,709
Total	3,241	2,748	3,241	2,380	3,241	2,748
Business Activities Loans | Total residential real estate
Activity in the allowance for loan losses
Balance at beginning of period	3,513	3,953	3,402	3,982
Charged-off loans	(21)		(21)
Recoveries on charged-off loans				18
Provision (release) for loan losses	453	(11)	564	(58)
Balance at end of period	3,945	3,942	3,945	3,942
Allowance For Loan Losses
Individually evaluated for impairment					60	75
Collectively evaluated					3,885	3,867
Total	3,945	3,942	3,945	3,982	3,945	3,942
Business Activities Loans | Total consumer
Activity in the allowance for loan losses
Balance at beginning of period	384	396	379	408
Charged-off loans	(35)	(22)	(185)	(75)
Recoveries on charged-off loans	2	2	2	6
Provision (release) for loan losses	25	18	180	55
Balance at end of period	376	394	376	394
Allowance For Loan Losses
Individually evaluated for impairment					1	1
Collectively evaluated					375	393
Total	376	394	376	408	376	394
Acquired Loans
Activity in the allowance for loan losses
Balance at beginning of period	196	295	296	285
Charged-off loans	(11)	(69)	(151)	(190)
Recoveries on charged-off loans	4		42
Provision (release) for loan losses	342	56	344	187
Balance at end of period	531	282	531	282
Allowance For Loan Losses
Individually evaluated for impairment					441	47
Collectively evaluated					90	235
Total	531	282	296	285	531	282
Acquired Loans | Total commercial real estate
Activity in the allowance for loan losses
Balance at beginning of period	64	161	147	173
Charged-off loans			(101)
Recoveries on charged-off loans			18
Provision (release) for loan losses	337	(2)	337	(14)
Balance at end of period	401	159	401	159
Allowance For Loan Losses
Individually evaluated for impairment					365	12
Collectively evaluated					36	147
Total	401	159	147	173	401	159
Acquired Loans | Total commercial and industrial
Activity in the allowance for loan losses
Balance at beginning of period	3	29	6	35
Charged-off loans	(3)		(33)	(15)
Recoveries on charged-off loans			9
Provision (release) for loan losses	12	(7)	30	2
Balance at end of period	12	22	12	22
Allowance For Loan Losses
Individually evaluated for impairment					9
Collectively evaluated					3	22
Total	12	22	6	35	12	22
Acquired Loans | Total residential real estate
Activity in the allowance for loan losses
Balance at beginning of period	129	105	143	77
Charged-off loans	(3)	(65)	(11)	(170)
Recoveries on charged-off loans	4		11
Provision (release) for loan losses	(12)	61	(25)	194
Balance at end of period	118	101	118	101
Allowance For Loan Losses
Individually evaluated for impairment					67	35
Collectively evaluated					51	66
Total	118	101	143	77	$ 118	$ 101
Acquired Loans | Total consumer
Activity in the allowance for loan losses
Charged-off loans	(5)	(4)	(6)	(5)
Recoveries on charged-off loans			4
Provision (release) for loan losses	$ 5	$ 4	$ 2	$ 5

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- Definition

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 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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