LOANS AND ALLOWANCE FOR CREDIT LOSSES ON LOANS (Activity in Allowance for Credit Losses on Loans by Portfolio Segment) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	$ 35,775	$ 26,521	$ 37,865	$ 25,171	$ 25,171
Loans charged off	(420)	(484)	(707)	(974)	(1,838)
Recoveries	157	102	208	170	1,084
Provision	(3,452)	9,400	(5,306)	11,172	13,215
Ending balance	32,060	35,539	32,060	35,539	37,865
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance				233	233
Commercial real estate - non owner-occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	22,473		21,778	10,924	10,924
Loans charged off	0		0		(82)
Recoveries	0		0		107
Provision	(2,896)		(2,201)		11,497
Ending balance	19,577		19,577		21,778
Commercial real estate - non owner-occupied \| Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance				(668)	(668)
Commercial real estate - owner-occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	2,548		2,832	1,490	1,490
Loans charged off	0		0		(21)
Recoveries	3		5		13
Provision	(35)		(321)		1,440
Ending balance	2,516		2,516		2,832
Commercial real estate - owner-occupied \| Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance				(90)	(90)
Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	5,170	4,297	6,703	3,985	3,985
Loans charged off	(259)	(420)	(406)	(673)	(1,130)
Recoveries	67	63	110	116	572
Provision	(636)	909	(2,065)	1,421	1,728
Ending balance	4,342	4,849	4,342	4,849	6,703
Commercial \| Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance				1,548	1,548
SBA PPP Portfolio Segment
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	87	0	69	0	0
Loans charged off	0	0	0	0	0
Recoveries	0	0	0	0	0
Provision	(21)	113	(3)	113	69
Ending balance	66	113	66	113	69
SBA PPP Portfolio Segment \| Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance				0	0
Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	3,093	5,897	3,474	5,842	5,842
Loans charged off	(35)	0	(88)	(96)	(121)
Recoveries	70	21	70	23	292
Provision	77	2,685	(251)	2,834	(1,410)
Ending balance	3,205	8,603	3,205	8,603	3,474
Residential real estate \| Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance				(1,129)	(1,129)
Home Equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	2,176	2,480	2,616	2,423	2,423
Loans charged off	(107)	(17)	(145)	(51)	(317)
Recoveries	0	0	0	4	33
Provision	(4)	621	(406)	708	(315)
Ending balance	2,065	3,084	2,065	3,084	2,616
Home Equity \| Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance				792	792
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	228	473	393	507	507
Loans charged off	(19)	(26)	(68)	(83)	(167)
Recoveries	17	15	23	20	67
Provision	63	42	(59)	60	206
Ending balance	$ 289	$ 504	$ 289	504	393
Consumer \| Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance				$ (220)	$ (220)

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

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