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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		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning Balance	$ 36,935	$ 36,922	$ 36,922
Charge-offs	(345)	(334)	(1,727)
Recoveries	187	107	566
(Credit) provision for loan losses	(1,164)	439	1,174
Ending Balance	35,613	37,134	36,935
Commercial real estate - non-owner-occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning Balance	16,581	17,296	17,296
Charge-offs	0	0	0
Recoveries	7	1	19
(Credit) provision for loan losses	(1,294)	(973)	(734)
Ending Balance	15,294	16,324	16,581
Commercial real estate - owner-occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning Balance	2,290	2,362	2,362
Charge-offs	0	0	(58)
Recoveries	0	0	0
(Credit) provision for loan losses	(60)	108	(14)
Ending Balance	2,230	2,470	2,290
Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning Balance	4,869	5,446	5,446
Charge-offs	(309)	(312)	(1,560)
Recoveries	92	99	471
(Credit) provision for loan losses	(192)	(652)	512
Ending Balance	4,460	4,581	4,869
Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning Balance	10,254	9,089	9,089
Charge-offs	0	(18)	(18)
Recoveries	6	4	44
(Credit) provision for loan losses	305	1,737	1,139
Ending Balance	10,565	10,812	10,254
Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning Balance	2,217	2,225	2,225
Charge-offs	0	0	0
Recoveries	80	0	1
(Credit) provision for loan losses	63	215	(9)
Ending Balance	2,360	2,440	2,217
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning Balance	724	504	504
Charge-offs	(36)	(4)	(91)
Recoveries	2	3	31
(Credit) provision for loan losses	14	4	280
Ending Balance	$ 704	$ 507	$ 724

X

- Definition

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

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