LOANS AND ALLOWANCE FOR CREDIT LOSSES - Summary of Total Loans (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025	Dec. 31, 2024
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Total loans	$ 3,585,248	$ 3,605,859
Allowance for credit losses	34,315	34,052	$ 28,614	$ 28,744
Net loans	3,550,933	3,571,807
Accrued interest receivable for loans	13,100	11,500
Tax exempt and other
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Allowance for credit losses	111	119
Municipal and other
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Total loans	37,713	43,106
Allowance for credit losses			112	128
Home equity
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Total loans	114,267	114,484
Allowance for credit losses	777	814	744	741
Total commercial loans \| Commercial construction
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Total loans	219,802	213,779
Allowance for credit losses	4,328	4,371	2,065	2,096
Total commercial real estate \| Commercial real estate owner occupied
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Total loans	360,331	385,843
Allowance for credit losses	3,627	4,045	2,830	2,794
Total commercial real estate \| Commercial real estate non-owner occupied
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Total loans	1,431,667	1,450,597
Allowance for credit losses	13,809	12,837	10,923	11,104
Total commercial and industrial \| Commercial and industrial
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Total loans	345,800	315,370
Allowance for credit losses	5,549	5,378	5,414	5,064
Total residential real estate \| Residential real estate
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Total loans	1,061,921	1,068,413
Allowance for credit losses	5,972	6,350	6,447	6,732
Total consumer \| Consumer other
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Total loans	13,747	14,267
Allowance for credit losses	$ 142	$ 138	$ 79	$ 85

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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-Topic 310
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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