REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
REVENUE FROM CONTRACTS WITH CUSTOMERS
Total non-interest income	$ 10,414	$ 8,918
Within the scope of ASC 606
REVENUE FROM CONTRACTS WITH CUSTOMERS
Total non-interest income	8,223	7,441
Not within the scope of ASC 606
REVENUE FROM CONTRACTS WITH CUSTOMERS
Total non-interest income	2,191	1,477
Products and services transferred at a point in time \| Within the scope of ASC 606
REVENUE FROM CONTRACTS WITH CUSTOMERS
Total non-interest income	4,285	3,810
Products and services transferred over time \| Within the scope of ASC 606
REVENUE FROM CONTRACTS WITH CUSTOMERS
Total non-interest income	3,938	3,631
Non-interest Income \| Within the scope of ASC 606
REVENUE FROM CONTRACTS WITH CUSTOMERS
Total non-interest income	8,223	7,441
Trust management fees \| Within the scope of ASC 606
REVENUE FROM CONTRACTS WITH CUSTOMERS
Total non-interest income	3,675	3,459
Financial services fees \| Within the scope of ASC 606
REVENUE FROM CONTRACTS WITH CUSTOMERS
Total non-interest income	440	457
Interchange fees \| Within the scope of ASC 606
REVENUE FROM CONTRACTS WITH CUSTOMERS
Total non-interest income	2,041	1,921
Customer deposit fees \| Within the scope of ASC 606
REVENUE FROM CONTRACTS WITH CUSTOMERS
Total non-interest income	1,756	1,377
Other customer service fees \| Within the scope of ASC 606
REVENUE FROM CONTRACTS WITH CUSTOMERS
Total non-interest income	$ 311	$ 227