REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Disaggregation of Revenue [Line Items]
Total non-interest income	$ 4,646	$ 9,457	$ 13,564	$ 17,843
Within the scope of ASC 606
Disaggregation of Revenue [Line Items]
Total non-interest income	7,852	7,930	15,293	15,310
Not within the scope of ASC 606
Disaggregation of Revenue [Line Items]
Total non-interest income	(3,206)	1,527	(1,729)	2,533
Products and services transferred at a point in time \| Within the scope of ASC 606
Disaggregation of Revenue [Line Items]
Total non-interest income	3,813	3,969	7,622	7,895
Products and services transferred over time \| Within the scope of ASC 606
Disaggregation of Revenue [Line Items]
Total non-interest income	4,039	3,961	7,671	7,415
Non-interest Income \| Within the scope of ASC 606
Disaggregation of Revenue [Line Items]
Total non-interest income	7,852	7,930	15,293	15,310
Trust management fees \| Within the scope of ASC 606
Disaggregation of Revenue [Line Items]
Total non-interest income	3,865	3,745	7,324	6,987
Financial services fees \| Within the scope of ASC 606
Disaggregation of Revenue [Line Items]
Total non-interest income	398	448	855	876
Interchange fees \| Within the scope of ASC 606
Disaggregation of Revenue [Line Items]
Total non-interest income	1,850	1,895	3,771	3,865
Customer deposit fees \| Within the scope of ASC 606
Disaggregation of Revenue [Line Items]
Total non-interest income	1,470	1,587	2,847	3,089
Other customer service fees \| Within the scope of ASC 606
Disaggregation of Revenue [Line Items]
Total non-interest income	$ 269	$ 255	$ 496	$ 493