REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
REVENUE FROM CONTRACTS WITH CUSTOMERS
Total non-interest income	$ 10,847	$ 10,567	$ 32,993	$ 24,131
Within the scope of ASC 606
REVENUE FROM CONTRACTS WITH CUSTOMERS
Total non-interest income	8,757	8,214	26,279	23,507
Not within the scope of ASC 606
REVENUE FROM CONTRACTS WITH CUSTOMERS
Total non-interest income	2,090	2,353	6,714	624
Products and services transferred at a point in time \| Within the scope of ASC 606
REVENUE FROM CONTRACTS WITH CUSTOMERS
Total non-interest income	4,602	4,478	13,187	12,100
Products and services transferred over time \| Within the scope of ASC 606
REVENUE FROM CONTRACTS WITH CUSTOMERS
Total non-interest income	4,155	3,736	13,092	11,407
Trust management fees \| Within the scope of ASC 606
REVENUE FROM CONTRACTS WITH CUSTOMERS
Total non-interest income	3,747	3,397	11,554	10,721
Financial services fees \| Within the scope of ASC 606
REVENUE FROM CONTRACTS WITH CUSTOMERS
Total non-interest income	439	506	1,324	1,361
Interchange fees \| Within the scope of ASC 606
REVENUE FROM CONTRACTS WITH CUSTOMERS
Total non-interest income	2,173	2,202	6,112	5,973
Customer deposit fees \| Within the scope of ASC 606
REVENUE FROM CONTRACTS WITH CUSTOMERS
Total non-interest income	1,971	1,751	5,615	4,598
Other customer service fees \| Within the scope of ASC 606
REVENUE FROM CONTRACTS WITH CUSTOMERS
Total non-interest income	$ 427	$ 358	$ 1,674	$ 854