LEASES - Schedule of Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Components of lease expense:
Operating lease cost (resulting from lease payments)	$ 10,225	$ 10,674
Supplemental cash flow information related to leases:
Operating cash flows from operating leases	11,120	11,470
ROU assets obtained in exchange for lease liabilities	1,402	703
Supplemental balance sheet information related to leases:
Operating lease ROU assets	$ 37,706	$ 40,362
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Operating lease liabilities	$ 44,503	$ 48,058
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Accrued interest payable and other liabilities	Accrued interest payable and other liabilities
Weighted average remaining lease term of operating leases	4 years 10 months 24 days	5 years 7 months 6 days
Weighted average discount rate of operating leases	3.83%	3.61%
Revere Bank and RPJ
Supplemental cash flow information related to leases:
ROU assets obtained in exchange for lease liabilities	$ 0	$ 0