LEASES - Schedule of Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Components of lease expense:
Operating lease cost (resulting from lease payments)	$ 10,674	$ 10,924
Supplemental cash flow information related to leases:
Operating cash flows from operating leases	11,470	11,579
ROU assets obtained in exchange for lease liabilities	703	92
Supplemental balance sheet information related to leases:
Operating lease ROU assets	40,362	48,910
Operating lease liabilities	$ 48,058	$ 57,402
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
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	5 years 7 months 6 days	8 years 7 months 6 days
Weighted average discount rate of operating leases	3.61%	3.02%
Revere Bank and RPJ
Supplemental cash flow information related to leases:
ROU assets obtained in exchange for lease liabilities	$ 0	$ 0