LEASES - Schedule of Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Components of lease expense:
Operating lease cost (resulting from lease payments)	$ 10,924	$ 12,304
Supplemental cash flow information related to leases:
Operating cash flows from operating leases	11,579	12,930
ROU assets obtained in exchange for lease liabilities	92	803
Supplemental balance sheet information related to leases:
Operating lease ROU assets	48,910	57,872
Operating lease liabilities	$ 57,402	$ 67,138
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	8 years 7 months 6 days	9 years
Weighted average discount rate of operating leases	3.02%	2.92%
Revere Bank and RPJ
Supplemental cash flow information related to leases:
ROU assets obtained in exchange for lease liabilities	$ 0	$ 0