FAIR VALUE OF FINANCIAL INSTRUMENTS - Reconciliation of Assets Measured at Fair Value on a Recurring Basis, Significant Unobservable Inputs (Details) - Residential PACE Assessments - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance of recurring Level 3 assets at January 1	$ 53,303	$ 0
Amortization included in interest income	261	0
Change in unrealized holding gains/losses included in other comprehensive income	536	0
Purchases	34,879	0
Sales	(6,284)	0
Principal paydowns	$ (437)	0
Balance of recurring Level 3 assets at March 31		$ 0