VARIABLE INTEREST ENTITIES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Variable Interest Entity [Line Items]
Securitized debt of consolidated VIEs	$ 21,802,193		$ 19,540,678	[1]
Costs incurred in connection with securitization	48,064	$ 38,570
Securitized debt of consolidated VIE, unrealized gain (loss)	(170,900)	86,000
Participations issued	1,748,273		1,154,816	[1]
Consolidated VIEs
Variable Interest Entity [Line Items]
Exposure to obligations of VIEs	2,500,000
Securitized debt of consolidated VIEs	21,800,000		19,500,000
Costs incurred in connection with securitization	6,800	$ 3,700
Contractual principal amount of debt held by third parties	22,500,000		20,500,000
Consolidated VIEs | Consolidation, Eliminations
Variable Interest Entity [Line Items]
Mortgage-backed securities	2,500,000		2,300,000
VIE, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Participations issued	$ 1,700,000		$ 1,200,000

[1] (1)Derived from the audited consolidated financial statements at December 31, 2024.