SECURED FINANCING - Summary of Gross Amounts, Amounts Offset and Net Amounts of Repurchase Agreement and Reverse Repurchase Agreement (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Reverse Repurchase Agreements
Gross amounts	$ 4,515,504	$ 2,613,088
Amounts offset	(4,480,500)	(2,613,088)
Netted amounts	35,004	0
Repurchase Agreements
Gross amounts	79,599,463	68,302,011
Amounts offset	(4,480,500)	(2,613,088)
Netted amounts	$ 75,118,963	$ 65,688,923	[1]

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