SECURED FINANCING - Summary of Gross Amounts, Amounts Offset and Net Amounts of Repurchase Agreement and Reverse Repurchase Agreement (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Reverse Repurchase Agreements
Gross amounts	$ 0	$ 0
Amounts offset	0	0
Netted amounts	0	0
Repurchase Agreements
Gross amounts	52,626,503	54,769,643
Amounts offset	0	0
Netted amounts	$ 52,626,503	$ 54,769,643	[1]

[1] (1)Derived from the audited consolidated financial statements at December 31, 2021.