DERIVATIVE INSTRUMENTS - Summary of Characteristics of TBA Derivatives (Details) - TBA derivatives - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Derivative [Line Items]
Notional		$ 503,000
Notional	$ 3,117,000
Implied Cost Basis	3,158,058	(555,221)
Implied Market Value	3,136,154	(573,602)
Net Carrying Value	(21,904)	(18,381)
Purchase contracts
Derivative [Line Items]
Notional	4,237,000	988,000
Implied Cost Basis	4,239,001	920,626
Implied Market Value	4,209,341	915,790
Net Carrying Value	(29,660)	(4,836)
Sale contracts
Derivative [Line Items]
Notional	1,120,000	1,491,000
Implied Cost Basis	(1,080,943)	(1,475,847)
Implied Market Value	(1,073,187)	(1,489,392)
Net Carrying Value	$ 7,756	$ (13,545)