Mortgage-Backed Securities - Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Investments [Line Items]
Unrealized gain (loss) on investments, net	$ 33,652	$ (41,977)	$ 143,649	$ (112,001)
Residential Mortgage Backed Securities [Member] | Agency MBS
Investments [Line Items]
Unrealized loss on debt securities	29,102	(43,705)	138,362	(113,381)
Commercial Mortgage Backed Securities [Member] | Agency MBS
Investments [Line Items]
Unrealized loss on debt securities	4,266	1,263	4,376	1,073
Interest-Only-Strip [Member]
Investments [Line Items]
Unrealized loss on debt securities	315	351	924	157
Asset-backed Securities, Securitized Loans and Receivables
Investments [Line Items]
Unrealized gain (loss) on other investments	$ (31)	$ 114	$ (13)	$ 150