Mortgage-Backed Securities - Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Investments [Line Items]
Unrealized (loss) gain on investments, net	$ (142,352)	$ 142,501	$ (213,022)
Residential Mortgage Backed Securities [Member] | Agency MBS
Investments [Line Items]
Unrealized loss on debt securities	(144,139)	141,263	(208,129)
Commercial Mortgage Backed Securities [Member] | Agency MBS
Investments [Line Items]
Unrealized loss on debt securities	1,073	96	(1,169)
Interest-Only-Strip [Member]
Investments [Line Items]
Unrealized loss on debt securities	531	1,111	(3,924)
Asset-backed Securities, Securitized Loans and Receivables
Investments [Line Items]
Unrealized gain (loss) on other investments	$ 183	$ 31	$ 200