Mortgage-Backed Securities - Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Investments [Line Items]
Unrealized gain (loss) on investments, net	$ 109,997	$ (70,024)
Residential Mortgage Backed Securities [Member] | Agency MBS
Investments [Line Items]
Unrealized loss on debt securities	109,260	(69,676)
Commercial Mortgage Backed Securities [Member] | Agency MBS
Investments [Line Items]
Unrealized loss on debt securities	110	(190)
Interest-Only-Strip [Member]
Investments [Line Items]
Unrealized loss on debt securities	609	(194)
Asset-backed Securities, Securitized Loans and Receivables
Investments [Line Items]
Unrealized gain (loss) on other investments	$ 18	$ 36