Mortgage-Backed Securities - Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Investments [Line Items]
Unrealized (loss) gain on investments, net	$ (41,977)	$ 488	$ (112,001)	$ 57,609
Residential Mortgage Backed Securities [Member] | Agency MBS
Investments [Line Items]
Unrealized loss on debt securities	(43,705)	1,254	(113,381)	57,033
Commercial Mortgage Backed Securities [Member] | Agency MBS
Investments [Line Items]
Unrealized loss on debt securities	1,263	(275)	1,073	(37)
Interest-Only-Strip [Member]
Investments [Line Items]
Unrealized loss on debt securities	351	(466)	157	626
Asset-backed Securities, Securitized Loans and Receivables
Investments [Line Items]
Unrealized gain (loss) on other investments	$ 114	$ (25)	$ 150	$ (13)