Mortgage-Backed Securities - Realize Gain (Loss) on Investments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Investments [Line Items]
Realized losses on sales of MBS - FVO	$ 0	$ 0	$ (1,506)	$ (74,916)
Realized loss on sales of investments, net	$ 0	$ 0	$ (1,506)	$ (74,916)