Mortgage-Backed Securities - Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Gross unrealized loss	$ 145,289	$ 162,519
Agency MBS
Debt Securities, Available-for-sale [Line Items]
Gross unrealized loss	18	3,000
Non-Agency RMBS
Debt Securities, Available-for-sale [Line Items]
Gross unrealized loss	$ 19,000	$ 20,000