Mortgage-Backed Securities - Gross Unrealized Losses (Details) $ in Thousands	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Investments [Line Items]
Allowance for credit loss	$ 0	$ 0
Agency MBS
Investments [Line Items]
Fair value, Less than 12 Months	6,309	3,926
Gross Unrealized Losses, Less than 12 Month	$ (263)	$ (149)
Number of Securities, Less than 12 Months	7	4
Fair value, 12 Months or Longer	$ 862,038	$ 932,682
Gross Unrealized Losses, 12 Months or Longer	$ (178,136)	$ (158,651)
Number of Securities, 12 Months or Longer	70	78
Non-Agency MBS
Investments [Line Items]
Fair value, Less than 12 Months	$ 164	$ 1,736
Gross Unrealized Losses, Less than 12 Month	$ (3)	$ (37)
Number of Securities, Less than 12 Months	1	8
Fair value, 12 Months or Longer	$ 11,397	$ 21,704
Gross Unrealized Losses, 12 Months or Longer	$ (512)	$ (989)
Number of Securities, 12 Months or Longer	24	41