Mortgage-Backed Securities - Gross Unrealized Losses (Details) $ in Thousands	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Investments [Line Items]
Allowance for credit loss	$ 0	$ 0
Agency MBS
Investments [Line Items]
Fair value, Less than 12 Months	1,447	920
Gross Unrealized Losses, Less than 12 Month	$ (6)	$ (3)
Number of Securities, Less than 12 Months	2	3
Fair value, 12 Months or Longer	$ 768,613	$ 814,443
Gross Unrealized Losses, 12 Months or Longer	$ (156,190)	$ (175,497)
Number of Securities, 12 Months or Longer	59	65
Non-Agency MBS
Investments [Line Items]
Fair value, Less than 12 Months	$ 735	$ 823
Gross Unrealized Losses, Less than 12 Month	$ (56)	$ (73)
Number of Securities, Less than 12 Months	3	2
Fair value, 12 Months or Longer	$ 4,896	$ 6,097
Gross Unrealized Losses, 12 Months or Longer	$ (133)	$ (200)
Number of Securities, 12 Months or Longer	8	10