Mortgage-Backed Securities - Unrealized Loss Positions (Details) $ in Thousands	Mar. 31, 2025 USD ($) security	Dec. 31, 2024 USD ($) security
Debt Securities, Available-for-sale [Line Items]
Unrealized Loss Position for Less than 12 Months, Estimated Fair Value	$ 591,688	$ 507,036
Unrealized Loss Position for Less than 12 Months, Unrealized Losses	$ (5,354)	$ (7,035)
Unrealized Loss Position for Less than 12 Months, Number of Positions | security	36	45
Unrealized Loss Position for 12 Months or More, Estimated Fair Value	$ 279,906	$ 278,412
Unrealized Loss Position for 12 Months or More, Unrealized Losses	$ (124,509)	$ (135,032)
Unrealized Loss Position for 12 Months or More, Number of Positions | security	201	201
Total, Estimated Fair Value	$ 871,594	$ 785,448
Total, Unrealized Losses	$ (129,863)	$ (142,067)
Total, Number of Positions | security	237	246
Residential Mortgage-Backed Securities | Non-Agency RMBS - Senior
Debt Securities, Available-for-sale [Line Items]
Unrealized Loss Position for Less than 12 Months, Estimated Fair Value	$ 26,293	$ 65,051
Unrealized Loss Position for Less than 12 Months, Unrealized Losses	$ (589)	$ (757)
Unrealized Loss Position for Less than 12 Months, Number of Positions | security	5	13
Unrealized Loss Position for 12 Months or More, Estimated Fair Value	$ 33,595	$ 35,492
Unrealized Loss Position for 12 Months or More, Unrealized Losses	$ (4,914)	$ (5,010)
Unrealized Loss Position for 12 Months or More, Number of Positions | security	6	6
Total, Estimated Fair Value	$ 59,889	$ 100,544
Total, Unrealized Losses	$ (5,503)	$ (5,767)
Total, Number of Positions | security	11	19
Residential Mortgage-Backed Securities | Non-Agency RMBS - Subordinated
Debt Securities, Available-for-sale [Line Items]
Unrealized Loss Position for Less than 12 Months, Estimated Fair Value	$ 27,081	$ 27,799
Unrealized Loss Position for Less than 12 Months, Unrealized Losses	$ (1,202)	$ (1,135)
Unrealized Loss Position for Less than 12 Months, Number of Positions | security	6	7
Unrealized Loss Position for 12 Months or More, Estimated Fair Value	$ 168,468	$ 167,742
Unrealized Loss Position for 12 Months or More, Unrealized Losses	$ (24,941)	$ (26,766)
Unrealized Loss Position for 12 Months or More, Number of Positions | security	29	29
Total, Estimated Fair Value	$ 195,549	$ 195,541
Total, Unrealized Losses	$ (26,143)	$ (27,901)
Total, Number of Positions | security	35	36
Residential Mortgage-Backed Securities | Non-Agency RMBS - Interest-only
Debt Securities, Available-for-sale [Line Items]
Unrealized Loss Position for Less than 12 Months, Estimated Fair Value	$ 6,167	$ 6,061
Unrealized Loss Position for Less than 12 Months, Unrealized Losses	$ (388)	$ (1,118)
Unrealized Loss Position for Less than 12 Months, Number of Positions | security	8	12
Unrealized Loss Position for 12 Months or More, Estimated Fair Value	$ 42,135	$ 35,734
Unrealized Loss Position for 12 Months or More, Unrealized Losses	$ (84,378)	$ (92,282)
Unrealized Loss Position for 12 Months or More, Number of Positions | security	125	124
Total, Estimated Fair Value	$ 48,302	$ 41,795
Total, Unrealized Losses	$ (84,766)	$ (93,400)
Total, Number of Positions | security	133	136
Residential Mortgage-Backed Securities | Pass-through
Debt Securities, Available-for-sale [Line Items]
Unrealized Loss Position for Less than 12 Months, Estimated Fair Value	$ 149,497
Unrealized Loss Position for Less than 12 Months, Unrealized Losses	$ (731)
Unrealized Loss Position for Less than 12 Months, Number of Positions | security	5
Unrealized Loss Position for 12 Months or More, Estimated Fair Value	$ 0
Unrealized Loss Position for 12 Months or More, Unrealized Losses	$ 0
Unrealized Loss Position for 12 Months or More, Number of Positions | security	0
Total, Estimated Fair Value	$ 149,497
Total, Unrealized Losses	$ (731)
Total, Number of Positions | security	5
Residential Mortgage-Backed Securities | Agency RMBS - CMO
Debt Securities, Available-for-sale [Line Items]
Unrealized Loss Position for Less than 12 Months, Estimated Fair Value	$ 371,940	$ 399,502
Unrealized Loss Position for Less than 12 Months, Unrealized Losses	$ (1,423)	$ (2,972)
Unrealized Loss Position for Less than 12 Months, Number of Positions | security	6	7
Unrealized Loss Position for 12 Months or More, Estimated Fair Value	$ 0	$ 0
Unrealized Loss Position for 12 Months or More, Unrealized Losses	$ 0	$ 0
Unrealized Loss Position for 12 Months or More, Number of Positions | security	0	0
Total, Estimated Fair Value	$ 371,940	$ 399,502
Total, Unrealized Losses	$ (1,423)	$ (2,972)
Total, Number of Positions | security	6	7
Residential Mortgage-Backed Securities | Agency RMBS - Interest-only
Debt Securities, Available-for-sale [Line Items]
Unrealized Loss Position for Less than 12 Months, Estimated Fair Value	$ 5,427	$ 1,614
Unrealized Loss Position for Less than 12 Months, Unrealized Losses	$ (169)	$ (69)
Unrealized Loss Position for Less than 12 Months, Number of Positions | security	2	1
Unrealized Loss Position for 12 Months or More, Estimated Fair Value	$ 4,150	$ 8,269
Unrealized Loss Position for 12 Months or More, Unrealized Losses	$ (3,928)	$ (4,151)
Unrealized Loss Position for 12 Months or More, Number of Positions | security	6	7
Total, Estimated Fair Value	$ 9,576	$ 9,882
Total, Unrealized Losses	$ (4,097)	$ (4,220)
Total, Number of Positions | security	8	8
Commercial Mortgage Backed Securities | Agency CMBS - Project loans
Debt Securities, Available-for-sale [Line Items]
Unrealized Loss Position for Less than 12 Months, Estimated Fair Value	$ 5,283	$ 5,234
Unrealized Loss Position for Less than 12 Months, Unrealized Losses	$ (852)	$ (901)
Unrealized Loss Position for Less than 12 Months, Number of Positions | security	4	4
Unrealized Loss Position for 12 Months or More, Estimated Fair Value	$ 29,718	$ 29,136
Unrealized Loss Position for 12 Months or More, Unrealized Losses	$ (5,640)	$ (6,231)
Unrealized Loss Position for 12 Months or More, Number of Positions | security	32	32
Total, Estimated Fair Value	$ 35,001	$ 34,370
Total, Unrealized Losses	$ (6,492)	$ (7,132)
Total, Number of Positions | security	36	36
Commercial Mortgage Backed Securities | Agency CMBS - Interest-only
Debt Securities, Available-for-sale [Line Items]
Unrealized Loss Position for Less than 12 Months, Estimated Fair Value	$ 0	$ 1,775
Unrealized Loss Position for Less than 12 Months, Unrealized Losses	$ 0	$ (83)
Unrealized Loss Position for Less than 12 Months, Number of Positions | security	0	1
Unrealized Loss Position for 12 Months or More, Estimated Fair Value	$ 1,840	$ 2,039
Unrealized Loss Position for 12 Months or More, Unrealized Losses	$ (708)	$ (592)
Unrealized Loss Position for 12 Months or More, Number of Positions | security	3	3
Total, Estimated Fair Value	$ 1,840	$ 3,814
Total, Unrealized Losses	$ (708)	$ (675)
Total, Number of Positions | security	3	4