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Investments in RMBS, Summary (Details)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2025
USD ($)
Security
Dec. 31, 2024
USD ($)
Security
Residential Mortgage-Backed Securities [Abstract]    
Carrying value $ 1,152,443 $ 1,122,420
RMBS [Member]    
Residential Mortgage-Backed Securities [Abstract]    
Original face value 1,328,685 1,302,160
Book value 1,143,913 1,139,262
Gross unrealized gains 15,113 5,496
Gross unrealized losses (6,583) (22,338)
Carrying value [1] $ 1,152,443 $ 1,122,420
Number of securities | Security 99 95
Weighted average coupon 4.97% 4.80%
Weighted average yield [2] 5.08% 4.91%
Weighted average maturity 28 years 28 years
Fannie Mae [Member] | Fair Value through OCI [Member]    
Residential Mortgage-Backed Securities [Abstract]    
Original face value $ 150,782 $ 160,092
Book value 117,473 131,441
Gross unrealized gains 1,705 492
Gross unrealized losses (877) (2,282)
Carrying value [1],[3] $ 118,301 $ 129,651
Number of securities | Security 10 11
Weighted average coupon 4.68% 4.62%
Weighted average yield [2] 4.84% 4.79%
Weighted average maturity 27 years 27 years
Fannie Mae [Member] | Fair Value through Earnings [Member]    
Residential Mortgage-Backed Securities [Abstract]    
Original face value $ 404,885 $ 335,927
Book value 359,318 299,453
Gross unrealized gains 5,009 1,870
Gross unrealized losses (1,556) (5,375)
Carrying value [1],[3] $ 362,771 $ 295,948
Number of securities | Security 29 24
Weighted average coupon 5.02% 4.81%
Weighted average yield [2] 5.14% 4.94%
Weighted average maturity 28 years 28 years
Freddie Mac [Member] | Fair Value through OCI [Member]    
Residential Mortgage-Backed Securities [Abstract]    
Original face value $ 125,240 $ 157,618
Book value 98,000 127,839
Gross unrealized gains 512 0
Gross unrealized losses (1,407) (5,362)
Carrying value [1],[3] $ 97,105 $ 122,477
Number of securities | Security 10 12
Weighted average coupon 4.68% 4.34%
Weighted average yield [2] 4.76% 4.44%
Weighted average maturity 27 years 27 years
Freddie Mac [Member] | Fair Value through Earnings [Member]    
Residential Mortgage-Backed Securities [Abstract]    
Original face value $ 647,778 $ 648,523
Book value 569,122 580,529
Gross unrealized gains 7,887 3,134
Gross unrealized losses (2,743) (9,319)
Carrying value [1],[3] $ 574,266 $ 574,344
Number of securities | Security 50 48
Weighted average coupon 5.05% 4.93%
Weighted average yield [2] 5.15% 5.03%
Weighted average maturity 28 years 28 years
[1] See Note 9 regarding the estimation of fair value, which approximates carrying value for all securities.
[2] The weighted average yield is based on the most recent gross monthly interest income, which is then annualized and divided by the book value of settled securities.
[3] The Company used an implied AAA rating for the Agency RMBS.