Investments in RMBS, Summary (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2023 USD ($) Security	Dec. 31, 2022 USD ($) Security
Residential Mortgage-Backed Securities [Abstract]
Carrying value		$ 1,012,130	$ 931,431
RMBS [Member]
Residential Mortgage-Backed Securities [Abstract]
Original face value		1,097,720	1,051,613
Book value		1,004,803	960,418
Gross unrealized gains		16,166	4,227
Gross unrealized losses		(8,839)	(33,214)
Carrying value	[1]	$ 1,012,130	$ 931,431
Number of securities | Security		80	83
Weighted average coupon		4.64%	4.23%
Weighted average yield	[2]	4.77%	4.29%
Weighted average maturity		28 years	29 years
Fannie Mae [Member] | Fair Value through OCI [Member]
Residential Mortgage-Backed Securities [Abstract]
Original face value		$ 211,773	$ 550,740
Book value		187,746	497,038
Gross unrealized gains		2,970	2,843
Gross unrealized losses		(1,607)	(16,484)
Carrying value	[1],[3]	$ 189,109	$ 483,397
Number of securities | Security		15	45
Weighted average coupon		4.55%	4.27%
Weighted average yield	[2]	4.70%	4.34%
Weighted average maturity		28 years	29 years
Fannie Mae [Member] | Fair Value through Earnings [Member]
Residential Mortgage-Backed Securities [Abstract]
Original face value		$ 221,965
Book value		208,487
Gross unrealized gains		4,606
Gross unrealized losses		(1,076)
Carrying value	[1],[3]	$ 212,017
Number of securities | Security		17
Weighted average coupon		4.78%
Weighted average yield	[2]	4.94%
Weighted average maturity		28 years
Freddie Mac [Member] | Fair Value through OCI [Member]
Residential Mortgage-Backed Securities [Abstract]
Original face value		$ 262,695	$ 500,873
Book value		235,260	463,380
Gross unrealized gains		1,075	1,384
Gross unrealized losses		(4,865)	(16,730)
Carrying value	[1],[3]	$ 231,470	$ 448,034
Number of securities | Security		19	38
Weighted average coupon		4.45%	4.18%
Weighted average yield	[2]	4.50%	4.24%
Weighted average maturity		28 years	29 years
Freddie Mac [Member] | Fair Value through Earnings [Member]
Residential Mortgage-Backed Securities [Abstract]
Original face value		$ 401,287
Book value		373,310
Gross unrealized gains		7,515
Gross unrealized losses		(1,291)
Carrying value	[1],[3]	$ 379,534
Number of securities | Security		29
Weighted average coupon		4.72%
Weighted average yield	[2]	4.88%
Weighted average maturity		29 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.