Securities, at Fair Value - Composition of Agency MBS Portfolio (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Fair Value	[1]	$ 594,294	$ 333,364
5.00% Coupon
Debt Securities, Available-for-sale [Line Items]
Coupon rate (percent)		5.00%
Principal/ Current Face		$ 77,662
Weighted Average Purchase Price		100.20%
Weighted Average Market Price		98.00%
Fair Value		$ 76,147
Weighted Average Loan Age (Months)		3 months
CPR		6.00%
5.50% Coupon
Debt Securities, Available-for-sale [Line Items]
Coupon rate (percent)		5.50%
Principal/ Current Face		$ 290,178
Weighted Average Purchase Price		100.40%
Weighted Average Market Price		99.70%
Fair Value		$ 289,196
Weighted Average Loan Age (Months)		5 months
CPR		8.60%
6.00% Coupon
Debt Securities, Available-for-sale [Line Items]
Coupon rate (percent)		6.00%
Principal/ Current Face		$ 30,629
Weighted Average Purchase Price		100.80%
Weighted Average Market Price		101.00%
Fair Value		$ 30,948
Weighted Average Loan Age (Months)		0 months
CPR		0.00%
Agency MBS
Debt Securities, Available-for-sale [Line Items]
Principal/ Current Face		$ 398,469	131,165
Weighted Average Purchase Price		100.40%
Weighted Average Market Price		99.50%
Fair Value		$ 396,291	$ 131,700
Weighted Average Loan Age (Months)		4 months
CPR		8.00%

[1] See Note 6 for information regarding the Company’s pledged assets.