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Securities, at Fair Value - Composition of Agency MBS Portfolio (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Fair Value	[1]	$ 504,639	$ 333,364
5.00% Coupon
Debt Securities, Available-for-sale [Line Items]
Coupon rate (percent)		5.00%
Principal/ Current Face		$ 79,295
Weighted Average Purchase Price		100.20%
Weighted Average Market Price		99.80%
Fair Value		$ 79,171
Weighted Average Loan Age (Months)		0 years
5.50% Coupon
Debt Securities, Available-for-sale [Line Items]
Coupon rate (percent)		5.50%
Principal/ Current Face		$ 220,213
Weighted Average Purchase Price		100.50%
Weighted Average Market Price		101.10%
Fair Value		$ 222,669
Weighted Average Loan Age (Months)		3 months
Agency MBS
Debt Securities, Available-for-sale [Line Items]
Principal/ Current Face		$ 299,508	131,165
Weighted Average Purchase Price		100.40%
Weighted Average Market Price		100.80%
Fair Value		$ 301,840	$ 131,700
Weighted Average Loan Age (Months)		2 months
[1] See Note 6 for information regarding the Company’s pledged assets.

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