Securities, at Fair Value - Composition of Agency MBS Portfolio (Details) - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Fair Value	[1]	$ 863,289	$ 746,090
$5.00% Coupon
Debt Securities, Available-for-sale [Line Items]
Coupon rate (in percent)		5.00%	5.00%
Current Face		$ 73,941	$ 76,360
Weighted Average Purchase Price (in percent)		100.20%	100.20%
Weighted Average Market Price (in percent)		96.90%	99.10%
Fair Value		$ 71,671	$ 75,650
Weighted Average Loan Age (Months)		15 months	9 months
CPR (in percent)		7.50%	2.40%
5.50% Coupon
Debt Securities, Available-for-sale [Line Items]
Coupon rate (in percent)		5.50%	5.50%
Current Face		$ 267,221	$ 277,885
Weighted Average Purchase Price (in percent)		100.40%	100.40%
Weighted Average Market Price (in percent)		98.90%	100.70%
Fair Value		$ 264,251	$ 279,851
Weighted Average Loan Age (Months)		17 months	11 months
CPR (in percent)		8.60%	5.20%
6.00% Coupon
Debt Securities, Available-for-sale [Line Items]
Coupon rate (in percent)		6.00%	6.00%
Current Face		$ 332,320	$ 177,842
Weighted Average Purchase Price (in percent)		100.10%	100.00%
Weighted Average Market Price (in percent)		100.60%	101.70%
Fair Value		$ 334,221	$ 180,841
Weighted Average Loan Age (Months)		8 months	7 months
CPR (in percent)		10.60%	4.20%
6.50% Coupon
Debt Securities, Available-for-sale [Line Items]
Coupon rate (in percent)		6.50%	6.50%
Current Face		$ 30,473	$ 22,213
Weighted Average Purchase Price (in percent)		100.40%	100.10%
Weighted Average Market Price (in percent)		102.30%	102.70%
Fair Value		$ 31,170	$ 22,802
Weighted Average Loan Age (Months)		9 months	4 months
CPR (in percent)		11.30%	1.40%
Agency MBS
Debt Securities, Available-for-sale [Line Items]
Current Face		$ 703,955	$ 554,300
Weighted Average Purchase Price (in percent)		100.30%	100.30%
Weighted Average Market Price (in percent)		99.60%	100.90%
Fair Value		$ 701,313	$ 559,144
Weighted Average Loan Age (Months)		12 months	9 months
CPR (in percent)		9.60%	4.30%

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