Securities, at Fair Value - Residential Mortgage Securities (Details) - USD ($) $ in Thousands		Jun. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Fair Value	[1]	$ 594,294	$ 333,364
Agency MBS
Debt Securities, Available-for-sale [Line Items]
Principal/ Current Face		398,469	131,165
Purchase Premiums		1,723	860
Accretable Purchase Discounts		(67)	0
Discount Designated as Credit Reserve		0	0
Gross Amortized Cost		400,125	132,025
Gross Unrealized Gains		64	0
Gross Unrealized Losses		(3,898)	(325)
Net Unrealized Gain/(Loss)		(3,834)	(325)
Fair Value		396,291	131,700
Other Securities
Debt Securities, Available-for-sale [Line Items]
Principal/ Current Face		214,358	215,649
Purchase Premiums		20,815	18,344
Accretable Purchase Discounts		(5,934)	(6,272)
Discount Designated as Credit Reserve		(46,330)	(46,332)
Gross Amortized Cost		182,909	181,389
Gross Unrealized Gains		15,864	21,473
Gross Unrealized Losses		(770)	(1,198)
Net Unrealized Gain/(Loss)		15,094	20,275
Fair Value		198,003	201,664
Total residential mortgage securities
Debt Securities, Available-for-sale [Line Items]
Principal/ Current Face		612,827	346,814
Purchase Premiums		22,538	19,204
Accretable Purchase Discounts		(6,001)	(6,272)
Discount Designated as Credit Reserve		(46,330)	(46,332)
Gross Amortized Cost		583,034	313,414
Gross Unrealized Gains		15,928	21,473
Gross Unrealized Losses		(4,668)	(1,523)
Net Unrealized Gain/(Loss)		11,260	19,950
Fair Value		594,294	333,364
CRT, Fair Value Option
Debt Securities, Available-for-sale [Line Items]
Gross Unrealized Gains		1,500	131
Gross Unrealized Losses		0	(1,200)
Fair Value		50,900	48,600
Non-Agency MBS
Debt Securities, Available-for-sale [Line Items]
Gross Unrealized Gains		275	0
Gross Unrealized Losses		(82)	0
Fair Value		$ 24,300	$ 24,600

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