Equity (Narrative) (Details) - USD ($)			1 Months Ended	12 Months Ended
		Dec. 14, 2023	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Mar. 21, 2023	Jun. 13, 2018
Subsidiary, Sale of Stock [Line Items]
Preferred Stock, Shares Issued			14,757,222	14,757,222	9,420,421
Proceeds from Issuance of Preferred Stock and Preference Stock	[1]			$ 96,850,000	$ 511,000	$ 116,220,000
Preferred Stock, Shares Authorized			100,000,000	100,000,000	100,000,000
Preferred Stock, Par or Stated Value Per Share			$ 0.001	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)			200,000,000	200,000,000	100,000,000
Common Stock, Par or Stated Value Per Share			$ 0.001	$ 0.001	$ 0.001
Dividends declared (in usd per share)				$ 1.80	$ 1.80	$ 1.64
Dividends paid				$ (149,271,000)	$ (123,065,000)	$ (85,704,000)
Common shares issued and outstanding upon conversion of all convertible securities (in shares)			83,795,803	83,795,803	64,628,148
Number of shares authorized to be repurchased (in shares)								1,550,000
Preferred Stock, Shares Outstanding			14,757,222	14,757,222	9,420,421
Shares repurchased				(1,084,336)	(128,184)	0
Average price per share (USD per share)				$ 11.39	$ 12.94
Total cost				$ (12,352,000)	$ (1,659,000)
Incentive Fee, Loss Carryforward			$ 22,100,000	22,100,000	$ 85,000,000
Stock Repurchase Program, Authorized Amount			$ 45,800,000	$ 45,800,000			$ 50,000,000
Stock Issued During Period, Shares, New Issues				20,181,690	6,459,070	13,602,900
Common stock, shares issued			83,000,488	83,000,488	63,812,215
Arlington Asset Investment Corp.
Subsidiary, Sale of Stock [Line Items]
Common stock, shares issued		11,040,704
Preferred ATM Program
Subsidiary, Sale of Stock [Line Items]
Maximum shares available to be issued under at the market program				100,000,000
Commissions and offering costs					$ 23,000
Proceeds from issuance of shares, net					$ 500,000
Stock Issued During Period, Shares, New Issues					20,421
Common ATM Program
Subsidiary, Sale of Stock [Line Items]
Maximum shares available to be issued under at the market program				10,000,000
Commissions and offering costs				$ 400,000	$ 1,300,000
Proceeds from issuance of shares, net					$ 99,200,000	$ 28,200,000
Stock Issued During Period, Shares, New Issues					6,459,070	1,549,900
2023 Common ATM Program
Subsidiary, Sale of Stock [Line Items]
Maximum shares available to be issued under at the market program				225,000,000
Commissions and offering costs				$ 1,400,000
Proceeds from issuance of shares, net				$ 122,100,000
Stock Issued During Period, Shares, New Issues				9,140,986
Series C Preferred Stock
Subsidiary, Sale of Stock [Line Items]
Commissions and offering costs				$ 3,500,000
Proceeds from issuance of shares, net				$ 96,500,000
Series A Preferred Stock
Subsidiary, Sale of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage				6.75%
Preferred Stock, Par or Stated Value Per Share			$ 0.001	$ 0.001
Preferred Stock, Liquidation Preference Per Share			$ 25.00	$ 25.00
Preferred Stock Dividend Rate Variable Rate Spread				5.196%
Preferred Stock, Amount of Preferred Dividends in Arrears				$ 4,000,000	$ 2,500,000
Preferred Stock, Shares Outstanding			4,600,000	4,600,000	4,600,000
Series B Preferred Stock
Subsidiary, Sale of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage				6.25%
Preferred Stock, Par or Stated Value Per Share			$ 0.001	$ 0.001
Preferred Stock, Liquidation Preference Per Share			$ 25.00	$ 25.00
Preferred Stock Dividend Rate Variable Rate Spread				4.99%
Preferred Stock, Shares Outstanding			4,820,421	4,820,421	4,820,421
Series B Preferred Stock | Arlington Asset Investment Corp.
Subsidiary, Sale of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage			7.00%
Preferred Stock, Par or Stated Value Per Share		$ 0.01
Series C Preferred Stock
Subsidiary, Sale of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage				8.625%
Preferred Stock, Par or Stated Value Per Share			$ 0.001	$ 0.001
Preferred Stock, Liquidation Preference Per Share			$ 25.00	$ 25.00
Preferred Stock Dividend Rate Variable Rate Spread				5.13%
Preferred Stock, Shares Outstanding			4,000,000	4,000,000
Series C Preferred Stock | Arlington Asset Investment Corp.
Subsidiary, Sale of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage		8.25%
Preferred Stock, Par or Stated Value Per Share		$ 0.01
Series E Preferred Stock
Subsidiary, Sale of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage				8.25%
Preferred Stock, Par or Stated Value Per Share			$ 0.01	$ 0.01
Preferred Stock, Liquidation Preference Per Share			$ 25.00	$ 25.00
Preferred Stock Dividend Rate Variable Rate Spread				5.664%
Preferred Stock, Shares Outstanding			957,133	957,133
Series D Preferred Stock
Subsidiary, Sale of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage				7.00%
Preferred Stock, Par or Stated Value Per Share			$ 0.01	$ 0.01
Preferred Stock, Liquidation Preference Per Share			$ 25.00	$ 25.00
Preferred Stock, Shares Outstanding			379,668	379,668
Operating Partnership Units [Member]
Subsidiary, Sale of Stock [Line Items]
Stock issued during period, shares, conversion of units				90,919	4,066	5,710

[1] Net of discounts and commissions.