Equity - Narrative (Details)		3 Months Ended				9 Months Ended		43 Months Ended	60 Months Ended	89 Months Ended
	Feb. 22, 2021 USD ($)	Sep. 30, 2024 USD ($) period $ / shares shares	Sep. 30, 2023 USD ($) shares	Jun. 30, 2023 USD ($) shares	Mar. 31, 2023 USD ($) shares	Sep. 30, 2024 USD ($) director period $ / shares shares	Sep. 30, 2023 USD ($) shares	Sep. 30, 2024 USD ($) period $ / shares shares	Sep. 17, 2024	Sep. 30, 2024 USD ($) period $ / shares shares	Mar. 26, 2024 USD ($)	Dec. 31, 2023 shares	May 04, 2023 USD ($)	Aug. 03, 2022 USD ($)	May 05, 2017 USD ($)
Class of Stock [Line Items]
Securities and capital available for issuance | $											$ 1,000,000,000
Capital available for issuance, effective period											3 years
Preferred shares authorized (in shares)		50,000,000				50,000,000		50,000,000		50,000,000
Preferred stock, par value (in dollars per share) | $ / shares		$ 0.01				$ 0.01		$ 0.01		$ 0.01
Preferred stock, shares outstanding (in shares)		9,120,000				9,120,000		9,120,000		9,120,000
Quarterly periods required to grant preferred stock voting rights | period		6				6		6		6
Number of directors | director						2
Percent of votes needed to pass		66.67%				66.67%		66.67%		66.67%
Sale Agents
Class of Stock [Line Items]
Amount authorized | $															$ 100,000,000
Net proceeds from issuance of stock (in shares)		0	0			0	0			2,200,000
Net proceeds from issuance of common stock | $										$ 48,300,000
2022 Repurchase Program
Class of Stock [Line Items]
Authorized amount for stock repurchase | $														$ 15,000,000
Value of common stock remained authorized for future share repurchases | $		$ 1,500,000	$ 1,461,810	$ 1,461,810	$ 2,569,940	$ 1,500,000	$ 1,461,810	$ 1,500,000		1,500,000
Shares repurchased (in shares)		0		187,020	923,261	0	1,110,281
2023 Repurchase Program
Class of Stock [Line Items]
Authorized amount for stock repurchase | $													$ 15,000,000
Value of common stock remained authorized for future share repurchases | $		$ 15,000,000				$ 15,000,000		$ 15,000,000		$ 15,000,000
Preferred Repurchase Program
Class of Stock [Line Items]
Authorized amount for stock repurchase | $	$ 20,000,000
Shares repurchased (in shares)								0
8.25% Series A Cumulative Redeemable Preferred Stock
Class of Stock [Line Items]
Preferred stock dividend percentage	8.25%	8.25%				8.25%
Preferred stock, shares issued (in shares)		1,700,000				1,700,000		1,700,000		1,700,000		1,700,000
Preferred stock, shares outstanding (in shares)		1,663,000				1,663,000		1,663,000		1,663,000		1,700,000
8.00% Series B Cumulative Redeemable Preferred Stock
Class of Stock [Line Items]
Preferred stock dividend percentage	8.00%	8.00%				8.00%
Preferred stock, shares issued (in shares)		3,700,000				3,700,000		3,700,000		3,700,000		3,700,000
Preferred stock, shares outstanding (in shares)		3,728,000				3,728,000		3,728,000		3,728,000		3,700,000
8.000% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock
Class of Stock [Line Items]
Preferred stock dividend percentage	8.00%	8.00%				8.00%			8.00%
Preferred stock, shares issued (in shares)		3,700,000				3,700,000		3,700,000		3,700,000		3,700,000
Preferred stock, shares outstanding (in shares)		3,729,000				3,729,000		3,729,000		3,729,000		3,700,000