Equity Offerings, Offering Expenses, and Distributions - Preferred Stock Narrative (Details) $ / shares in Units, $ in Thousands							1 Months Ended	3 Months Ended		12 Months Ended
	Nov. 09, 2022 $ / shares	Jun. 09, 2022 $ / shares shares	Jul. 12, 2021 USD ($) number_of_month $ / shares shares	May 26, 2021 $ / shares	Oct. 30, 2020 $ / shares	Aug. 03, 2020 number_of_month $ / shares shares	Nov. 03, 2022 USD ($)	Sep. 30, 2022 USD ($) $ / shares shares	Sep. 30, 2021 USD ($) shares	Jun. 30, 2022 USD ($) $ / shares shares	Dec. 01, 2022 $ / shares	Nov. 01, 2022 $ / shares	Feb. 18, 2022 shares	Feb. 17, 2022 shares	Jul. 15, 2021 shares	Jun. 30, 2021 $ / shares	May 19, 2021 shares
Class of Stock [Line Items]
Temporary equity, shares authorized (in shares) | shares								227,900,000		227,900,000
Temporary equity, par value (usd per share)								$ 0.001		$ 0.001
Temporary equity, liquidation preference (usd per share)								25.00		$ 25.00
Involuntary Liquidating Preference per Unit (usd per share)								$ 25
Common stock, consecutive trading days, volume weighted average price								5 days
Redemption eligibility term								5 years
Shares issued (in shares) | shares									9,120,074
Dividends payable | $								$ 23,836		$ 23,657
Subsequent Event
Class of Stock [Line Items]
Proceeds from issuance of preferred stock | $							$ 147,363
5.50% Preferred Stock
Class of Stock [Line Items]
Temporary equity, shares authorized (in shares) | shares		60,000,000											10,000,000
Temporary equity, par value (usd per share)		$ 0.001
Temporary equity, liquidation preference (usd per share)		$ 25.00						$ 25		$ 25
Dividend rate		5.50%						5.50%		5.50%
Preferred stock, par value (usd per share)					$ 0.001
Involuntary Liquidating Preference per Unit (usd per share)					$ 25.00	$ 25.00										$ 25
Dividend rate			5.50%	5.50%		5.50%		5.50%	5.50%
Share price (usd per share)								$ 25.00
Redemption price rate								100.00%
Calculated interest basis, days						360 days
Calculated interest basis, number of months | number_of_month						12
Calculated interest basis, days in month						30 days
Payments of dividends | $								$ 10,753	$ 2,407
Dividends payable | $								$ 24
5.50% Preferred Stock | Subsequent Event
Class of Stock [Line Items]
Temporary equity, liquidation preference (usd per share)	$ 25
Dividend rate	5.50%
5.50% Preferred Stock | Dividend Declared | Subsequent Event
Class of Stock [Line Items]
Dividends payable (usd per share)											$ 0.114583	$ 0.114583
5.50% Series A1 Preferred Stock
Class of Stock [Line Items]
Temporary equity, shares authorized (in shares) | shares								60,000,000		60,000,000
Dividend rate		5.50%
Share price (usd per share)								$ 25.00
Shares issued (in shares) | shares									2,946,568
Proceeds from issuance of preferred stock | $								$ 228,539
5.50% Series M1 Preferred Stock
Class of Stock [Line Items]
Temporary equity, shares authorized (in shares) | shares								60,000,000		60,000,000
Dividend rate		5.50%
Shares issued (in shares) | shares									173,506
Proceeds from issuance of preferred stock | $								$ 33,086
5.50% Series AA1 Preferred Stock
Class of Stock [Line Items]
Temporary equity, shares authorized (in shares) | shares								10,000,000		10,000,000
Dividend rate					5.50%
Share price (usd per share)								$ 25.00
5.50% Series MM1 Preferred Stock
Class of Stock [Line Items]
Temporary equity, shares authorized (in shares) | shares								10,000,000		10,000,000
Dividend rate					5.50%
5.50% Series A2 Preferred Stock
Class of Stock [Line Items]
Temporary equity, shares authorized (in shares) | shares								187,000		187,000
Preferred stock, shares authorized (in shares) | shares																	187,000
Preferred stock, par value (usd per share)				$ 0.001
Involuntary Liquidating Preference per Unit (usd per share)				$ 25.00
Dividend rate				5.50%
Share price (usd per share)								$ 25.00
Shares issued (in shares) | shares									0
Convertible Preferred Stock
Class of Stock [Line Items]
Authorized and unissued shares of common stock reclassified into shares of preferred stock (in shares) | shares		60,000,000				120,000,000								40,000,000			1,000,000
5.35% Preferred Stock
Class of Stock [Line Items]
Temporary equity, liquidation preference (usd per share)								$ 25		$ 25
Preferred stock, shares authorized (in shares) | shares			6,000,000
Preferred stock, par value (usd per share)			$ 0.001
Dividend rate			5.35%
Authorized and unissued shares of common stock reclassified into shares of preferred stock (in shares) | shares															6,900,000
Share price (usd per share)			$ 25.00
Preferred stock, liquidation value | $			$ 150,000
Overallotment purchase option term			30 days
Change of control triggering event threshold			120 days
Preferred stock, conversion ratio			6.03865
Calculated interest basis, days			360 days
Calculated interest basis, number of months | number_of_month			12
Calculated interest basis, days in month			30 days
Payments of dividends | $								$ 2,006
Dividends payable | $								$ 1,315
5.35% Preferred Stock | Subsequent Event
Class of Stock [Line Items]
Temporary equity, liquidation preference (usd per share)	$ 25.00
Dividend rate	5.35%
5.35% Preferred Stock | Dividend Declared | Subsequent Event
Class of Stock [Line Items]
Dividends payable (usd per share)												$ 0.334375
5.35% Preferred Stock | Over-Allotment Option
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares) | shares			900,000
Preferred Stock DRIP
Class of Stock [Line Items]
Dividend rate						5.50%