Equity Offerings, Offering Expenses, and Distributions - Schedule of Preferred Stock Dividends (Details) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended
	Dec. 27, 2024	Jul. 12, 2021	Aug. 03, 2020	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2016
5.50% Preferred Stock
Class of Stock [Line Items]
Dividend rate			5.50%	5.50%	5.50%
Amount Distributed				$ 8,328	$ 9,519
5.50% Preferred Stock \| O 2027 M1 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods				$ 0.114583
Amount Distributed				$ 2,821
5.50% Preferred Stock \| O 2027 M2 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods				$ 0.114583
Amount Distributed				$ 2,779
5.50% Preferred Stock \| O 2027 M3 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods				$ 0.114583
Amount Distributed				$ 2,728
5.50% Preferred Stock \| O 2026 M1 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods					$ 0.114583
Amount Distributed					$ 3,196
5.50% Preferred Stock \| O 2026 M2 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods					$ 0.114583
Amount Distributed					$ 3,175
5.50% Preferred Stock \| O 2026 M3 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods					$ 0.114583
Amount Distributed					$ 3,148
6.50% Preferred Stock
Class of Stock [Line Items]
Dividend rate			6.50%	6.50%	6.50%
Amount Distributed				$ 9,849	$ 10,634
6.50% Preferred Stock \| O 2027 M1 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods				$ 0.135417
Amount Distributed				$ 3,306
6.50% Preferred Stock \| O 2027 M2 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods				$ 0.135417
Amount Distributed				$ 3,282
6.50% Preferred Stock \| O 2027 M3 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods				$ 0.135417
Amount Distributed				$ 3,261
6.50% Preferred Stock \| O 2026 M1 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods					$ 0.135417
Amount Distributed					$ 3,567
6.50% Preferred Stock \| O 2026 M2 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods					$ 0.135417
Amount Distributed					$ 3,543
6.50% Preferred Stock \| O 2026 M3 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods					$ 0.135417
Amount Distributed					$ 3,524
Floating Rate Preferred Stock Holders
Class of Stock [Line Items]
Amount Distributed				$ 3,522	$ 3,723
Floating Rate Preferred Stock Holders \| O 2027 M1 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods				$ 0.135417
Amount Distributed				$ 1,180
Floating Rate Preferred Stock Holders \| O 2027 M2 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods				$ 0.135417
Amount Distributed				$ 1,179
Floating Rate Preferred Stock Holders \| O 2027 M3 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods				$ 0.135417
Amount Distributed				$ 1,163
Floating Rate Preferred Stock Holders \| O 2026 M1 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods					$ 0.135417
Amount Distributed					$ 1,244
Floating Rate Preferred Stock Holders \| O 2026 M2 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods					$ 0.135417
Amount Distributed					$ 1,244
Floating Rate Preferred Stock Holders \| O 2026 M3 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods					$ 0.135417
Amount Distributed					$ 1,235
5.35% Preferred Stock
Class of Stock [Line Items]
Dividend rate		5.35%		5.35%		5.35%
Amount Distributed				$ 1,791	$ 1,756
5.35% Preferred Stock \| O 2027 Q1 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods				$ 0.334375
Amount Distributed				$ 1,791
5.35% Preferred Stock \| O 2026 Q1 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods					$ 0.334375
Amount Distributed					$ 1,756
7.50% Preferred Stock
Class of Stock [Line Items]
Dividend rate	7.50%		7.50%	7.50%
Amount Distributed				$ 2,621	$ 1,134
7.50% Preferred Stock \| O 2027 M1 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods				$ 0.156250
Amount Distributed				$ 826
7.50% Preferred Stock \| O 2027 M2 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods				$ 0.156250
Amount Distributed				$ 876
7.50% Preferred Stock \| O 2027 M3 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods				$ 0.156250
Amount Distributed				$ 919
7.50% Preferred Stock \| O 2026 M1 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods					$ 0.156250
Amount Distributed					$ 331
7.50% Preferred Stock \| O 2026 M2 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods					$ 0.156250
Amount Distributed					$ 384
7.50% Preferred Stock \| O 2026 M3 Dividends
Class of Stock [Line Items]
Amount ($ per share), before pro ration for partial periods					$ 0.156250
Amount Distributed					$ 419