Consolidated Statements of Shareholders' Equity (Parenthetical) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Preferred stock, dividend rate (as a percent)	7.00%	7.00%	7.00%
Dividends on common stock per share	$ 0.4	$ 0.36	$ 0.32
Offering expenses	$ 5,500,000	$ 5,500,000	$ 5,500,000
7% Series A Preferred Stock
Dividends on preferred stock per share	$ 1.75	$ 1.75	$ 1.75
7% Series A Preferred Stock | Preferred stock
Preferred stock, dividend rate (as a percent)	7.00%	7.00%	7.00%
6% Series B Preferred Stock
Preferred stock, dividend rate (as a percent)	6.00%	6.00%
Dividends on preferred stock per share	$ 60	$ 60	$ 60
6% Series B Preferred Stock | Preferred stock
Preferred stock, dividend rate (as a percent)	6.00%	6.00%	6.00%
6% Series C Preferred Stock
Preferred stock, dividend rate (as a percent)	6.00%	6.00%
Dividends on preferred stock per share	$ 60	$ 60	$ 60
6% Series C Preferred Stock | Preferred stock
Preferred stock, dividend rate (as a percent)	6.00%	6.00%	6.00%
8.25% Series D Preferred Stock
Preferred stock, dividend rate (as a percent)	8.25%	8.25%
Dividends on preferred stock per share	$ 82.5	$ 82.5	$ 82.5
8.25% Series D Preferred Stock | Preferred stock
Preferred stock, dividend rate (as a percent)	8.25%	8.25%	8.25%
7.625% Series E Preferred Stock
Preferred stock, dividend rate (as a percent)	7.625%	7.625%
Dividends on preferred stock per share	$ 76.25	$ 76.25	$ 76.25
7.625% Series E Preferred Stock | Preferred stock
Preferred stock, dividend rate (as a percent)	7.625%	7.625%	7.625%
Offering costs	$ 7,300,000	$ 7,300,000	$ 7,300,000