Shareholders' Equity - Additional Information (Detail) - $ / shares			6 Months Ended
	Aug. 01, 2024	May 13, 2024	Jun. 30, 2024	Dec. 31, 2023
Class of Stock [Line Items]
Preferred stock, shares authorized			20,000,000	20,000,000
Preferred stock, par value			$ 1.00	$ 1.00
Preferred Series E
Class of Stock [Line Items]
Preferred stock dividend rate (as a percent)			6.45%
Preferred stock, liquidation preference per share (in USD per share)			$ 1,000	1,000
Preferred stock. dividend rate spread (as a percent)			3.87%
Preferred Series F
Class of Stock [Line Items]
Preferred stock dividend rate (as a percent)			5.125%
Preferred stock, liquidation preference per share (in USD per share)			$ 10,000	10,000
Preferred stock. dividend rate spread (as a percent)			3.78%
Preferred Series G
Class of Stock [Line Items]
Preferred stock dividend rate (as a percent)			5.00%
Preferred stock, liquidation preference per share (in USD per share)			$ 10,000	10,000
Preferred stock. dividend rate spread (as a percent)			3.174%
Preferred Series G | Subsequent Event [Member]
Class of Stock [Line Items]
Preferred stock dividend rate (as a percent)	7.246%
Series H Preferred Stock
Class of Stock [Line Items]
Preferred stock dividend rate (as a percent)			5.625%
Preferred stock, liquidation preference per share (in USD per share)			$ 25	25
Preferred stock. dividend rate spread (as a percent)			4.28%
Preferred Series I
Class of Stock [Line Items]
Preferred stock dividend rate (as a percent)			3.50%
Preferred stock, liquidation preference per share (in USD per share)			$ 10,000	10,000
Preferred stock. dividend rate spread (as a percent)			2.679%
Series J Preferred Stock
Class of Stock [Line Items]
Issuance of Series J preferred stock (in shares)		75,000
Preferred stock dividend rate (as a percent)		7.50%	7.50%
Preferred stock, liquidation preference per share (in USD per share)		$ 10,000	$ 10,000	$ 10,000