Shareholders' Equity - Summary of Perpetual Preferred Stock Issued and Outstanding (Parenthetical) (Detail) - $ / shares	1 Months Ended
	Apr. 30, 2021	Jun. 30, 2021
Series A Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock		$ 0.01
Series C Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock		0.01
Series D Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock		0.01
Series E Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock		0.01
Series F Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock		0.01
Series J Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock		0.01
Series K Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock		0.01
Series O Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock		0.01
Series P Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock		0.01
Series Q Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock		0.01
Series R Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock		0.01
Series S Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock		0.01
Series T Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock		$ 0.01
Preferred stock shares issued	27,000
Dividend rate	3.80%