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Equity and Mezzanine Equity - Dividends Paid (Detail) - $ / shares | 3 Months Ended | 6 Months Ended
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Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Senior Common Stock |  |  |  |
Dividends Payable [Line Items] |  |  |  |
Common Stock, dividends paid (in dollars per share) | $ 0.2625 | $ 0.2625 | $ 0.5250 | $ 0.5250
Series D Preferred Stock |  |  |  |
Dividends Payable [Line Items] |  |  |  |
Preferred Stock, dividends paid (in dollars per share) | 0 | 0.4374999 | 0 | 0.8749998
Series E Preferred Stock |  |  |  |
Dividends Payable [Line Items] |  |  |  |
Preferred Stock, dividends paid (in dollars per share) | 0.414063 | 0.414063 | 0.828126 | 0.828126
Series F Preferred Stock |  |  |  |
Dividends Payable [Line Items] |  |  |  |
Preferred Stock, dividends paid (in dollars per share) | 0.375 | 0.375 | 0.750 | 0.750
Series G Preferred Stock |  |  |  |
Dividends Payable [Line Items] |  |  |  |
Preferred Stock, dividends paid (in dollars per share) | 0.375 | 0 | 0.750 | 0
Common Stock |  |  |  |
Dividends Payable [Line Items] |  |  |  |
Common Stock, dividends paid (in dollars per share) | $ 0.37620 | $ 0.37545 | $ 0.75240 | $ 0.75090

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