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Subsequent Events - Monthly Distributions Declared by Company's Board of Directors (Detail) - $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 Months Ended
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Jul. 06, 2022 | Jun. 30, 2022 | Jun. 29, 2022 | Jun. 22, 2022 | Jun. 06, 2022 | May 31, 2022 | May 27, 2022 | May 20, 2022 | May 13, 2022 | May 06, 2022 | Apr. 29, 2022 | Apr. 28, 2022 | Apr. 22, 2022 | Apr. 12, 2022 | Apr. 30, 2022
Forecast | Dividend Declared, Period Two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Record Date |  |  |  |  |  |  |  | May 20, 2022 |  |  |  |  |  |  |
Payment Date |  |  |  |  |  | May 31, 2022 |  |  |  |  |  |  |  |  |
Forecast | Dividend Declared, Period Three |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Record Date |  |  |  | Jun. 22, 2022 |  |  |  |  |  |  |  |  |  |  |
Payment Date |  | Jun. 30, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event | Dividend Declared, Period One |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Record Date |  |  |  |  |  |  |  |  |  |  |  |  | Apr. 22, 2022 |  |
Payment Date |  |  |  |  |  |  |  |  |  |  | Apr. 29, 2022 |  |  |  |
Series E Preferred Stock | Forecast | Dividend Declared, Period Two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distribution per share (in dollars per share) |  |  |  |  |  | $ 0.138021 |  |  |  |  |  |  |  |  |
Series E Preferred Stock | Forecast | Dividend Declared, Period Three |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distribution per share (in dollars per share) |  | $ 0.138021 |  |  |  |  |  |  |  |  |  |  |  |  |
Series E Preferred Stock | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distribution per share (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.414063 |
Series E Preferred Stock | Subsequent Event | Dividend Declared, Period One |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distribution per share (in dollars per share) |  |  |  |  |  |  |  |  |  |  | $ 0.138021 |  |  |  |
Series G Preferred Stock | Forecast | Dividend Declared, Period Two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distribution per share (in dollars per share) |  |  |  |  |  | 0.125 |  |  |  |  |  |  |  |  |
Series G Preferred Stock | Forecast | Dividend Declared, Period Three |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distribution per share (in dollars per share) |  | 0.125 |  |  |  |  |  |  |  |  |  |  |  |  |
Series G Preferred Stock | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distribution per share (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.375 |
Series G Preferred Stock | Subsequent Event | Dividend Declared, Period One |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distribution per share (in dollars per share) |  |  |  |  |  |  |  |  |  |  | 0.125 |  |  |  |
Senior Common Stock | Forecast | Dividend Declared, Period Two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment Date |  |  |  |  | Jun. 06, 2022 |  |  |  |  |  |  |  |  |  |
Distribution per share (in dollars per share) |  |  |  |  | $ 0.0875 |  |  |  |  |  |  |  |  |  |
Senior Common Stock | Forecast | Dividend Declared, Period Three |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment Date | Jul. 06, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distribution per share (in dollars per share) | $ 0.0875 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Common Stock | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distribution per share (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.2625 |
Senior Common Stock | Subsequent Event | Dividend Declared, Period One |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payable to the Holders of Record During the Month of: |  |  |  |  |  |  |  |  |  |  |  |  |  |  | April
Payment Date |  |  |  |  |  |  |  |  | May 06, 2022 |  |  |  |  |  |
Distribution per share (in dollars per share) |  |  |  |  |  |  |  |  |  | $ 0.0875 |  |  |  |  |
Senior Common Stock | Subsequent Event | Dividend Declared, Period Two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payable to the Holders of Record During the Month of: |  |  |  |  |  |  |  |  |  |  |  |  |  | May |
Senior Common Stock | Subsequent Event | Dividend Declared, Period Three |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payable to the Holders of Record During the Month of: |  |  |  |  |  |  |  |  |  |  |  |  |  | June |
Series F Preferred Stock | Forecast | Dividend Declared, Period Two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payable to the Holders of Record During the Month of: |  |  |  |  |  |  | May 27, 2022 |  |  |  |  |  |  |  |
Payment Date |  |  |  |  | Jun. 06, 2022 |  |  |  |  |  |  |  |  |  |
Distribution per share (in dollars per share) |  |  |  |  | $ 0.125 |  |  |  |  |  |  |  |  |  |
Series F Preferred Stock | Forecast | Dividend Declared, Period Three |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payable to the Holders of Record During the Month of: |  |  | June 29, 2022 |  |  |  |  |  |  |  |  |  |  |  |
Payment Date | Jul. 06, 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distribution per share (in dollars per share) | $ 0.125 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Series F Preferred Stock | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distribution per share (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.375 |
Series F Preferred Stock | Subsequent Event | Dividend Declared, Period One |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payable to the Holders of Record During the Month of: |  |  |  |  |  |  |  |  |  |  |  | April 28, 2022 |  |  |
Payment Date |  |  |  |  |  |  |  |  |  | May 06, 2022 |  |  |  |  |
Distribution per share (in dollars per share) |  |  |  |  |  |  |  |  |  | $ 0.125 |  |  |  |  |
Common Stock | Forecast | Dividend Declared, Period Two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distribution per share (in dollars per share) |  |  |  |  |  | $ 0.12540 |  |  |  |  |  |  |  |  |
Common Stock | Forecast | Dividend Declared, Period Three |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distribution per share (in dollars per share) |  | $ 0.12540 |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distribution per share (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.37620 |
Common Stock | Subsequent Event | Dividend Declared, Period One |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distribution per share (in dollars per share) |  |  |  |  |  |  |  |  |  |  | $ 0.12540 |  |  |  |

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