Annual report pursuant to Section 13 and 15(d)

Equity and Mezzanine Equity - Dividends Declared (Detail)

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Equity and Mezzanine Equity - Dividends Declared (Detail) - $ / shares
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Senior Common Stock      
Dividends Payable [Line Items]      
Common stock, cash paid (in dollars per share) $ 1.05 $ 1.05 $ 1.05
Series A Preferred Stock      
Dividends Payable [Line Items]      
Preferred stock, cash paid (in dollars per share) 1.6038191 1.9374996 1.9374996
Series B Preferred Stock      
Dividends Payable [Line Items]      
Preferred stock, cash paid (in dollars per share) 1.5521 1.8750 1.8750
Series D Preferred Stock      
Dividends Payable [Line Items]      
Preferred stock, cash paid (in dollars per share) 1.7500 1.7500 1.7500
Series E Preferred Stock      
Dividends Payable [Line Items]      
Preferred stock, cash paid (in dollars per share) 0.4049 0.0000 0.0000
Common Stock and Non-controlling OP Units      
Dividends Payable [Line Items]      
Common stock, cash paid (in dollars per share) $ 1.5 $ 1.5 $ 1.5