Annual report pursuant to Section 13 and 15(d)

Equity and Mezzanine Equity - Summary of Changes in Stockholders' Equity (Detail)

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Equity and Mezzanine Equity - Summary of Changes in Stockholders' Equity (Detail)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Ordinary Income | Common Stock and Non-controlling OP Units      
Dividends Payable [Line Items]      
Common stock, dividend rate (as percent) 44.46159% 24.46913% 39.63189%
Ordinary Income | Senior Common Stock      
Dividends Payable [Line Items]      
Common stock, dividend rate (as percent) 100.00% 100.00% 100.00%
Ordinary Income | Series A Preferred Stock      
Dividends Payable [Line Items]      
Preferred stock, dividend rate (as percent) 100.00% 100.00% 100.00%
Ordinary Income | Series B Preferred Stock      
Dividends Payable [Line Items]      
Preferred stock, dividend rate (as percent) 100.00% 100.00% 100.00%
Ordinary Income | Series D Preferred Stock      
Dividends Payable [Line Items]      
Preferred stock, dividend rate (as percent) 100.00% 100.00% 100.00%
Ordinary Income | Series D Preferred Stock      
Dividends Payable [Line Items]      
Preferred stock, dividend rate (as percent) 100.00% 0.00% 0.00%
Return of Capital | Common Stock and Non-controlling OP Units      
Dividends Payable [Line Items]      
Common stock, dividend rate (as percent) 55.53841% 75.53087% 60.36811%
Return of Capital | Senior Common Stock      
Dividends Payable [Line Items]      
Common stock, dividend rate (as percent) 0.00% 0.00% 0.00%
Return of Capital | Series A Preferred Stock      
Dividends Payable [Line Items]      
Preferred stock, dividend rate (as percent) 0.00% 0.00% 0.00%
Return of Capital | Series B Preferred Stock      
Dividends Payable [Line Items]      
Preferred stock, dividend rate (as percent) 0.00% 0.00% 0.00%
Return of Capital | Series D Preferred Stock      
Dividends Payable [Line Items]      
Preferred stock, dividend rate (as percent) 0.00% 0.00% 0.00%
Return of Capital | Series D Preferred Stock      
Dividends Payable [Line Items]      
Preferred stock, dividend rate (as percent) 0.00% 0.00% 0.00%
Long-Term Capital Gains | Common Stock and Non-controlling OP Units      
Dividends Payable [Line Items]      
Common stock, dividend rate (as percent) 0.00% 0.00% 0.00%
Long-Term Capital Gains | Senior Common Stock      
Dividends Payable [Line Items]      
Common stock, dividend rate (as percent) 0.00% 0.00% 0.00%
Long-Term Capital Gains | Series A Preferred Stock      
Dividends Payable [Line Items]      
Preferred stock, dividend rate (as percent) 0.00% 0.00% 0.00%
Long-Term Capital Gains | Series B Preferred Stock      
Dividends Payable [Line Items]      
Preferred stock, dividend rate (as percent) 0.00% 0.00% 0.00%
Long-Term Capital Gains | Series D Preferred Stock      
Dividends Payable [Line Items]      
Preferred stock, dividend rate (as percent) 0.00% 0.00% 0.00%
Long-Term Capital Gains | Series D Preferred Stock      
Dividends Payable [Line Items]      
Preferred stock, dividend rate (as percent) 0.00% 0.00% 0.00%