Annual report pursuant to Section 13 and 15(d)

Subsequent Events - Monthly Distributions Declared by Company's Board of Directors (Detail)

v3.10.0.1
Subsequent Events - Monthly Distributions Declared by Company's Board of Directors (Detail) - $ / shares
 1 Months Ended
Apr. 08, 2019
Mar. 29, 2019
Mar. 20, 2019
Mar. 07, 2019
Feb. 28, 2019
Feb. 20, 2019
Feb. 07, 2019
Jan. 31, 2019
Jan. 18, 2019
Mar. 31, 2019
Feb. 28, 2019
Jan. 31, 2019
Jan. 08, 2019
Subsequent event | Series A Preferred Stock                          
Dividends Payable [Line Items]                          
Distributions (in dollars per share)                         $ 0.4843749
Subsequent event | Series B Preferred Stock                          
Dividends Payable [Line Items]                          
Distributions (in dollars per share)                         0.46875
Subsequent event | Series D Preferred Stock                          
Dividends Payable [Line Items]                          
Distributions (in dollars per share)                         0.4374999
Subsequent event | Senior Common Stock                          
Dividends Payable [Line Items]                          
Distributions (in dollars per share)                         0.2625
Subsequent event | Common Stock and Non-controlling OP Units                          
Dividends Payable [Line Items]                          
Distributions (in dollars per share)                         $ 0.375
Subsequent event | Dividend Declared for Month of January                          
Dividends Payable [Line Items]                          
Record date                 Jan. 18, 2019        
Payment date               Jan. 31, 2019          
Subsequent event | Dividend Declared for Month of January | Series A Preferred Stock                          
Dividends Payable [Line Items]                          
Distributions (in dollars per share)               $ 0.1614583       $ 0.1614583  
Subsequent event | Dividend Declared for Month of January | Series B Preferred Stock                          
Dividends Payable [Line Items]                          
Distributions (in dollars per share)               0.15625       0.15625  
Subsequent event | Dividend Declared for Month of January | Series D Preferred Stock                          
Dividends Payable [Line Items]                          
Distributions (in dollars per share)               0.1458333       $ 0.1458333  
Subsequent event | Dividend Declared for Month of January | Senior Common Stock                          
Dividends Payable [Line Items]                          
Payment date             Feb. 07, 2019            
Month in which distribution is payable to holders of record                       January  
Distributions (in dollars per share)             $ 0.0875            
Subsequent event | Dividend Declared for Month of January | Common Stock and Non-controlling OP Units                          
Dividends Payable [Line Items]                          
Distributions (in dollars per share)               $ 0.125       $ 0.125  
Scenario, Forecast | Dividend Declared for Month of February                          
Dividends Payable [Line Items]                          
Record date           Feb. 20, 2019              
Payment date         Feb. 28, 2019                
Scenario, Forecast | Dividend Declared for Month of February | Series A Preferred Stock                          
Dividends Payable [Line Items]                          
Distributions (in dollars per share)         $ 0.1614583           $ 0.1614583    
Scenario, Forecast | Dividend Declared for Month of February | Series B Preferred Stock                          
Dividends Payable [Line Items]                          
Distributions (in dollars per share)         0.15625           0.15625    
Scenario, Forecast | Dividend Declared for Month of February | Series D Preferred Stock                          
Dividends Payable [Line Items]                          
Distributions (in dollars per share)         0.1458333           $ 0.1458333    
Scenario, Forecast | Dividend Declared for Month of February | Senior Common Stock                          
Dividends Payable [Line Items]                          
Payment date       Mar. 07, 2019                  
Month in which distribution is payable to holders of record                     February    
Distributions (in dollars per share)       $ 0.0875                  
Scenario, Forecast | Dividend Declared for Month of February | Common Stock and Non-controlling OP Units                          
Dividends Payable [Line Items]                          
Distributions (in dollars per share)         $ 0.125           $ 0.125    
Scenario, Forecast | Dividend Declared for Month of March                          
Dividends Payable [Line Items]                          
Record date     Mar. 20, 2019                    
Payment date   Mar. 29, 2019                      
Scenario, Forecast | Dividend Declared for Month of March | Series A Preferred Stock                          
Dividends Payable [Line Items]                          
Distributions (in dollars per share)   $ 0.1614583                      
Scenario, Forecast | Dividend Declared for Month of March | Series B Preferred Stock                          
Dividends Payable [Line Items]                          
Distributions (in dollars per share)   0.15625                      
Scenario, Forecast | Dividend Declared for Month of March | Series D Preferred Stock                          
Dividends Payable [Line Items]                          
Distributions (in dollars per share)   0.1458333                      
Scenario, Forecast | Dividend Declared for Month of March | Senior Common Stock                          
Dividends Payable [Line Items]                          
Payment date Apr. 08, 2019                        
Month in which distribution is payable to holders of record                   March      
Distributions (in dollars per share) $ 0.0875                        
Scenario, Forecast | Dividend Declared for Month of March | Common Stock and Non-controlling OP Units                          
Dividends Payable [Line Items]                          
Distributions (in dollars per share)   $ 0.125