Annual report pursuant to Section 13 and 15(d)

Related-Party Transactions - Additional Information (Detail)

v3.20.4
Related-Party Transactions - Additional Information (Detail)
 1 Months Ended 12 Months Ended
Jul. 14, 2020
Feb. 20, 2020
$ / shares
shares
Jan. 08, 2019
Jul. 31, 2015
Dec. 31, 2020
USD ($)
officer
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Related Party Transaction [Line Items]              
Number of executive officers | officer         2    
Due to adviser and administrator [1]         $ 2,960,000 $ 2,904,000  
Annual base management fee, in percentage of stockholders' equity, adjusted to unrealized gains or losses (as percent) 0.425%   1.50%        
Quarterly base management fee, in percentage of stockholders' equity, adjusted to unrealized gains or losses (as percent) 0.10625%   0.375%        
Base management fee [2]         $ 5,648,000 5,174,000 $ 5,054,000
Pre-incentive quarterly fee FFO in percentage of common stockholders' equity that will reward the adviser (as percent)         2.00%    
Pre-incentive annual fee FFO in percentage of common stockholders' equity that will reward the adviser (as percent)         8.00%    
Amount to be paid to adviser in percentage of pre-incentive fee condition one (as percent)         15.00%    
Incentive fee [2]         $ 4,301,000 3,688,000 3,042,000
Portion of incentive fee waived         $ 0 0 0
Capital gains-based incentive fee percentage (as percent)         15.00%    
Capital gain fee         $ 0 0 0
Notice period for termination of agreement without cause         120 days    
Percentage of independent directors to terminate the Amended Advisory Agreement (as a percent)       66.67%      
Termination fee payable (as percent)       200.00%      
Payment period for termination of agreement         24 months    
Notice period for termination of agreement with cause         30 days    
Administration fee [2]         $ 1,598,000 1,690,000 1,605,000
Fees paid         $ 100,000 $ 200,000 $ 100,000
Financing fee on total secured mortgages (as percent)         0.25% 0.20% 0.11%
Selling commissions (as percent)   6.00%          
Dealer management fee (as percent)   3.00%          
Dealer Management Agreement | Series F Cumulative Redeemable Preferred Stock | Preferred Stock              
Related Party Transaction [Line Items]              
Preferred stock, dividend rate (as percent)   6.00%          
Redeemable preferred stock, shares authorized (in shares) | shares   20,000,000          
Redeemable preferred stock, par value (in dollars per share) | $ / shares   $ 0.001          
Redeemable preferred stock, dividend reinvestment plan, shares authorized (in shares) | shares   6,000,000          
Minimum              
Related Party Transaction [Line Items]              
Percentage of the amount of the mortgage (as percent)         0.15%    
Maximum              
Related Party Transaction [Line Items]              
Percentage of the amount of the mortgage (as percent)         1.00%    
[1] Refer to Note 2 “Related-Party Transactions”
[2] Refer to Note 2 “Related-Party Transactions”