Quarterly report pursuant to Section 13 or 15(d)

Related-Party Transactions - Additional Information (Detail)

v3.5.0.2
Related-Party Transactions - Additional Information (Detail)
 3 Months Ended 9 Months Ended
Jul. 24, 2015
Jul. 01, 2015
quarter
May 25, 2011
USD ($)
Sep. 30, 2016
USD ($)
Sep. 30, 2015
USD ($)
Sep. 30, 2016
USD ($)
officer
Sep. 30, 2015
USD ($)
Dec. 31, 2015
USD ($)
Related Party Transaction [Line Items]                
Number of executive officers | officer           2    
Due to Adviser and Administrator [1]       $ 1,991,000   $ 1,991,000   $ 1,858,000
Annual base management fee, in percentage of stockholders' equity, adjusted to unrealized gains or losses   1.50%            
Quarterly base management fee, in percentage of stockholders' equity, adjusted to unrealized gains or losses   0.375%            
Annual base management fee, in percentage of stockholders' equity, in excess of recorded value of preferred stock 2.00%              
Base management fee [2]       1,072,000 $ 872,000 $ 2,789,000 $ 2,589,000  
Pre-incentive quarterly fee FFO in percentage of common stockholders' equity that will reward the Adviser   2.00%       1.75%    
Pre-incentive annual fee FFO in percentage of common stockholders' equity that will reward the Adviser   8.00%       7.00%    
Amount to be paid to Adviser in percentage of pre-incentive fee condition one   15.00%       100.00%    
Number of quarters used for the cap of average quarterly incentive fees | quarter   4            
Pre-incentive fee in percentage of common stockholders' equity that awards Adviser hundred percent of amount of pre-incentive fee, maximum percentage           2.1875%    
Amount to be paid to Adviser in percentage of pre-incentive fee condition two           20.00%    
Pre-incentive fee in percentage of common stockholders' equity that awards the Adviser 20% of the amount of the pre-incentive fee, minimum percentage           2.1875%    
Incentive fee [2]       564,000 621,000 $ 1,837,000 4,054,000  
Credits related to unconditional and irrevocable voluntary waivers issued by the Adviser [2]       0 0   2,500,000  
Related-party transactions incentive fee, net         600,000   1,600,000  
Capital gains-based incentive fee percentage   15.00%            
Capital gain fee       0 0 $ 0 0  
Percentage of independent directors to terminate the Amended Advisory Agreement           66.67%    
Notice period for termination of agreement without cause   120 days            
Notice period for termination of agreement with cause   30 days            
Administration fee [2]       311,000 326,000 $ 1,086,000 1,054,000  
Fees paid       $ 50,000 $ 20,000 $ 200,000 $ 200,000  
Financing fee on total secured mortgages percentage       0.28% 0.30% 0.36% 0.30%  
Minimum [Member]                
Related Party Transaction [Line Items]                
Percentage of the amount of the mortgage           0.15%    
Maximum [Member]                
Related Party Transaction [Line Items]                
Percentage of the amount of the mortgage           1.00%    
Dealer Manager [Member]                
Related Party Transaction [Line Items]                
Agreement termination date     Mar. 28, 2015          
Wrote-off of deferred offering costs     $ 100,000          
Dealer manager fee in percentage of gross proceeds of shares of Senior Common Stock sold     7.00%          
Sales commission fee in percentage of gross proceeds of shares of Senior Common Stock sold     3.00%          
Payments made to the Dealer Manager pursuant to Dealer Manager Agreement             $ 300,000  
Adviser and Administrator [Member]                
Related Party Transaction [Line Items]                
Credits related to unconditional and irrevocable voluntary waivers issued by the Adviser [2]           $ 0    
[1] Refer to Note 2 "Related-Party Transactions"
[2] Refer to Note 2 “Related-Party Transactions”