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)
 1 Months Ended 3 Months Ended 6 Months Ended
Jul. 24, 2015
Jul. 01, 2015
quarter
May 25, 2011
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2016
USD ($)
officer
Jun. 30, 2015
USD ($)
Dec. 31, 2015
USD ($)
Related Party Transaction [Line Items]                  
Number of executive officers | officer             2    
Due to Adviser and Administrator [1]       $ 1,884,000 $ 1,884,000   $ 1,884,000   $ 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]         856,000 $ 866,000 $ 1,717,000 $ 1,717,000  
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]         655,000 1,760,000 $ 1,273,000 3,433,000  
Credits related to unconditional and irrevocable voluntary waivers issued by the Adviser [2]         0 1,316,000   2,500,000  
Related-party transactions incentive fee, net           500,000   900,000  
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]         370,000 366,000 $ 775,000 728,000  
Wrote-off of deferred offering costs       $ 100,000          
Fees paid         $ 100,000 $ 100,000 $ 100,000 $ 200,000  
Financing fee on total secured mortgages percentage         0.35% 0.30% 0.39% 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    
Related-party transactions incentive fee, net         $ 700,000   $ 1,300,000    
[1] Refer to Note 2 "Related-Party Transactions"
[2] Refer to Note 2 “Related-Party Transactions”