Annual report pursuant to Section 13 and 15(d)

Related-Party Transactions - Additional Information (Detail)

v3.3.1.900
Related-Party Transactions - Additional Information (Detail) - USD ($)
 6 Months Ended 12 Months Ended
Jul. 24, 2015
Jul. 01, 2015
Dec. 31, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Related Party Transaction [Line Items]            
Due to Adviser and Administrator [1]     $ 1,858,000 $ 1,858,000 $ 916,000  
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 [1]       3,474,000 2,798,000 $ 2,014,000
Credit to base management fee       $ 0 200,000 0
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%    
Incentive fee description       However, in no event shall the incentive fee for a particular quarter exceed by 15.0% (the cap) the average quarterly incentive fee paid by us for the previous four quarters (excluding quarters for which no incentive fee was paid).    
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 [1]       $ 4,650,000 4,305,000 4,201,000
Credits related to unconditional and irrevocable voluntary waivers issued by the Adviser [1]       $ 2,500,000 3,013,000 3,457,000
Capital gains-based incentive fee percentage   15.00%        
Capital gains incentive fee description       At the end of the fiscal year, if this number is positive, then the capital gain fee payable for such time period shall equal 15.0% of such amount.    
Capital gain fee       $ 0    
Notice period for termination of agreement without cause   120 days        
Notice period for termination of agreement with cause   30 days        
Administration fee [1]       $ 1,419,000 1,526,000 1,467,000
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%    
Fees paid       $ 200,000 $ 100,000 $ 100,000
Financing fee on total secured mortgages percentage       0.30% 0.30% 0.20%
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%    
Amended Advisory Agreement [Member]            
Related Party Transaction [Line Items]            
Credits related to unconditional and irrevocable voluntary waivers issued by the Adviser     0      
Dealer Manager [Member]            
Related Party Transaction [Line Items]            
Agreement termination date       Mar. 28, 2015    
Wrote-off of deferred offering costs       $ 100,000    
Payments made to the Dealer Manager pursuant to Dealer Manager Agreement       300,000 $ 600,000 $ 300,000
Adviser and Administrator [Member]            
Related Party Transaction [Line Items]            
Due to Adviser and Administrator     $ 1,900,000 1,900,000 900,000  
Related-party transactions incentive fee, net       $ 2,200,000 $ 1,300,000 $ 700,000
[1] Refer to Note 2 "Related-Party Transactions"