Annual report pursuant to Section 13 and 15(d)

Related-Party Transactions - Additional Information (Detail)

v3.6.0.2
Related-Party Transactions - Additional Information (Detail) - USD ($)
 1 Months Ended 6 Months Ended 12 Months Ended
Jul. 01, 2015
Jul. 31, 2015
Dec. 31, 2015
Jun. 30, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Related Party Transaction [Line Items]              
Number of executive officers         2    
Due to Adviser and Administrator [1]     $ 1,858,000   $ 2,075,000 $ 1,858,000  
Annual base management fee, in percentage of stockholders' equity, adjusted to unrealized gains or losses (as percent) 1.50%            
Quarterly base management fee, in percentage of stockholders' equity, adjusted to unrealized gains or losses (as percent) 0.375%            
Annual base management fee, in percentage of stockholders' equity, in excess of recorded value of preferred stock (as percent)       2.00%      
Base management fee [2]         3,930,000 3,474,000 $ 2,798,000
Credit to base management fee [2]         $ 0 0 150,000
Pre-incentive quarterly fee FFO in percentage of common stockholders' equity that will reward the Adviser (as percent) 2.00%     1.75%      
Pre-incentive annual fee FFO in percentage of common stockholders' equity that will reward the Adviser (as percent) 8.00%     7.00%      
Amount to be paid to Adviser in percentage of pre-incentive fee condition one (as percent) 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 (as percent)         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]         $ 2,381,000 4,650,000 4,305,000
Credits related to unconditional and irrevocable voluntary waivers issued by the Adviser [2]           2,500,000 3,013,000
Related-party transactions incentive fee, net         $ 2,400,000 2,200,000 1,300,000
Capital gains-based incentive fee percentage (as percent) 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 0 0
Notice period for termination of agreement without cause along with the two-thirds vote   120 days          
Notice period for termination of agreement with cause   30 days          
Multiple to compute the termination fee payable (as percent)   200.00%          
Administration fee [2]         1,474,000 1,419,000 1,526,000
Fees paid         $ 300,000 $ 200,000 $ 100,000
Financing fee on total secured mortgages (as percent)         0.32% 0.29% 0.27%
Minimum [Member]              
Related Party Transaction [Line Items]              
Percentage of the amount of the mortgage (as percent)         0.15%    
Maximum [Member]              
Related Party Transaction [Line Items]              
Percentage of the amount of the mortgage (as percent)         1.00%    
Amended Advisory Agreement [Member]              
Related Party Transaction [Line Items]              
Credits related to unconditional and irrevocable voluntary waivers issued by the Adviser     $ 0        
Adviser and Administrator [Member]              
Related Party Transaction [Line Items]              
Credits related to unconditional and irrevocable voluntary waivers issued by the Adviser [2]         $ 0    
Dealer Manager [Member]              
Related Party Transaction [Line Items]              
Agreement termination date         Mar. 28, 2015    
Write-off of deferred offering costs         $ 100,000    
Dealer manager fee in percentage of gross proceeds of shares of Senior Common Stock sold (as percent)         7.00%    
Sales commission fee in percentage of gross proceeds of shares of Senior Common Stock sold (as percent)         3.00%    
Payments made to the Dealer Manager pursuant to Dealer Manager Agreement           $ 300,000 $ 600,000
[1] Refer to Note 2 “Related-Party Transactions”
[2] Refer to Note 2 “Related-Party Transactions”