Quarterly report pursuant to Section 13 or 15(d)

Related-Party Transactions - Additional Information (Detail)

v2.4.0.8
Related-Party Transactions - Additional Information (Detail) (USD $)
 1 Months Ended 3 Months Ended 6 Months Ended 9 Months Ended
Feb. 28, 2013
Sep. 30, 2013
Mar. 31, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2013
Sep. 30, 2012
Related Party Transaction [Line Items]              
Maximum Annual management fee           2.00%  
Reimbursement for overhead expenses           2.00%  
Amount of payroll and benefits reimbursed           2.00%  
Overhead expense reimbursements limitation period           1 year  
Annual base management fee, in percentage of stockholders' equity, in excess of recorded value of preferred stock           1.00%  
Expected Annual Base Management Fee           2.00%  
Pre-incentive quarterly fee FFO in percentage of common stockholders equity that will reward the advisor           1.75%  
Pre-incentive annual fee FFO in percentage of common stockholders equity that will reward the advisor           7.00%  
Amount to be paid to Adviser in percentage of pre-incentive fee condition one 100.00%            
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 paid to adviser   $ 0 $ 41,037 $ 0 $ 0 $ 41,037 $ 0
Maximum [Member]
              
Related Party Transaction [Line Items]              
Adviser will receive 100% of the amount of the pre-incentive fee FFO annually that exceeds the hurdle but less than           8.75%