Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Monthly Distributions Declared by Company's Board of Directors (Detail)

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Subsequent Events - Monthly Distributions Declared by Company's Board of Directors (Detail) (Subsequent Event [Member], USD $)
0 Months Ended
Oct. 07, 2014
Oct. 07, 2014
Subsequent Event [Line Items]    
Distribution per Common Share $ 0.09 $ 0.09
Dividend Period One [Member]
   
Subsequent Event [Line Items]    
Record Date Oct. 22, 2014  
Payment Date Oct. 31, 2014  
Distribution per Common Share   $ 0.03
Dividend Period Two [Member]
   
Subsequent Event [Line Items]    
Record Date Nov. 17, 2014  
Payment Date Nov. 26, 2014  
Distribution per Common Share   $ 0.03
Dividend Period Three [Member]
   
Subsequent Event [Line Items]    
Record Date Dec. 19, 2014  
Payment Date Dec. 31, 2014  
Distribution per Common Share   $ 0.03