Annual report pursuant to Section 13 and 15(d)

Borrowings - Summary of Mortgage Note Payable and Line of Credit (Detail)

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Borrowings - Summary of Mortgage Note Payable and Line of Credit (Detail) (USD $)
 12 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
Mortgage Note Payable [Member]
Dec. 31, 2013
MetLife [Member]
Mortgage Note Payable [Member]
Dec. 31, 2010
MetLife [Member]
Mortgage Note Payable [Member]
Dec. 31, 2012
MetLife [Member]
Mortgage Note Payable [Member]
Dec. 31, 2013
MetLife [Member]
Line of Credit [Member]
Dec. 31, 2012
MetLife [Member]
Line of Credit [Member]
May 31, 2012
MetLife [Member]
Line of Credit [Member]
Debt Instrument [Line Items]                  
Issuer       Metlife     Metlife    
Date of Issuance       Dec. 30, 2010     May 31, 2012    
Initial Commitment     $ 43,054,165 $ 45,200,000     $ 4,785,000   $ 4,800,000
Maturity date       Jan. 05, 2026 Jan. 05, 2026   Apr. 05, 2017    
Principal Outstanding 43,154,165 30,817,880   43,054,165   30,717,880 100,000 100,000  
Stated Interest Rate       3.50%   3.50% 3.25% 3.35%  
Remaining Availability $ 4,685,000 $ 18,250,000       $ 13,565,000 $ 4,685,000 $ 4,685,000