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Concentration of Credit Risk - Additional Information (Detail) (USD $) | 9 Months Ended |  | 9 Months Ended |  | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2014 Institution | Jul. 31, 2013 | Sep. 30, 2014 Mortgages Payable [Member] | Jul. 11, 2008 Mortgages Payable [Member] | Sep. 30, 2014 Term Loan [Member] | Jul. 31, 2013 Term Loan [Member] | Sep. 30, 2014 Project Term Loans [Member]
Concentration Of Credit Risk [Line Items] |  |  |  |  |  |  |
Uninsured cash balance | $ 4,200,000 |  |  |  |  |  |
Number of financial institution in which cash is maintain | 1 |  |  |  |  |  |
Basis spread on variable rate, points |  | 0.75% | 0.01% | 0.75% |  | 5.00% | 5.00%
Interest obligation from basis points variation, per month |  |  | $ 839 |  | $ 2,629 |  | $ 6,457
Credit risk maturity period |  |  | 2016-07 |  |  |  |
Basis spread on variable rate, points |  |  |  |  | 0.01% |  |

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- Details
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