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Concentration of Credit Risk - Additional Information (Detail) (USD $)
 12 Months Ended 12 Months Ended
Dec. 31, 2013
Institution
Jul. 31, 2013
Dec. 31, 2013
Term Loan [Member]
Mar. 30, 2012
Term Loan [Member]
May 04, 2011
Term Loan [Member]
Dec. 31, 2013
Mortgage Payable [Member]
Jul. 11, 2008
Mortgage Payable [Member]
Dec. 31, 2013
Project Term Loan [Member]
Jul. 31, 2013
Project Term Loan [Member]
Concentration Of Credit Risk [Line Items]                  
Uninsured cash balance $ 31,700,000                
Number of financial institution in which cash is maintain 1                
Basis spread on variable rate, points   0.75% 1.00% 5.00% 5.00% 1.00% 0.75%   5.00%
Interest obligation from basis points variation, per month     $ 4,000     $ 1,000   $ 8,400  
Credit risk maturity period     2016-07     2016-07   2014-07  
Basis spread on variable rate, points               1.00%