Commercial Mortgage Loan - Additional Information (Detail) (USD $)	12 Months Ended		0 Months Ended
	Dec. 31, 2013	Dec. 31, 2013 Commercial Mortgage Loan [Member]	Aug. 07, 2013 Commercial Mortgage Loan [Member] Atlanta [Member]	Dec. 31, 2013 Commercial Mortgage Loan [Member] Atlanta [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired loan		$ 19,560,000	$ 19,600,000	$ 19,560,000
Payment to acquired loan	17,658,204		17,500,000
Discount on acquired loan			2,050,000
Maturity Date			2014-03	2014-03
Accrued interest on the commercial mortgage loan		$ 43,000
Date on which loans were paid	2014-01-06