Fees and Reimbursable Expenses Incurred and Due (Parenthetical) (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Fees Paid and Related Party Transactions [Line Items]
Deferred Asset management fees	$ 300,000	$ 300,000	$ 900,000	$ 900,000
Deferred operating-related personnel expenses	100,000	80,000	300,000	500,000
Decrease asset management fees	(300,000)		(900,000)
Decrease operating expenses	(100,000)		(300,000)
Restricted Stock
Fees Paid and Related Party Transactions [Line Items]
Related party arrangement, fair value of restricted stock issuable to Advisor			$ 0