Related Party Transactions - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Related Party Transactions [Abstract]
Sales commission fee - percent of gross proceeds	7.00%	7.00%	7.00%	7.00%
Dealer Manager fees - percent of gross proceeds	2.50%	2.50%	2.50%	2.50%
Acquisition fees - percent of total purchase price of real estate properties acquired in the operational stage	1.00%	1.00%	1.00%	1.00%
Acquisition fees - percent of total project costs for real estate properties acquired in the development stage	4.00%	4.00%	4.00%	4.00%
Asset management fees - monthly fee of one-twelfth of percentage of the aggregate cost	0.80%	0.80%	0.80%	0.80%
Asset management fees - disposition percentage	2.00%	2.00%	2.00%	2.00%
Organization and offering expense reimbursement to advisor or affiliates as a percentage of gross offering proceeds	1.75%	1.75%	1.75%	1.75%
Fees paid to the Advisor by joint venture				$ 3.3