Related Party Transactions - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Related Party Transaction [Line Items]
Maximum period for reimbursement of offering cost	60 days
Maximum offering cost rate	3.50%
Follow-on offering termination date	Sep. 22, 2013
Gross proceeds from offering, threshold percentage of expenses for reimbursement	15.00%
Rate of acquisition fees of purchase price of contract	2.50%
Monthly asset management fee one twelfth of one percentage of asset value	One-twelfth of 1.0%
Monthly asset management fee one twelfth of less than one percentage of asset value payable if asset value exceeds $500 million	One-twelfth of 0.75%
Aggregate asset value specific exceed	$ 500,000,000
Minimum percentage of distribution	100.00%
Property management fees percentage of property revenue for REIT I, REIT II and the SS I, DST, Madison DST and Colonial DST acquisitions	2.00%
Advisory fees percentage of sale price of property	3.00%
Commission percentage of sale price of property	6.00%
Cumulative, non compounded, annual return on such stockholders' invested capital	6.00%
Operating expenses reimbursement percentage of average investment in assets	2.00%
Operating expenses reimbursement percentage of net income	25.00%
Operating expenses exceed limitation	12 months
Maximum days for disclosure fact	60 days
Second Amended and Restated Advisory Agreement entered date	Sep. 27, 2012
Sale commission fees percentage of proceed from Primary Offering	7.00%
Maximum dealer manager commission fee percentage of proceeds from Primary Offering	3.00%
Underwriting commission	10.00%
Maximum percentage other non-accountable expenses	3.00%
Percentage owned by chief executive officer in Dealer Manager	15.00%
Percentage of fee of property manager	6.00%
Return needed for before the Property Manager entitled to property management fees on properties acquired via the REIT II merger	$ 0.70
Property management fees	217,000
Increase in agreement term due to revision	3 years
Automatic extension period	3 years
Amounts due to affiliates	1,741,518	2,282,344
Percentage of tenant premium paid approximately, fees provided by program insurer	50.00%
Revenue recorded in connection with reinsurance program	1,600,000	1,300,000	400,000
Auction fees	$ 50,000
Executive Officer [Member] | Auction Company [Member]
Related Party Transaction [Line Items]
Voting interests	18.00%