Real Estate Acquired and Sold - Additional Information (Detail) (USD $)	1 Months Ended
	Aug. 31, 2013 Kentlands Pad sqft	Dec. 31, 2013 Hunt Club Pad sqft	Jan. 31, 2014 1580 Rockville Pike sqft	Jan. 31, 2014 1580 Rockville Pike In-place Lease
Business Acquisition [Line Items]
Name of property	Kentlands Pad	Hunt Club Pad	1580 Rockville Pike
Acquisition year	2013	2013
Purchase price	$ 4,300,000	$ 800,000	$ 8,000,000
Property type	retail pad	retail pad
Area of real estate property (in sq ft)	7,100	5,500	12,100
Location of property	Gaithersburg, Maryland	Apopka, Florida	Rockville, Maryland
Property acquisition costs	99,000		163,000
Remaining life of the lease			10 years
Purchase Price Allocation:
Land			9,600,000
Building			2,200,000
In-place lease				513,000
Below-market rents			4,313,000
Total acquisition cost			$ 8,000,000