Discontinued Operations - Additional Information (Detail) (USD $)	12 Months Ended			0 Months Ended	1 Months Ended	12 Months Ended	0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012 Property	Dec. 31, 2011	Feb. 14, 2013 Alpharetta [Member] PNC Bank [Member] sqft	Feb. 28, 2013 Alpharetta [Member] PNC Bank [Member]	Dec. 31, 2012 Alpharetta [Member] PNC Bank [Member]	Feb. 21, 2013 Clermont [Member] CVS [Member] sqft	May 31, 2013 Kissimmee [Member] Walgreens [Member] sqft	Dec. 30, 2013 Orlando [Member] PNC Bank [Member] sqft	Dec. 10, 2013 Orlando [Member] Walgreens [Member] sqft
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Area of discontinued operations sold property under lease				4,128			13,824	13,905	4,128	15,120
Selling price of disposition of assets				$ 3,550,000			$ 4,050,000	$ 3,400,000	$ 3,740,368	$ 3,877,373
Loss from disposal of property discontinued operation before income tax						(427,000)
Gain (loss) on sale of property	$ 1,215,928	$ 78,455	$ 146,977		$ (26,000)		$ 54,000	$ 503,000	$ 198,000	$ 487,000
Number of investment properties		2