Summary of Significant Accounting Policies (Details) (USD $)	3 Months Ended
	Mar. 31, 2014 reporting_unit	Mar. 31, 2013	Dec. 31, 2013
Capital Expenditures and Leasing Costs
Expected capital expenditures and lease costs through 2013	$ 3,900,000
Debt
Mortgage and other loans, net	297,300,000
Unsecured notes payable to related parties	29,433,000		21,104,000
Total consolidated debt	326,700,000
Weighted average interest rate	5.74%
Weighted average remaining term	2 years 4 months 20 days
Asset Impairment Charges
Non-cash asset impairment of properties	0	0
Non-cash impairment charge to write off investment in unconsolidated joint venture	0	0
Goodwill
Number of reporting units	1
Goodwill, net	39,111,000		39,111,000
Revenue Recognition
Straight line rent adjustments included in rental revenues	120,000	50,000
Balance Sheet Related Disclosures
Allowance for doubtful accounts	600,000		600,000
Lease security available in security deposits	$ 1,791,000		$ 1,789,000
Income Taxes
Minimum percentage of taxable income distribution to stockholders to qualify as REIT	90.00%
Minimum percentage of gross income derived from qualifying sources to qualify as REIT	95.00%
Preferred Units of Operating Partnership
Equity
Distribution at annual percentage of liquidation preference per Preferred Unit	2.00%
Liquidation preference per Preferred Unit (in usd per share)	$ 25
Buildings and Improvements | Minimum
Balance Sheet Related Disclosures
Properties and equipment, estimated useful life	5 years
Buildings and Improvements | Maximum
Balance Sheet Related Disclosures
Properties and equipment, estimated useful life	42 years
Furniture, Fixtures and Equipment | Minimum
Balance Sheet Related Disclosures
Properties and equipment, estimated useful life	3 years
Furniture, Fixtures and Equipment | Maximum
Balance Sheet Related Disclosures
Properties and equipment, estimated useful life	7 years