CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash Flows from Operating Activities
Net income	$ 4,741,835	$ 4,700,059
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	1,449,778	1,498,761
Amortization	353,718	192,053
Stock-based compensation	412,000	359,357
Gain on sale of assets	(908,160)
(Increase) decrease in accounts receivable	197,360	(575,543)
(Increase) decrease in other assets	(288,822)	97,815
(Decrease) increase in accounts payable	(1,756,591)	(77,156)
Decrease in deferred revenue	(115,845)	(172,387)
Increase (decrease) in accrued interest	(260,676)	29,247
Decrease in tenant deposits	(1,400)
Net Cash Provided By Operating Activities	3,823,197	6,052,206
Cash Flows from Investing Activities
Acquisition of real estate investments	(9,726,161)	(2,925,411)
Payment of leasing costs	(625)	(1,250)
Net proceeds from sale of assets	627,118	6,522,821
Net Cash Provided or (Used) in Investing Activities	(9,099,668)	3,596,160
Cash Flows from Financing Activities
Proceeds from issuance of common stock	35,042,235
Payments of mortgages payable	(739,776)	(1,751,956)
Line-of-credit borrowings	13,943,606	9,221,420
Line of credit repayments	(40,002,806)	(11,471,420)
Dividends and limited partners' distributions paid	(4,079,813)	(5,154,374)
Repayments of capital expenditure payables	(424,321)	(286,078)
Net Cash Used in Financing Activities	3,739,125	(9,442,408)
Net Increase (Decrease) in Cash and Cash Equivalents	(1,537,346)	205,958
Cash and Cash Equivalents, beginning of period	2,002,663	593,281
Cash and Cash Equivalents, end of period	465,317	799,239
Supplemental Disclosure of Cash Flow Information
Cash paid for interest (net of amounts capitalized)	1,282,681	1,205,946
Supplemental Disclosure of Non-Cash Investing and Financing Activities
Shares issued under Stock Incentive Plan	2,166,270	2,168,498
Dividends and limited partners' distributions declared and unpaid	4,697,001	4,065,134
Real estate investments financed with accounts payable	54,321	239,260
Forgiveness of mortgage debt	$ 9,173,789