Consolidated Statements of Cash Flows (USD $)	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash Flows From Operating Activities
Net income	$ 6,668,049	$ 18,940,508
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	4,538,498	4,333,591
Amortization	811,292	266,258
Stock-based compensation	1,041,762	864,000
Impairment charge	13,500,000
Gain on extinguishment of debt	(2,360,231)
Gain on sale of asset		(5,328,333)
(Increase) Decrease in accounts receivable	(1,339,377)	1,191,299
(Increase) Decrease in other assets	81,064	(728,226)
(Increase) Decrease in accounts payable	205,451	(705,142)
Decrease in deferred revenue	(6,835,746)	(517,162)
Increase (Decrease) in accrued interest	253,275	785
Increase (Decrease) in tenant deposits	12,832	(13,483)
Net Cash Provided By Operating Activities	16,576,869	18,304,095
Cash Flows From Investing Activities
Acquisition of real estate investments (including capitalized interest of $-0- in 2011 and $288,477 in 2010)	(20,525,240)	(21,051,638)
Proceeds from sale of asset	6,522,821	9,761,445
Payments of leasing costs	(150,597)	(87,797)
Net Cash Used In Investing Activities	(14,153,016)	(11,377,990)
Cash Flows From Financing Activities
Proceeds from common stock offering		31,072,752
Payments of mortgages payable	(3,459,816)	(2,993,427)
Dividends and limited partners' distributions paid	(13,318,319)	(13,901,489)
Line-of-credit borrowings	45,107,904	21,889,051
Line-of-credit (repayments)	(30,103,254)	(42,991,654)
Repayments of capital expenditure payables	(286,078)	(352,430)
Payments of financing costs	(70,784)	(649)
Net Cash Used In Financing Activities	(2,130,347)	(7,277,846)
Net Decrease In Cash and Cash Equivalents	293,506	(351,741)
Cash and Cash Equivalents, beginning of period	593,281	688,675
Cash and Cash Equivalents, end of period	886,787	336,934
Supplemental Disclosure of Cash Flow Information
Cash paid for interest (net of amounts capitalized)	3,447,396	3,293,412
Supplemental Disclosure of Non-Cash Transactions
Dividends and limited partners' distributions declared and unpaid	4,068,677	5,143,682
Real estate investments financed with accounts payable	$ 54,321	$ 975,803