CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash Flows from Operating Activities
Net income	$ 9,831,826	$ 8,523,393
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	2,913,540	2,987,351
Amortization	849,665	387,317
Stock-based compensation	824,000	718,714
Gain on sale of assets	(2,067,467)	0
(Increase) decrease in accounts receivable	40,492	(1,340,828)
(Increase) decrease in other assets	(1,316,173)	109,001
(Decrease) increase in accounts payable	(1,826,965)	211,558
Decrease in deferred revenue	(231,690)	(344,775)
Increase (decrease) in accrued interest	(253,140)	52,063
Decrease in tenant deposits	(3,103)	3,167
Net Cash Provided by (Used In) Operating Activities	8,760,985	11,306,961
Cash Flows from Investing Activities
Acquisition of real estate investments	(25,573,379)	(4,223,710)
Payment of leasing costs	(14,241)	(36,756)
Net proceeds from sale of assets	6,539,547	6,522,821
Increase in restricted cash	(3,280,534)	0
Net Cash Provided by (Used In) Investing Activities	(22,328,607)	2,262,355
Cash Flows from Financing Activities
Proceeds from common stock offering	35,042,235	0
Line-of-credit borrowings	35,064,017	16,905,045
Line-of-credit repayments	(47,073,509)	(17,956,395)
Payments of mortgages payable	(1,526,510)	(2,725,931)
Dividends and limited partners' distributions paid	(8,793,066)	(9,236,347)
Repayments of payables for capital expenditures	(424,321)	(286,078)
Payments for financing costs	(105,399)	(11,034)
Net Cash Provided by (Used In) Financing Activities	12,183,447	(13,310,740)
Net Increase (Decrease) in Cash and Cash Equivalents	(1,384,175)	258,576
Cash and Cash Equivalents, beginning of period	2,002,663	593,281
Cash and Cash Equivalents, end of period	618,488	851,857
Supplemental Disclosure of Cash Flow Information
Cash paid for interest (net of amounts capitalized)	2,270,458	2,333,130
Supplemental Disclosure of Non-Cash Investing and Financing Activities
Shares issued under Stock Incentive Plan	2,175,831	2,168,498
Dividends and limited partners' distributions declared and unpaid	4,715,306	4,075,324
Real estate investments financed with accounts payable	35,045	456,162
Forgiveness of mortgage debt	9,173,789	0
Real estate acquisitions financed with debt assumption	$ 9,640,528	$ 0