CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash Flows from Operating Activities
Net income	$ 7,586,325	$ 6,494,181
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	3,377,814	2,571,170
Amortization	1,707,436	1,091,833
Amortization from financing and credit facility costs	170,105	58,779
Stock-based compensation	708,030	523,955
Loss on extinguishment of debt	0	179,867
(Gain) loss on sale of assets	0	(79,104)
(Increase) decrease in accounts receivable	(388,837)	(415,399)
(Increase) decrease in other assets	262,383	(826,915)
Increase (decrease) in accounts payable	2,202,807	(236,711)
Increase (decrease) in deferred revenue	(115,845)	(115,845)
Increase (decrease) in accrued interest	1,014,726	(89,380)
Increase (decrease) in tenant deposits	10,000	0
Net Cash Provided by Operating Activities	16,534,944	9,156,431
Cash Flows from Investing Activities
Acquisition of real estate investments	(33,486,435)	(60,262,740)
Development of real estate investments and other (including capitalized interest of $7,269 in 2016 and $1,001 in 2015)	(6,202,814)	(272,324)
Payment of leasing costs	(39,428)	0
Net proceeds from sale of assets	0	975,636
Net Cash Used In Investing Activities	(39,728,677)	(59,559,428)
Cash Flows from Financing Activities
Proceeds from common stock offerings, net	1,991,840	(94,633)
Repurchase of common shares	(703,053)	0
Unsecured revolving credit facility borrowings	42,000,000	64,500,000
Payments of mortgage notes payable	(9,300,179)	(3,082,805)
Dividends paid	(9,596,345)	(7,892,976)
Limited partners' distributions paid	(161,643)	(156,429)
Debt extinguishment costs	0	(150,084)
Repayments of payables for capital expenditures	0	(200,300)
Payments for financing costs	(37,102)	0
Net Cash Provided by Financing Activities	24,193,518	52,922,773
Net Increase (Decrease) in Cash and Cash Equivalents	999,785	2,519,776
Cash and Cash Equivalents, beginning of period	2,711,588	5,399,458
Cash and Cash Equivalents, end of period	3,711,373	7,919,234
Supplemental Disclosure of Cash Flow Information
Cash paid for interest (net of amounts capitalized)	2,484,494	2,367,949
Supplemental Disclosure of Non-Cash Investing and Financing Activities
Shares issued under equity incentive plans	3,059,018	2,463,751
Dividends and limited partners' distributions declared and unpaid	9,812,376	8,077,605
Real estate investment financed with accounts payable	$ 27,952	$ 24,452