Schedule III - Real Estate and Accumulated Depreciation - Schedule of Real Estate Investment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Abstract]
Balance - Beginning of Year	$ 636,576,955	$ 574,283,574	$ 444,908,976
Acquisitions	59,308,067	7,276,356	82,276,902
Improvements	65,458,396	56,417,927	48,263,233
Total Additions	124,766,463	63,694,283	130,540,135
Deletions	(2,856,393)	(1,400,902)	(1,165,537)
Balance - End of Year	$ 758,487,025	$ 636,576,955	$ 574,283,574