Annual report pursuant to Section 13 and 15(d)

SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT - Supplemental Cash Flow Information (Details)

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SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT - Supplemental Cash Flow Information (Details) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Condensed Cash Flow Statements, Captions [Line Items]      
Interest paid $ 12,900,901 $ 7,873,333 $ 2,762,903
Income taxes paid (net of refunds) 37,736 747,406 3,260,576
Change in accounts payable and accrued expenses related to acquisition expenditures 0 (614,880) 270,615
Change in accounts payable and accrued expenses related to the issuance of common equity 0 (72,685) 72,685
Change in accounts payable and accrued expenses related to debt financing costs 0 (43,039) (176,961)
Reinvestment of distributions by common stockholders in additional common shares 815,889 817,915 140,108
Parent Company [Member]      
Condensed Cash Flow Statements, Captions [Line Items]      
Interest paid 11,335,654 5,254,591 0
Income taxes paid (net of refunds) 0 314,728 192,938
Change in accounts payable and accrued expenses related to acquisition expenditures 0 0 (344,065)
Change in accounts payable and accrued expenses related to the issuance of common equity 0 (72,685) 72,685
Change in accounts payable and accrued expenses related to debt financing costs 0 (30,607) (176,961)
Reinvestment of distributions by common stockholders in additional common shares $ 815,889 $ 817,915 $ 140,108