Debt - Schedule of Fixed Rate Mortgage Notes Payable (Details) - USD ($)		Mar. 31, 2018	Sep. 30, 2017
Debt Disclosure [Abstract]
Fixed Rate Mortgage Notes Payable		$ 639,836,890	$ 598,962,567
Debt Issuance Costs		10,987,585	10,597,083
Accumulated Amortization of Debt Issuance Costs		(3,201,928)	(2,998,887)
Unamortized Debt Issuance Costs		7,785,657	7,598,196
Fixed Rate Mortgage Notes Payable, net of Unamortized Debt Issuance Costs		$ 632,051,233	$ 591,364,371
Weighted Average Interest Rate	[1]	4.11%	4.18%

[1] Weighted average interest rate excludes amortization of debt issuance costs.