Fair Value of Financial Instruments - Summary of Fair Value of Partnership's Financial Liabilities (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Mortgages payable and other secured financing	$ 26,275,890	$ 26,802,246
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt financing and lines of credit	679,091,701	549,397,421
Mortgages payable and other secured financing	26,275,890	26,802,246
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Debt financing and lines of credit	711,968,025	568,193,494
Mortgages payable and other secured financing	$ 26,277,618	$ 26,812,851