Interest Rate Derivatives - Summary of Partnership's Interest Rate Derivatives (Details) - USD ($)		3 Months Ended	12 Months Ended
		Mar. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Derivative, Fair Value - Asset (Liability)		$ 36,112	$ 10,911
Wells Fargo Bank [Member]
Derivative [Line Items]
Derivative, Purchase Date		2015-07	2015-07
Derivative, Notional Amount		$ 26,949,233	$ 27,033,788
Derivative, Maturity Date		2020-08	2020-08
Derivative, Effective Capped Rate	[1]	3.00%	3.00%
Derivative, Index		SIFMA	SIFMA
Derivative, Variable Debt Financing Facility Hedged	[1]	TOB Trusts	TOB Trusts
Royal Bank of Canada-1 [Member]
Derivative [Line Items]
Derivative, Purchase Date		2015-07	2015-07
Derivative, Notional Amount		$ 26,949,233	$ 27,033,788
Derivative, Maturity Date		2020-08	2020-08
Derivative, Effective Capped Rate	[1]	3.00%	3.00%
Derivative, Index		SIFMA	SIFMA
Derivative, Variable Debt Financing Facility Hedged	[1]	TOB Trusts	TOB Trusts
SMBC Capital Markets, Inc-1 [Member]
Derivative [Line Items]
Derivative, Purchase Date		2015-07	2015-07
Derivative, Notional Amount		$ 26,949,233	$ 27,033,788
Derivative, Maturity Date		2020-08	2020-08
Derivative, Effective Capped Rate	[1]	3.00%	3.00%
Derivative, Index		SIFMA	SIFMA
Derivative, Variable Debt Financing Facility Hedged	[1]	TOB Trusts	TOB Trusts
Barclays Bank PLC 1 [Member]
Derivative [Line Items]
Derivative, Purchase Date		2017-06	2017-06
Derivative, Notional Amount		$ 80,847,700	$ 81,101,364
Derivative, Maturity Date		2020-08	2020-08
Derivative, Effective Capped Rate	[1]	1.50%	1.50%
Derivative, Index		SIFMA	SIFMA
Derivative, Variable Debt Financing Facility Hedged	[1]	TOB Trusts	TOB Trusts
Derivative, Fair Value - Asset (Liability)			$ 4,090
Barclays Bank PLC 3 [Member]
Derivative [Line Items]
Derivative, Purchase Date		2019-08	2019-08
Derivative, Notional Amount		$ 79,014,909	$ 79,333,280
Derivative, Maturity Date		2024-08	2024-08
Derivative, Effective Capped Rate	[1]	4.50%	4.50%
Derivative, Index		SIFMA	SIFMA
Derivative, Variable Debt Financing Facility Hedged	[1]	M31 TEBS	M31 TEBS
Derivative, Fair Value - Asset (Liability)		$ 36,112	$ 6,821
Barclays Bank PLC 2 [Member]
Derivative [Line Items]
Derivative, Purchase Date		2017-09	2017-09
Derivative, Notional Amount		$ 57,918,000	$ 58,090,000
Derivative, Maturity Date		2020-09	2020-09
Derivative, Effective Capped Rate	[1]	4.00%	4.00%
Derivative, Index		SIFMA	SIFMA
Derivative, Variable Debt Financing Facility Hedged	[1]	TOB Trusts	TOB Trusts

[1] See Note 22 for additional details.