Partners' Capital (Details) - USD ($)	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Partners' Capital (Details) [Line Items]
Distribution Made to Limited Partner, Cash Distributions Declared	$ 198,178	$ 198,178	$ 198,186	$ 198,181	$ 198,181	$ 198,180	$ 594,542	$ 594,542
Sale Proceeds Distribution Made To Member Or Limited Partner							64,513	197,980
Partners' Capital Account, Redemptions		48,537			188,845
Limited Partner [Member]
Partners' Capital (Details) [Line Items]
Distribution Made to Limited Partner, Cash Distributions Declared	196,197	$ 196,196	196,204	196,199	$ 196,199	196,198	$ 588,597	$ 588,596
Distribution Made to Limited Partner, Distributions Declared, Per Unit (in Dollars per share)							$ 30.52	$ 30.23
Weighted Average Limited Partnership Units Outstanding, Basic (in Shares)							19,286	19,473
DistributionsPerUnitOfNetIncome (in Dollars per share)							$ 9.52	$ 2.25
DistributionsPerUnitOfReturnOfCapital (in Dollars per share)							$ 21.00	$ 27.98
Sale Proceeds Distribution Made To Member Or Limited Partner							$ 63,868	$ 196,000
SaleProceedsDistributionMadetoLimitedPartnerPerUnit (in Dollars per share)							$ 3.32	$ 10.10
Partners' Capital Account, Units, Redeemed (in Shares)		64.66			213.34		64.66	213.34
Partners' Capital Account, Redemptions		$ 48,051			$ 186,957		$ 48,051	$ 186,957
General Partner [Member]
Partners' Capital (Details) [Line Items]
Distribution Made to Limited Partner, Cash Distributions Declared	$ 1,981	1,982	$ 1,982	$ 1,982	1,982	$ 1,982	5,945	5,946
Sale Proceeds Distribution Made To Member Or Limited Partner							645	1,980
Partners' Capital Account, Redemptions		$ 486			$ 1,888		$ 486	$ 1,888