Partners' Capital (Details) - USD ($)	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Partners' Capital (Details) [Line Items]
Distribution Made to Limited Partner, Cash Distributions Declared	$ 109,280	$ 101,544	$ 136,599	$ 138,034	$ 142,475	$ 142,474	$ 347,423	$ 422,983
SaleProceedsDistributionMadeToMemberOrLimitedPartner								40,404
Partners' Capital Account, Redemptions					375,681
Limited Partner [Member]
Partners' Capital (Details) [Line Items]
Distribution Made to Limited Partner, Cash Distributions Declared	106,001	98,498	132,501	134,700	$ 138,201	138,200	$ 337,000	$ 411,102
Distribution Made to Limited Partner, Distributions Declared, Per Unit (in Dollars per share)							$ 26.55	$ 31.31
Weighted Average Limited Partnership Units Outstanding, Basic (in Shares)							12,692	13,131
DistributionsPerUnitOfNetIncome (in Dollars per share)							$ 26.55	$ 31.31
DistributionsPerUnitOfReturnOfCapital (in Dollars per share)							$ 0.00	$ 0.00
SaleProceedsDistributionMadeToMemberOrLimitedPartner								$ 40,000
SaleProceedsDistributionMadeToLimitedPartnerPerUnit (in Dollars per share)								$ 3.09
Partners' Capital Account, Units, Redeemed (in Shares)					497.89			497.89
Partners' Capital Account, Redemptions					$ 371,924			$ 371,924
General Partner [Member]
Partners' Capital (Details) [Line Items]
Distribution Made to Limited Partner, Cash Distributions Declared	$ 3,279	$ 3,046	$ 4,098	$ 3,334	4,274	$ 4,274	$ 10,423	11,881
SaleProceedsDistributionMadeToMemberOrLimitedPartner								404
Partners' Capital Account, Redemptions					$ 3,757			$ 3,757