Nature of Business and Significant Accounting Policies (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) class	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Assets allocated to GP 3, GP 6 and GP 15	$ 0		$ 0		$ 0
Classes of interests
Number of classes of limited partner interests | class			7
Income taxes
Income taxes	0	$ 0	$ 0	$ 0
Debt
Debt carried by partners	0	$ 0	0	$ 0
General Partner
Organization and offering costs
Unreimbursed organization and offering costs	245,000		245,000		91,000
Swap Contracts | Deutsche Bank Total Return Swap
Swap contracts
Notional value	60,638,617		60,638,617		60,638,617
Cash margin balance	$ 13,993,000		$ 13,993,000		$ 12,996,500
Swap Contracts | Deutsche Bank Total Return Swap Terminating July 1, 2020
Swap contracts
Term of total return swap			5 years
Swap Contracts | Deutsche Bank Total Return Swap Terminating March 29, 2019
Swap contracts
Term of total return swap			3 years