Condensed Statements of Financial Condition (Parenthetical) - shares	Sep. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
General Partner: units issued (in shares)	100,000	100,000
General Partner: units outstanding	100,000	100,000
Limited partners: units issued (in shares)	94,716,915	99,944,485
Limited partners: units outstanding (in shares)	94,716,915	99,944,485