Condensed Statements of Financial Condition (Parenthetical) - shares	Mar. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
General Partner: units issued (in shares)	100,000	100,000
General Partner: units outstanding (in shares)	100,000	100,000
Limited partners: units issued (in shares)	96,373,204	96,552,190
Limited partners: units outstanding (in shares)	96,373,204	96,552,190