Condensed Statements of Financial Condition (unaudited) (Parenthetical) - shares	Sep. 30, 2015	Dec. 31, 2014
Partners’ capital:
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)	97,672,578	100,656,999
Limited partners: units outstanding (in shares)	97,672,578	100,656,999