Statements of Income and Expenses and Changes in Partners' Capital (Unaudited) (Parenthetical)	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Statements of Income and Expense and Changes in Partners' Capital
Partner's capital, units outstanding	13,398.1581	14,809.0156	13,398.1581	14,809.0156

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