Restricted and Unrestricted Cash	9 Months Ended
Restricted and Unrestricted Cash	Sep. 30, 2011
Restricted and Unrestricted Cash [Abstract]
Restricted and Unrestricted Cash	8. Restricted and Unrestricted Cash As reflected on the Partnership's Statements of Financial Condition, restricted cash equals the cash portion of assets on deposit to meet margin requirements plus the cash required to offset unrealized losses on foreign currency forwards and options and offset losses on only offset LME positions. All of these amounts are maintained separately. Cash that is not classified as restricted cash is therefore classified as unrestricted cash.

The entire disclosure for cash and cash equivalent footnotes, which may include the types of deposits and money market instruments, applicable carrying amounts, restricted amounts and compensating balance arrangements. Cash and equivalents include: (1) currency on hand (2) demand deposits with banks or financial institutions (3) other kinds of accounts that have the general characteristics of demand deposits (4) short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments maturing within three months from the date of acquisition qualify.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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