Consolidated Statements of Financial Condition (USD $)	Jun. 30, 2011	Dec. 31, 2010
Equity in commodity Trading accounts:
Cash on deposit with brokers	$ 10,153,136	$ 22,388,362
Unrealized gain (loss) on open contracts	(692,259)	1,357,343
Purchased options on futures contracts (premiums paid $80,747 and $245,722, respectively)	57,997	120,263
Total due from brokers	9,518,874	23,865,968
Cash and cash equivalents on deposit	18,242,697	18,737,332
Cash on deposit with bank	19,441	16,248
Fixed income securities (cost $12,712,617 and $11,544,636, respectively)	12,691,928	11,540,784
Interest receivable	48,992	36,141
Cash on deposit with bank - Non-Trading	4,476,651	5,133,598
Prepaid expenses - Non-Trading	76,887	81,602
Total Assets	45,075,470	59,411,673
Equity in commodity Trading accounts:
Options written on futures contracts (premiums received - $24,400)	9,913
Accrued commissions	101,755	151,916
Accrued management fees	56,988	76,511
Accrued incentive fees	59,402	278,042
Accrued offering expenses	10,613	16,588
Accrued operating expenses	159,034	201,344
Redemptions payable - Trading	2,026,136	1,549,974
Accrued management fees to U.S. Bank - Non-Trading	12,776	17,492
Distribution payable - Non-Trading	328,748	1,083,908
Total liabilities	2,765,365	3,375,775
Unitholders' capital:
Unitholders' capital	42,310,105	56,035,898
Total Liabilities and Unitholders' Capital	45,075,470	59,411,673
Trading
Unitholders' capital:
Unitholders' capital	38,097,931	51,921,871
Trading \| Beneficial owners \| Class A
Unitholders' capital:
Unitholders' capital	36,742,772	49,340,822
Trading \| Beneficial owners \| Class B
Unitholders' capital:
Unitholders' capital	1,305,864	1,405,692
Trading \| Managing owner \| Class A
Unitholders' capital:
Unitholders' capital	49,295	1,175,357
Trading \| Class A
Net asset value per unit:
Net asset value per unit	$ 92.14	$ 100.64
Trading \| Class B
Net asset value per unit:
Net asset value per unit	$ 96.87	$ 104.75
LLC equity/Non-Trading
Unitholders' capital:
Unitholders' capital	4,212,174	4,114,027
Net asset value per unit:
Net asset value per unit	$ 1.85	$ 1.81
LLC equity/Non-Trading \| Participating owners
Unitholders' capital:
Unitholders' capital	630,113	737,509
LLC equity/Non-Trading \| Nonparticipating owners
Unitholders' capital:
Unitholders' capital	$ 3,582,061	$ 3,376,518

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Carrying amount as of the balance sheet date of expenditures made in advance of when the economic benefit of the cost will be realized, and which will be expensed in future periods with the passage of time or when a triggering event occurs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 10
-Article 9

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.10)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.10)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_PrepaidExpenseCurrentAndNoncurrent
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. This element is for unclassified presentations; for classified presentations there is a separate and distinct element.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 1
-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Audit and Accounting Guide (AAG)
-Number AAG-BRD
-Chapter 4
-Paragraph 80
-Subparagraph Exhibit 4-8, 3
-IssueDate 2006-05-01
-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.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.1)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_RestrictedCashAndCashEquivalents
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant