STATEMENTS OF FINANCIAL CONDITION (Unaudited) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Trading Equity:
Unrestricted cash	$ 134,006,794	$ 171,164,335
Restricted cash	25,385,047	27,192,268
Total cash	159,391,841	198,356,603
Net unrealized gain (loss) on open contracts	177,506	2,551,354
Total Trading Equity	159,569,347	200,907,957
Interest receivable (MS&Co.)	1,218	6,032
Total Assets	159,570,565	200,913,989
Liabilities:
Redemptions payable	3,090,138	3,642,807
Accrued brokerage fees (MS&Co.)	809,389	994,527
Accrued management fees	243,109	302,574
Total Liabilities	4,142,636	4,939,908
Partners' Capital:
Limited Partners (5,941,705.692 and 6,979,883.723 Units, respectively)	153,597,189	193,760,270
General Partner (70,819.769 and 79,748.769 Units, respectively)	1,830,740	2,213,811
Total Partners' Capital	155,427,929	195,974,081
Total Liabilities and Partners' Capital	159,570,565	200,913,989
NET ASSET VALUE PER UNIT (in dollars per unit)	$ 25.85	$ 27.76
MS&Co. [Member]
Trading Equity:
Net unrealized gain (loss) on open contracts	177,506	3,072,667
MSIP [Member]
Trading Equity:
Net unrealized gain (loss) on open contracts	$ 0	$ (521,313)