Summary of Significant Accounting Policies (Details) (USD $)	2 Months Ended	12 Months Ended
	Feb. 28, 2012 Class	Dec. 31, 2014 Class	Dec. 31, 2013	Dec. 31, 2012	Mar. 01, 2009
Schedule of Equity Method Investments [Line Items]
Partnership payments to Ceres for general partner administrative fee, rate by investment, monthly basis (in hundredths)		0.0833%
Partnership payments to Ceres for general partner administrative fee, rate by investment, annual basis (in hundredths)		1.00%
Applicable rate payable by each limited partner to placement agent [Abstract]
Partnership payments to Ceres for administrative fee, rate by investment, monthly basis (in hundredths)		0.0333%
Partnership payments to Ceres for administrative fee, rate by investment, annual basis (in hundredths)		0.40%
Number of share classes	4	2
Initial offer price per capital units (in dollars per unit)	$ 1,000
Minimum partnership subscription amount		$ 25,000
Incremental additional subscriptions		10,000
Limited partners unit that can be redeemed (in hundredths)		100.00%
Minimum investment to be maintained by investor (in units)		3
Period to pay all redemptions		10 days
Units outstanding by share class [Roll Forward]
Provision for income tax		0
Uncertain tax positions requiring recognition		0	0
General Partner [Member]
Units outstanding by share class [Roll Forward]
Notice period to terminate partnership		60 days
ERISA/IRA Investors [Member]
Applicable rate payable by each limited partner to placement agent [Abstract]
Minimum partnership subscription amount		10,000
Capital Unit, Class A [Member]
Applicable rate payable by each limited partner to placement agent [Abstract]
Placement agent fee rate, monthly basis (in hundredths)		0.167%
Placement agent fee rate, annualized basis (in hundredths)		2.00%
Units outstanding by share class [Roll Forward]
Units, beginning of period (in units)	34,210.600	16,259.279	23,931.981	34,210.600
Subscriptions (in units)		28.034	39.366	519.393
Redemptions (in units)		(6,574.588)	(7,712.068)	(10,798.012)
Units, end of period (in units)		9,712.725	16,259.279	23,931.981
Capital Unit, Class A [Member] | Maximum [Member]
Applicable rate payable by each limited partner to placement agent [Abstract]
Aggregate Investment		4,999,999
Capital Unit, Class B [Member]
Applicable rate payable by each limited partner to placement agent [Abstract]
Placement agent fee rate, monthly basis (in hundredths)		0.125%
Placement agent fee rate, annualized basis (in hundredths)		1.50%
Units outstanding by share class [Roll Forward]
Units, beginning of period (in units)	6,075.289	3,198.746	4,141.422	6,075.289
Subscriptions (in units)		0	0	126.801
Redemptions (in units)		(1,553.676)	(942.676)	(2,060.668)
Units, end of period (in units)		1,645.070	3,198.746	4,141.422
Capital Unit, Class B [Member] | Minimum [Member]
Applicable rate payable by each limited partner to placement agent [Abstract]
Aggregate Investment		250,000
Capital Unit, Class B [Member] | Maximum [Member]
Applicable rate payable by each limited partner to placement agent [Abstract]
Aggregate Investment		499,999
Capital Unit Class C [Member]
Applicable rate payable by each limited partner to placement agent [Abstract]
Placement agent fee rate, monthly basis (in hundredths)		0.083%
Placement agent fee rate, annualized basis (in hundredths)		1.00%
Units outstanding by share class [Roll Forward]
Units, beginning of period (in units)	9,546.728	4,166.314	7,860.274	9,546.728
Subscriptions (in units)		0	0	0
Redemptions (in units)		(2,126.464)	(3,693.960)	(1,686.454)
Units, end of period (in units)		2,039.850	4,166.314	7,860.274
Capital Unit Class C [Member] | Minimum [Member]
Applicable rate payable by each limited partner to placement agent [Abstract]
Aggregate Investment		500,000
Capital Unit Class C [Member] | Maximum [Member]
Applicable rate payable by each limited partner to placement agent [Abstract]
Aggregate Investment		4,999,999
Capital Unit Class D [Member]
Applicable rate payable by each limited partner to placement agent [Abstract]
Placement agent fee rate, monthly basis (in hundredths)		0.063%
Placement agent fee rate, annualized basis (in hundredths)		0.75%
Initial offer price per capital units (in dollars per unit)					$ 1,137
Units outstanding by share class [Roll Forward]
Units, beginning of period (in units)	59.829	0	23.012	59.829
Subscriptions (in units)		0	0	0
Redemptions (in units)		0	(23.012)	(36.817)
Units, end of period (in units)		0	0	23.012
Capital Unit Class D [Member] | Minimum [Member]
Applicable rate payable by each limited partner to placement agent [Abstract]
Aggregate Investment		$ 5,000,000
Capital Unit Class Z [Member]
Applicable rate payable by each limited partner to placement agent [Abstract]
Aggregate Investment		All
Placement agent fee rate, monthly basis (in hundredths)		0.00%
Placement agent fee rate, annualized basis (in hundredths)		0.00%
Units outstanding by share class [Roll Forward]
Units, beginning of period (in units)	957.352	405.437	483.374	957.352
Subscriptions (in units)		0	22.063	0
Redemptions (in units)		(259.478)	(100.000)	(473.978)
Units, end of period (in units)		145.959	405.437	483.374