Ceres Tactical Commodity 10-K 30 Mar 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2014	Feb. 28, 2015	Jun. 30, 2014
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Trading Symbol	ck0001325676
Entity Registrant Name	MANAGED FUTURES PREMIER AVENTIS II L.P.
Entity Central Index Key	1325676
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		144,175.88
Entity Public Float			$218,773,418

Statements_of_Financial_Condit

Statements of Financial Condition (USD $)	Dec. 31, 2014	Dec. 31, 2013
Assets:
Investment in Master, at fair value (Note 1)	$209,288,768	$266,266,592
Cash (Note 3c)	172,531	29,913
Total assets	209,461,299	266,296,505
Accrued expenses:
Ongoing selling agent fees (Note 3c)	349,102	832,177
Management fees (Note 3b)	217,637	331,790
Administrative fees (Note 3a)	174,110	110,597
Professional fees	161,115	19,660
Other	19,569	12,918
Redemptions payable (Note 5)	5,664,407	5,266,061
Total liabilities	6,585,940	6,573,203
Partners' Capital: (Notes 1 and 5)
General Partner, 1,648.4455 and 2,098.5145 unit equivalents outstanding at December 31, 2014 and 2013, respectively	2,304,961	3,038,670
Limited Partners, 143,442.4917 and 177,267.3287 Redeemable Units outstanding at December 31, 2014 and 2013, respectively	200,570,398	256,684,632
Total partners' capital	202,875,359	259,723,302
Total liabilities and partners' capital	$209,461,299	$266,296,505
Net asset value per unit	1,398.26	1,448.01

Statements_of_Financial_Condit1

Statements of Financial Condition (Parenthetical)	Dec. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
General Partner, unit equivalents outstanding	1,648.45	2,098.51
Limited Partners, Redeemable Units outstanding	143,442.49	177,267.33

Statements_of_Income_and_Expen

Statements of Income and Expenses (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Investment Income:
Interest income allocated from Master (Note 3c)	$34,622		$78,603		$146,336
Expenses:
Expenses allocated from Master	4,139,981		4,362,862		1,118,121
Ongoing selling agent fees (Note 3c)	6,292,054		10,101,692		11,349,994
Management fees (Note 3b)	2,985,158		3,902,950		6,031,187
Administrative fees (Note 3a)	1,420,466		1,342,201		1,507,798
Professional fees	349,287		196,709		108,892
Other	97,486		83,452		65,653
Total expenses	15,284,432		19,989,866		20,181,645
Net investment income (loss)	-15,249,810		-19,911,263		-20,035,309
Trading Results:
Net realized gains (losses) on closed contracts allocated from Master	6,751,678		7,387,671		35,243,202
Change in net unrealized gains (losses) on open contracts allocated from Master	-187,312		4,567,565		5,671,977
Total trading results allocated from Master	6,564,366		11,955,236		40,915,179
Net income (loss)	($8,685,444)		($7,956,027)		$20,879,870
Net income (loss) per unit (Note 6)	($49.75)	[1]	($43.18)	[1]	$100.25	[1]
Weighted average units outstanding	162,465.69		184,840.31		200,183.18
[1]	Based on change in net asset value per unit.

Statements_of_Changes_in_Partn

Statements of Changes in Partners' Capital (USD $)	Total	Limited Partners [Member]	Special Limited Partner [Member]	General Partner [Member]
Beginning balance at Dec. 31, 2011	$285,726,309	$280,930,294	$1,113,833	$3,682,182
Net income (loss) available for pro rata distribution	20,879,870	20,551,754	80,278	247,838
Subscriptions of 14,147,1525, 40,735.2062 and 10,331.2640 for the period ending 2012, 2013 and 2014 respectively, Redeemable Units	21,273,577	21,273,577
Redemptions of Redeemable Units 32,440.6716, 47,145.8740 and 44,156.1010 for the year ending 2012, 2013 and 2014, General Partner unit equivalents 548.7470 and 450.0690 for the year ending 2012 and 2014 and Redeemable Units of Special Limited Partner Interest 800.7772 for the year ending 2013 respectively	-49,658,008	-48,857,272		-800,736
Net asset value per unit	1,491.19
Ending balance at Dec. 31, 2012	278,221,748	273,898,353	1,194,111	3,129,284
Net income (loss) available for pro rata distribution	-7,956,027	-7,865,413		-90,614
Subscriptions of 14,147,1525, 40,735.2062 and 10,331.2640 for the period ending 2012, 2013 and 2014 respectively, Redeemable Units	59,560,140	59,560,140
Redemptions of Redeemable Units 32,440.6716, 47,145.8740 and 44,156.1010 for the year ending 2012, 2013 and 2014, General Partner unit equivalents 548.7470 and 450.0690 for the year ending 2012 and 2014 and Redeemable Units of Special Limited Partner Interest 800.7772 for the year ending 2013 respectively	-70,102,559	-68,908,448	-1,194,111
Net asset value per unit	1,448.01
Ending balance at Dec. 31, 2013	259,723,302	256,684,632		3,038,670
Net income (loss) available for pro rata distribution	-8,685,444	-8,601,827		-83,617
Subscriptions of 14,147,1525, 40,735.2062 and 10,331.2640 for the period ending 2012, 2013 and 2014 respectively, Redeemable Units	14,734,486	14,734,486
Redemptions of Redeemable Units 32,440.6716, 47,145.8740 and 44,156.1010 for the year ending 2012, 2013 and 2014, General Partner unit equivalents 548.7470 and 450.0690 for the year ending 2012 and 2014 and Redeemable Units of Special Limited Partner Interest 800.7772 for the year ending 2013 respectively	-62,896,985	-62,246,893		-650,092
Net asset value per unit	1,398.26
Ending balance at Dec. 31, 2014	$202,875,359	$200,570,398		$2,304,961

Statements_of_Changes_in_Partn1

Statements of Changes in Partners' Capital (Parenthetical)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Subscriptions of Redeemable Units	10,331.26	40,735.21	14,147.15
Redemptions of Redeemable Units	44,156.10	47,145.87	32,440.67
General Partner [Member]
Redemptions of Redeemable Units	450.069	800.7772	548.747

Partnership_Organization

Partnership Organization	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Partnership Organization	1	Partnership Organization:
	Managed Futures Premier Aventis II L.P. (formerly known as Bristol Energy Fund L.P.) (the “Partnership”) is a limited partnership organized on April 20, 2005 under the partnership laws of the State of New York to engage, directly or indirectly, in the speculative trading of commodity interests on U.S. and international futures, options on futures and forward markets. The Partnership may also engage, directly or indirectly, in swap transactions and other derivative transactions with the approval of the General Partner (defined below). Initially, the Partnership’s investment strategy focused on energy and energy-related investments. While the Partnership is expected to continue to have significant exposure to energy and energy-related markets, such trading will no longer be the Partnership’s primary focus. Therefore, the Partnership’s past trading performance will not necessarily be indicative of future results. The commodity interests that are traded by the Partnership, through its investment in MB Master Fund L.P. (“MB Master”), are volatile and involve a high degree of market risk. During the initial offering period, the Partnership sold 11,925 redeemable units of limited partnership interest (“Redeemable Units”). The Partnership commenced trading on September 6, 2005. The Partnership privately and continously offers Redeemable Units to qualified investors. There is no maximum number of Redeemable Units that may be sold by the Partnership.
	Ceres Managed Futures LLC, a Delaware limited liability company, acts as the general partner (the “General Partner”) and commodity pool operator of the Partnership. The General Partner is wholly owned by Morgan Stanley Smith Barney Holdings LLC (“MSSB Holdings”). MSSB Holdings is ultimately owned by Morgan Stanley. Morgan Stanley is a publicly held company whose shares are listed on the New York Stock Exchange. Morgan Stanley is engaged in various financial services and other businesses. Prior to June 28, 2013, Morgan Stanley indirectly owned a majority equity interest in MSSB Holdings, and Citigroup Inc. indirectly owned a minority equity interest in MSSB Holdings. Prior to July 31, 2009, the date as of which MSSB Holdings became its owner, the General Partner was wholly owned by Citigroup Financial Products Inc., a wholly owned subsidiary of Citigroup Global Markets Holdings Inc., the sole owner of which is Citigroup Inc. As of December 31, 2014, all trading decisions for the Partnership were made by the Advisor (defined below).
	During the year ended December 31, 2014, the Partnership’s/Master’s commodity broker was Morgan Stanley & Co. LLC (“MS&Co.”), a registered futures commission merchant. During prior periods included in this report, Citigroup Global Markets Inc. (“CGM”) also served as a commodity broker.
	On December 1, 2005, the Partnership allocated substantially all of its capital to CMF SandRidge Master Fund L.P. (“SandRidge Master”), a limited partnership organized under the partnership laws of the State of New York. The Partnership purchased 14,410.6191 units of SandRidge Master with cash equal to $14,477,858 and a contribution of open commodity futures and option contracts with a fair value of $(16,018). SandRidge Master permitted commodity pools managed by SandRidge Capital, L.P. (“SandRidge”) using its Energy Program, a proprietary, discretionary trading system, to invest together in one trading vehicle. On January 31, 2013, the Partnership fully redeemed its investment in SandRidge Master for cash equal to $280,445,995.
	On February 1, 2013, the Partnership allocated substantially all of its capital to MB Master, a limited partnership organized under the partnership laws of the State of Delaware. The Partnership purchased an interest in MB Master with cash equal to $262,944,186. MB Master permits accounts managed by Aventis Asset Management, LLC (“Aventis”) using its Aventis Diversified Commodity Strategy, a proprietary, discretionary trading system, to invest together in one trading vehicle. References to the “Master” herein refer to SandRidge Master and/or MB Master, as applicable, and references to the “Advisor” herein refer to SandRidge and/or Aventis, as applicable. In addition, SandRidge was a special limited partner (“Special Limited Partner”) of the Partnership. The General Partner is also the general partner of the Master. Individual and pooled accounts currently managed by the Advisor, including the Partnership, are permitted to be limited partners of the Master. The General Partner and the Advisor believe that trading through this structure should promote efficiency and economy in the trading process.
	The financial statements of the Master, including the Condensed Schedules of Investments, are contained elsewhere in this report and should be read together with the Partnership’s financial statements.
	At December 31, 2014 and 2013, the Partnership owned approximately 91.7% and 85.4%, respectively, of the Master. During the periods covered by the report, the performance of the Partnership was directly affected by the performance of the Master. Expenses to investors as a result of the investment in the Master were approximately the same and redemption rights were not affected.
	The General Partner and each limited partner share in the profits and losses of the Partnership, after the allocation to the Special Limited Partner, in proportion to the amount of Partnership interest owned by each, except that no limited partner is liable for obligations of the Partnership in excess of its capital contribution and profits, if any, net of distributions and losses, if any.
	The Partnership will be liquidated upon the first to occur of the following: December 31, 2055; the net asset value per Redeemable Unit decreases to less than $400 as of a close of any business day; or under certain other circumstances as defined in the Limited Partnership Agreement of the Partnership (the “Limited Partnership Agreement”). In addition, the General Partner may, in its sole discretion, cause the Partnership to dissolve if the Partnership’s aggregate net assets decline to less than $1,000,000.

Accounting_Policies

Accounting Policies	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Accounting Policies	2	Accounting Policies:
		a.	Use of Estimates.    The preparation of financial statements and accompanying notes in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires the General Partner to make estimates and assumptions that affect the reported amounts of assets and liabilities, income and expenses, and related disclosures of contingent assets and liabilities in the financial statements and accompanying notes. As a result, actual results could differ from these estimates.
		b.	Statement of Cash Flows.    The Partnership is not required to provide a Statement of Cash Flows.
		c.	Partnership’s Investments.    The Partnership’s investment in the Master is stated at fair value, which is based on (1) the Partnership’s net contribution to the Master and (2) its allocated share of the undistributed profits and losses, including realized gains/losses and the change in net unrealized gains/losses, of the Master. The Master values its investments as described in Note 2, “Accounting Policies,” on the attached Master’s financial statements.
	Partnership’s Fair Value Measurements.    Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date under current market conditions. The fair value hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to fair values derived from unobservable inputs (Level 3). The level in the fair value hierarchy within which the fair value measurement in its entirety falls shall be determined based on the lowest level input that is significant to the fair value measurement in its entirety.
	GAAP also requires the use of judgment in determining if a formerly active market has become inactive and in determining fair values when the market has become inactive. The General Partner has concluded that based on available information in the marketplace, there has not been a significant decrease in the volume and level of activity in the Partnership’s Level 2 assets and liabilities.
	The Partnership will separately present purchases, sales, issuances, and settlements in its reconciliation of Level 3 fair value measurements (i.e., to present such items on a gross basis rather than on a net basis), and make disclosures regarding the level of disaggregation and the inputs and valuation techniques used to measure fair value for measurements that fall within either Level 2 or Level 3 of the fair value hierarchy as required under GAAP.
	The Partnership values its investment in the Master with no other rights or obligations inherent within the ownership interest held by the Partnership based on the end of the day net asset value of the Master (Level 2). The value of the Partnership’s investment in the Master reflects its proportional interest in the Master. As of and for the years ended December 31, 2014 and 2013, the Partnership did not hold any derivative instruments that were based on unadjusted quoted prices in active markets for identical assets and liabilities (Level 1) or priced at fair value using unobservable inputs through the application of the General Partner’s assumptions and internal valuation pricing models (Level 3). During the years ended December 31, 2014 and 2013, there were no transfers of assets or liabilities between Level 1 and Level 2.
			December 31,		Quoted Prices in		Significant Other		Significant
			2014		Active Markets for		Observable Inputs		Unobservable
					Identical Assets		(Level 2)		Inputs
					and Liabilities				(Level 3)
					(Level 1)
	Assets
	Investment in Master		$	209,288,768	$	—	$	209,288,768	$	—
	Net fair value		$	209,288,768	$	—	$	209,288,768	$	—
			December 31,		Quoted Prices in		Significant Other		Significant
			2013		Active Markets for		Observable Inputs		Unobservable
					Identical Assets		(Level 2)		Inputs
					and Liabilities				(Level 3)
					(Level 1)
	Assets
	Investment in Master		$	266,266,592	$	—	$	266,266,592	$	—
	Net fair value		$	266,266,592	$	—	$	266,266,592	$	—
	Master’s Investments and Fair Value Measurements.    For disclosures regarding the Master’s investments and fair value measurements, see Note 2, “Accounting Policies,” on the attached Master’s financial statements.
		d.	Income Taxes.    Income taxes have not been provided as each partner is individually liable for the taxes, if any, on its share of the Partnership’s income and expenses.
	GAAP provides guidance for how uncertain tax positions should be recognized, measured, presented and disclosed in the financial statements and requires the evaluation of tax positions taken or expected to be taken in the course of preparing the Partnership’s financial statements to determine whether the tax positions are “more-likely-than-not” to be sustained by the applicable tax authority. Tax positions with respect to tax at the Partnership level not deemed to meet the “more-likely-than-not” threshold would be recorded as a tax benefit or expense in the current year. The General Partner has concluded that no provision for income tax is required in the Partnership’s financial statements.
	The Partnership files U.S. federal and various state and local tax returns. No income tax returns are currently under examination. The 2011 through 2014 tax years remain subject to examination by U.S. federal and most state tax authorities. The General Partner does not believe that there are any uncertain tax positions that require recognition of a tax liability.
		e.	Investment Company Status.    Effective January 1, 2014, the Partnership adopted Accounting Standards Update (“ASU”) 2013-08, “Financial Services — Investment Companies (Topic 946): Amendments to the Scope, Measurement and Disclosure Requirements.” ASU 2013-08 changes the approach to the investment company assessment, requires non-controlling ownership interests in other investment companies to be measured at fair value, and requires additional disclosures about the investment company’s status as an investment company. ASU 2013-08 is effective for interim and annual reporting periods beginning after December 15, 2013. The adoption of this ASU did not have a material impact on the Partnership’s financial statements. Based on the General Partner’s assessment, the Partnership has been deemed to be an investment company since inception.
		f.	Net Income (Loss) per unit.    Net income (loss) per unit is calculated in accordance with investment company guidance. See Note 6, “Financial Highlights.”
		g.	Subsequent Events.    The General Partner of the Partnership evaluates events that occur after the balance sheet date but before financial statements are issued. The General Partner has assessed the subsequent events through the date of issuance and determined that no events have occurred that require adjustments to or disclosure in the financial statements.

Agreements

Agreements	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Agreements	3	Agreements:
		a.	Limited Partnership Agreement:
	The General Partner administers the business and affairs of the Partnership, including selecting one or more advisors to make trading decisions for the Partnership. Prior to October 1, 2014, the Partnership paid the General Partner a monthly administrative fee in return for its services to the Partnership equal to 1/24 of 1% (0.5% per year) of month-end Net Assets of the Partnership. Effective October 1, 2014, the administrative fee was increased to 1/12 of 1% (1.00% per year) of month-end Net Assets of the Partnership. Month-end Net Assets, for the purpose of calculating administrative fees are Net Assets, as defined in the Limited Partnership Agreement, prior to the reduction of the current month’s management fee, incentive fee/profit share allocation accrual, the administrative fee and any redemptions or distributions as of the end of such month. This fee may be increased or decreased at the discretion of the General Partner.
		b.	Management Agreement:
	The General Partner, on behalf of the Partnership, entered into a management agreement (the “SandRidge Management Agreement”) with SandRidge, a registered commodity trading advisor. SandRidge was not affiliated with the General Partner, MS&Co. or CGM and was not responsible for the organization or operation of the Partnership. The Partnership paid SandRidge a monthly management fee equal to 1/6 of 1% (2% per year) of month-end Net Assets allocated to SandRidge. Month-end Net Assets, for the purpose of calculating management fees were Net Assets, as defined in the Limited Partnership Agreement, prior to the reduction of the current month’s management fee, profit share allocation accrual, the administrative fee and any redemptions or distributions as of the end of such month.
	In addition, the Special Limited Partner of the Partnership received a quarterly profit share allocation to its capital account in the Partnership in the form of Redeemable Units of the Partnership, the value of which was equal to 20% of the New Trading Profits, as defined in the Limited Partnership Agreement, earned on behalf of the Partnership during each calendar quarter and which were issued as Special Limited Partner unit equivalents. The SandRidge Management Agreement was terminated effective January 15, 2013.
	The General Partner, on behalf of the Partnership, entered into a management agreement (the “Aventis Management Agreement”) with Aventis, a registered commodity trading advisor. Aventis is not affiliated with the General Partner, MS&Co. or CGM and is not responsible for the organization or operation of the Partnership. Prior to March 1, 2014, the Partnership paid Aventis a monthly management fee equal to 1/12 of 1.5% (1.5% per year) of month-end Net Assets allocated to Aventis. Effective March 1, 2014, Aventis reduced the management fee rate to 1/12 of 1.25% (a 1.25% annual rate) of month-end Net Assets allocated to Aventis. Month-end Net Assets, for the purpose of calculating management fees are Net Assets, as defined in the Limited Partnership Agreement, prior to the reduction of the current month’s management fee, incentive fee, the administrative fee and any redemptions or distributions as of the end of such month.
	Aventis is not a special limited partner and does not receive a profit share allocation. Instead, Aventis will receive an incentive fee, the value of which will be equal to 20% of the New Trading Profits, as defined in the Aventis Management Agreement, earned on behalf of the Partnership during each calendar quarter.
	The Aventis Management Agreement can be terminated upon notice by either party.
	In allocating substantially all the assets of the Partnership to the Advisor, the General Partner considers the Advisor’s past performance, trading style, volatility of markets traded and fee requirements. The General Partner could modify or terminate the allocation of assets to the Advisor at any time.
		c.	Customer Agreement/Selling Agent Agreement:
	Prior to and during part of the third quarter of 2013, the Partnership was party to a Customer Agreement with CGM (the “CGM Customer Agreement”). During the third quarter of 2013, the Partnership entered into a Customer Agreement with MS&Co. (the “MS&Co. Customer Agreement”) and, during the fourth quarter of 2013, a Selling Agent Agreement with Morgan Stanley Smith Barney LLC, doing business as Morgan Stanley Wealth Management (“Morgan Stanley Wealth Management”) (the “Selling Agreement”). The Partnership has terminated the CGM Customer Agreement.
	Under the CGM Customer Agreement, the Partnership paid CGM a monthly brokerage fee equal to 5/16 of 1.00% (3.75% per year) of month-end Net Assets, in lieu of brokerage fees on a per trade basis. Month-end Net Assets, for the purpose of calculating brokerage fees are Net Assets, as defined in the Limited Partnership Agreement, prior to the reduction of the current month’s brokerage fees, monthly management fee, incentive fee/profit share allocation accrual, the administrative fee and other expenses and any redemptions or distributions as of the end of such month. The Partnership paid for exchange, service, clearing, user, give-up, floor brokerage and National Futures Association (“NFA”) fees (collectively, the “CGM clearing fees”) through its investment in the Master. The CGM clearing fees were allocated to the Partnership based on its proportionate share of the Master. During the term of the CGM Customer Agreement, all of the Partnership’s assets that were not held in the Master’s accounts at CGM were deposited in the Partnership’s account at CGM. The Partnership’s cash was deposited by CGM in segregated bank accounts to the extent required by Commodity Futures Trading Commission regulations. CGM paid the Partnership interest on 80% of the average daily equity maintained in cash in the Partnership’s (or the Partnership’s allocable portion of the Master’s) brokerage account at a 30-day U.S. Treasury bill rate determined weekly by CGM based on the average non-competitive yield on 3-month U.S. Treasury bills maturing in 30 days from the date on which such weekly rate is determined.
	Under the MS&Co. Customer Agreement, the Partnership pays trading fees for the clearing and, where applicable, the execution of transactions, as well as exchange, clearing, user, give-up, floor brokerage and NFA fees (collectively, the “MS&Co. clearing fees,” and together with the CGM clearing fees, the “clearing fees”) through its investment in the Master. MS&Co. clearing fees are allocated to the Partnership based on its proportionate share of the Master. Clearing fees will be paid for the life of the Partnership, although the rate at which such fees are paid may be changed. All of the Partnership’s assets not held in the Master’s accounts at MS&Co. are deposited in the Partnership’s account at MS&Co. The Partnership’s cash is deposited by MS&Co. in segregated bank accounts to the extent required by Commodity Futures Trading Commission regulations. MS&Co. has agreed to pay the Partnership interest on 80% of the average daily equity maintained in cash in the Partnership’s (or the Partnership’s allocable portion of the Master’s) brokerage account at the rate equal to the monthly average of the 4-week U.S. Treasury bill discount rate. The MS&Co. Customer Agreement may generally be terminated upon notice by either party.
	Under the Selling Agreement with Morgan Stanley Wealth Management, the Partnership pays Morgan Stanley Wealth Management a monthly ongoing selling agent fee. Prior to April 1, 2014, the monthly ongoing selling agent fee was paid at a rate equal to 3.75% per year of month-end Net Assets. Effective April 1, 2014, the monthly ongoing selling agent fee was reduced to a rate equal to 2.50% per year of month-end Net Assets. Effective October 1, 2014, the monthly ongoing selling agent fee was reduced to a rate equal to 2.00% per year of month-end Net Assets. Morgan Stanley Wealth Management pays a portion of its ongoing selling agent fees to properly registered or exempted financial advisors who have sold Redeemable Units. Month-end Net Assets, for the purpose of calculating ongoing selling agent fees are Net Assets, as defined in the Limited Partnership Agreement, prior to the reduction of the current month’s ongoing selling agent fee, management fee, incentive fee accrued, the administrative fee and other expenses and redemptions or distributions as of the end of such month.

Trading_Activities

Trading Activities	12 Months Ended
	Dec. 31, 2014
Brokers and Dealers [Abstract]
Trading Activities	4	Trading Activities:
	The Partnership was formed for the purpose of trading contracts in a variety of commodity interests, including derivative financial instruments and derivative commodity interests. The Partnership invests substantially all of its assets through a “master-feeder” structure. The Partnership’s pro rata share of the results of the Master’s trading activities are shown in the Statements of Income and Expenses.
	During the third quarter of 2013, MB Master entered into a futures brokerage account agreement with MS&Co. MB Master commenced futures trading through an account at MS&Co. on or about August 19, 2013.
	The MS&Co. Customer Agreements with the Partnership and the Master gives, and the CGM Customer Agreement with the Partnership and the Master gave, the Partnership and the Master, respectively, the legal right to net unrealized gains and losses on open futures, option and forward contracts. The Master nets, for financial reporting purposes, the unrealized gains and losses on open futures, open option and open forward contracts on the Statements of Financial Condition as the criteria under Accounting Standards Codification 210-20, “Balance Sheet,” have been met.
	Brokerage fees previously paid to CGM were calculated as a percentage of the Partnership’s adjusted net asset value on the last day of each month and were affected by trading performance and redemptions. Trading and transaction fees are based on the number of trades executed by the Advisor for the Master and the Partnership’s percentage ownership of the Master. Professional fees and other expenses are borne by the Master and allocated to the Partnership, and also directly charged at the Partnership level. All other fees are charged at the Partnership level.
	For disclosures regarding the Master’s trading activities, see Note 4, “Trading Activities,” on the attached Master’s financial statements.

Subscriptions_Distributions_an

Subscriptions, Distributions and Redemptions	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Subscriptions, Distributions and Redemptions	5	Subscriptions, Distributions and Redemptions:
	Subscriptions are accepted monthly from investors that become limited partners on the first day of the month after their subscription is processed. Distributions of profits, if any, will be made at the sole discretion of the General Partner and at such times as the General Partner may decide. A limited partner may require the Partnership to redeem its Redeemable Units at their net asset value per Redeemable Unit as of the end of each month on three business days’ notice to the General Partner. There is no fee charged to limited partners in connection with redemptions.

Financial_Highlights

Financial Highlights	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Financial Highlights	6	Financial Highlights:
	Changes in the net asset value per unit for the years ended December 31, 2014, 2013 and 2012 were as follows:
			2014			2013			2012
	Net realized and unrealized gains (losses)1		$	(19.42	)	$	(12.87	)	$	139.64
	Interest income allocated from Master			0.21			0.45			0.74
	Expenses and incentive fees/allocation to Special Limited Partner2			(30.54	)		(30.76	)		(40.13	)
	Increase (decrease) for the year			(49.75	)		(43.18	)		100.25
	Net asset value per unit, beginning of year			1,448.01			1,491.19			1,390.94
	Net asset value per unit, end of year		$	1,398.26		$	1,448.01		$	1,491.19
	1	Includes ongoing selling agent fees and clearing fees allocated from Master. Net realized and unrealized gains (losses) excluding ongoing selling agent fees and clearing fees allocated from Master for the years ended December 31, 2014, 2013 and 2012 were $43.55, $64.55, and $200.36, respectively.
	2	Excludes ongoing selling agent fees and clearing fees allocated from Master and includes incentive fees/allocation to the Special Limited Partner, if any. Total expenses including ongoing selling agent fees and clearing fees allocated from Master for the years ended December 31, 2014, 2013 and 2012 were $(93.51), $(108.18), and $(100.85), respectively.
			2014			2013			2012
	Ratios to average net assets:
	Net investment income (loss)			(6.7	)%		(7.6	)%		(6.8	)%
	Incentive fees/allocation to Special Limited Partner			—	%		—	%		—	%
	Net investment income (loss) before incentive fees/allocation to Special Limited Partner3			(6.7	)%		(7.6	)%		(6.8	)%
	Operating expenses:			6.7	%		7.6	%		6.8	%
	Incentive fees/allocation to Special Limited Partner			—	%		—	%		—	%
	Total expenses and incentive fees/allocation to Special Limited Partner			6.7	%		7.6	%		6.8	%
	Total return:
	Total return before incentive fees/allocation to Special Limited Partner			(3.4	)%		(2.9	)%		7.2	%
	Incentive fees/allocation to Special Limited Partner			—	%		—	%		—	%
	Total return after incentive fees/allocation to Special Limited Partner			(3.4	)%		(2.9	)%		7.2	%
	3	Interest income allocated from Master less total expenses.
	The above ratios may vary for individual investors based on the timing of capital transactions during the year. Additionally, these ratios are calculated for the limited partner class using the limited partners’ share of income, expenses and average net assets.

Financial_Instrument_Risks

Financial Instrument Risks	12 Months Ended
	Dec. 31, 2014
Investments, All Other Investments [Abstract]
Financial Instrument Risks	7	Financial Instrument Risks:
	In the normal course of business, the Partnership, through its investment in the Master, is party to financial instruments with off-balance sheet risk, including derivative financial instruments and derivative commodity instruments. These financial instruments may include forwards, futures, options and swaps, whose values are based upon an underlying asset, index, or reference rate, and generally represent future commitments to exchange currencies or cash balances, to purchase or sell other financial instruments at specific terms at specified future dates, or, in the case of derivative commodity instruments, to have a reasonable possibility to be settled in cash, through physical delivery or with another financial instrument. These instruments may be traded on an exchange, a swap execution facility or over-the-counter (“OTC”). Exchange-traded instruments include futures and certain standardized forward, swap and option contracts. Certain swap contracts may also be traded on a swap execution facility or OTC. OTC contracts are negotiated between contracting parties and also include certain forwards and option contracts. Specific market movements of commodities or futures contracts underlying an option cannot accurately be predicted. The purchaser of an option may lose the entire premium paid for the option. The writer (or seller) of an option has unlimited risk. Each of these instruments is subject to various risks similar to those related to the underlying financial instruments including market and credit risk. In general, the risks associated with OTC contracts are greater than those associated with exchange-traded instruments because of the greater risk of default by the counterparty to an OTC contract. None of the Master’s current contracts are traded OTC, although contracts may be traded OTC in the future.
	The risk to the limited partners that have purchased Redeemable Units is limited to the amount of their share of the Partnership’s net assets and undistributed profits. The limited liability is a result of the organization of the Partnership as a limited partnership under New York law.
	Market risk is the potential for changes in the value of the financial instruments traded by the Partnership/Master due to market changes, including interest and foreign exchange rate movements and fluctuations in commodity or security prices. Market risk is directly impacted by the volatility and liquidity in the markets in which the related underlying assets are traded. The Partnership/Master is exposed to a market risk equal to the value of futures and forward contracts purchased and unlimited liability on such contracts sold short.
	Credit risk is the possibility that a loss may occur due to the failure of a counterparty to perform according to the terms of a contract. The Partnership’s/Master’s risk of loss in the event of a counterparty default is typically limited to the amounts recognized in the Statements of Financial Condition and is not represented by the contract or notional amounts of the instruments. The Partnership’s/Master’s risk of loss is reduced through the use of legally enforceable master netting agreements with counterparties that permit the Partnership/Master to offset unrealized gains and losses and other assets and liabilities with such counterparties upon the occurrence of certain events. The Partnership/Master had credit risk and concentration risk during the reporting period and prior periods, as MS&Co. and/or CGM or their affiliates were the sole counterparties or brokers with respect to the Partnership’s/Master’s assets. Credit risk with respect to exchange-traded instruments is reduced to the extent that, through MS&Co. and/or CGM, the Partnership’s/Master’s counterparty is an exchange or clearing organization. The Partnership/Master continue to be subject to such risks with respect to MS&Co.
	SandRidge concentrated the Partnership’s/Master’s trading in energy related markets. Concentration in a limited number of commodity interests may have subjected the Partnership’s/Master’s account to greater volatility than if a more diversified portfolio of contracts were traded on behalf of the Partnership/Master.
	As both a buyer and seller of options, the Partnership/Master pays or receives a premium at the outset and then bears the risk of unfavorable changes in the price of the contract underlying the option. Written options expose the Partnership/Master to potentially unlimited liability; for purchased options the risk of loss is limited to the premiums paid. Certain written put options permit cash settlement and do not require the option holder to own the reference asset. The Partnership/Master does not consider these contracts to be guarantees.
	The General Partner monitors and attempts to control the Partnership’s/Master’s risk exposure on a daily basis through financial, credit and risk management monitoring systems, and accordingly, believes that it has effective procedures for evaluating and limiting the credit and market risks to which the Partnership/Master may be subject. These monitoring systems generally allow the General Partner to statistically analyze actual trading results with risk-adjusted performance indicators and correlation statistics. In addition, online monitoring systems provide account analysis of futures, exchange cleared swap and option contracts by sector, margin requirements, gain and loss transactions and collateral positions.
	The majority of these instruments mature within one year of the inception date. However, due to the nature of the Partnership’s/Master’s business, these instruments may not be held to maturity.

Accounting_Policies_Policies

Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Use of Estimates	Use of Estimates.    The preparation of financial statements and accompanying notes in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires the General Partner to make estimates and assumptions that affect the reported amounts of assets and liabilities, income and expenses, and related disclosures of contingent assets and liabilities in the financial statements and accompanying notes. As a result, actual results could differ from these estimates.
Statement of Cash Flows	Statement of Cash Flows.    The Partnership is not required to provide a Statement of Cash Flows.
Investment Company Status	Investment Company Status.    Effective January 1, 2014, the Partnership adopted Accounting Standards Update (“ASU”) 2013-08, “Financial Services — Investment Companies (Topic 946): Amendments to the Scope, Measurement and Disclosure Requirements.” ASU 2013-08 changes the approach to the investment company assessment, requires non-controlling ownership interests in other investment companies to be measured at fair value, and requires additional disclosures about the investment company’s status as an investment company. ASU 2013-08 is effective for interim and annual reporting periods beginning after December 15, 2013. The adoption of this ASU did not have a material impact on the Partnership’s financial statements. Based on the General Partner’s assessment, the Partnership has been deemed to be an investment company since inception.
Partnership's Fair Value Measurements	Partnership’s Fair Value Measurements.    Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date under current market conditions. The fair value hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to fair values derived from unobservable inputs (Level 3). The level in the fair value hierarchy within which the fair value measurement in its entirety falls shall be determined based on the lowest level input that is significant to the fair value measurement in its entirety.
	GAAP also requires the use of judgment in determining if a formerly active market has become inactive and in determining fair values when the market has become inactive. The General Partner has concluded that based on available information in the marketplace, there has not been a significant decrease in the volume and level of activity in the Partnership’s Level 2 assets and liabilities.
	The Partnership will separately present purchases, sales, issuances, and settlements in its reconciliation of Level 3 fair value measurements (i.e., to present such items on a gross basis rather than on a net basis), and make disclosures regarding the level of disaggregation and the inputs and valuation techniques used to measure fair value for measurements that fall within either Level 2 or Level 3 of the fair value hierarchy as required under GAAP.
	The Partnership values its investment in the Master with no other rights or obligations inherent within the ownership interest held by the Partnership based on the end of the day net asset value of the Master (Level 2). The value of the Partnership’s investment in the Master reflects its proportional interest in the Master. As of and for the years ended December 31, 2014 and 2013, the Partnership did not hold any derivative instruments that were based on unadjusted quoted prices in active markets for identical assets and liabilities (Level 1) or priced at fair value using unobservable inputs through the application of the General Partner’s assumptions and internal valuation pricing models (Level 3). During the years ended December 31, 2014 and 2013, there were no transfers of assets or liabilities between Level 1 and Level 2.
			December 31,		Quoted Prices in		Significant Other		Significant
			2014		Active Markets for		Observable Inputs		Unobservable
					Identical Assets		(Level 2)		Inputs
					and Liabilities				(Level 3)
					(Level 1)
	Assets
	Investment in Master		$	209,288,768	$	—	$	209,288,768	$	—
	Net fair value		$	209,288,768	$	—	$	209,288,768	$	—
			December 31,		Quoted Prices in		Significant Other		Significant
			2013		Active Markets for		Observable Inputs		Unobservable
					Identical Assets		(Level 2)		Inputs
					and Liabilities				(Level 3)
					(Level 1)
	Assets
	Investment in Master		$	266,266,592	$	—	$	266,266,592	$	—
	Net fair value		$	266,266,592	$	—	$	266,266,592	$	—
	Master’s Investments and Fair Value Measurements.    For disclosures regarding the Master’s investments and fair value measurements, see Note 2, “Accounting Policies,” on the attached Master’s financial statements.
Income Taxes
			Income Taxes.    Income taxes have not been provided as each partner is individually liable for the taxes, if any, on its share of the Partnership’s income and expenses.
	GAAP provides guidance for how uncertain tax positions should be recognized, measured, presented and disclosed in the financial statements and requires the evaluation of tax positions taken or expected to be taken in the course of preparing the Partnership’s financial statements to determine whether the tax positions are “more-likely-than-not” to be sustained by the applicable tax authority. Tax positions with respect to tax at the Partnership level not deemed to meet the “more-likely-than-not” threshold would be recorded as a tax benefit or expense in the current year. The General Partner has concluded that no provision for income tax is required in the Partnership’s financial statements.
	The Partnership files U.S. federal and various state and local tax returns. No income tax returns are currently under examination. The 2011 through 2014 tax years remain subject to examination by U.S. federal and most state tax authorities. The General Partner does not believe that there are any uncertain tax positions that require recognition of a tax liability.
Net Income (Loss) per unit	Net Income (Loss) per unit.    Net income (loss) per unit is calculated in accordance with investment company guidance. See Note 6, “Financial Highlights.”
Subsequent Events	Subsequent Events.    The General Partner of the Partnership evaluates events that occur after the balance sheet date but before financial statements are issued. The General Partner has assessed the subsequent events through the date of issuance and determined that no events have occurred that require adjustments to or disclosure in the financial statements.
Partnership [Member]
Investment Company Status		Partnership’s Investments.    The Partnership’s investment in the Master is stated at fair value, which is based on (1) the Partnership’s net contribution to the Master and (2) its allocated share of the undistributed profits and losses, including realized gains/losses and the change in net unrealized gains/losses, of the Master. The Master values its investments as described in Note 2, “Accounting Policies,” on the attached Master’s financial statements.

Accounting_Policies_Tables

Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Value of Partnership's Investment in Master	During the years ended December 31, 2014 and 2013, there were no transfers of assets or liabilities between Level 1 and Level 2.
		December 31,		Quoted Prices in		Significant Other		Significant
		2014		Active Markets for		Observable Inputs		Unobservable
				Identical Assets		(Level 2)		Inputs
				and Liabilities				(Level 3)
				(Level 1)
	Assets
	Investment in Master	$	209,288,768	$	—	$	209,288,768	$	—
	Net fair value	$	209,288,768	$	—	$	209,288,768	$	—
		December 31,		Quoted Prices in		Significant Other		Significant
		2013		Active Markets for		Observable Inputs		Unobservable
				Identical Assets		(Level 2)		Inputs
				and Liabilities				(Level 3)
				(Level 1)
	Assets
	Investment in Master	$	266,266,592	$	—	$	266,266,592	$	—
	Net fair value	$	266,266,592	$	—	$	266,266,592	$	—

Financial_Highlights_Tables

Financial Highlights (Tables)	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Changes in Net Asset Value per Unit	Changes in the net asset value per unit for the years ended December 31, 2014, 2013 and 2012 were as follows:
			2014			2013			2012
	Net realized and unrealized gains (losses)1		$	(19.42	)	$	(12.87	)	$	139.64
	Interest income allocated from Master			0.21			0.45			0.74
	Expenses and incentive fees/allocation to Special Limited Partner2			(30.54	)		(30.76	)		(40.13	)
	Increase (decrease) for the year			(49.75	)		(43.18	)		100.25
	Net asset value per unit, beginning of year			1,448.01			1,491.19			1,390.94
	Net asset value per unit, end of year		$	1,398.26		$	1,448.01		$	1,491.19
	1	Includes ongoing selling agent fees and clearing fees allocated from Master. Net realized and unrealized gains (losses) excluding ongoing selling agent fees and clearing fees allocated from Master for the years ended December 31, 2014, 2013 and 2012 were $43.55, $64.55, and $200.36, respectively.
	2	Excludes ongoing selling agent fees and clearing fees allocated from Master and includes incentive fees/allocation to the Special Limited Partner, if any. Total expenses including ongoing selling agent fees and clearing fees allocated from Master for the years ended December 31, 2014, 2013 and 2012 were $(93.51), $(108.18), and $(100.85), respectively.
			2014			2013			2012
	Ratios to average net assets:
	Net investment income (loss)			(6.7	)%		(7.6	)%		(6.8	)%
	Incentive fees/allocation to Special Limited Partner			—	%		—	%		—	%
	Net investment income (loss) before incentive fees/allocation to Special Limited Partner3			(6.7	)%		(7.6	)%		(6.8	)%
	Operating expenses:			6.7	%		7.6	%		6.8	%
	Incentive fees/allocation to Special Limited Partner			—	%		—	%		—	%
	Total expenses and incentive fees/allocation to Special Limited Partner			6.7	%		7.6	%		6.8	%
	Total return:
	Total return before incentive fees/allocation to Special Limited Partner			(3.4	)%		(2.9	)%		7.2	%
	Incentive fees/allocation to Special Limited Partner			—	%		—	%		—	%
	Total return after incentive fees/allocation to Special Limited Partner			(3.4	)%		(2.9	)%		7.2	%
	3	Interest income allocated from Master less total expenses.

Partnership_Organization_Addit

Partnership Organization - Additional Information (Detail) (USD $)	0 Months Ended		12 Months Ended			0 Months Ended
	Dec. 31, 2014	Sep. 06, 2005	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 31, 2013	Feb. 01, 2013	Dec. 01, 2005
Related Party Transaction [Line Items]
Limited partnership organization formation date	20-Apr-05
Number of units sold during initial offering period		11,925
Redemption value			$62,896,985	$70,102,559	$49,658,008
Percentage of Partnership owned			91.70%	85.40%
Net asset value	209,461,299		209,461,299	266,296,505
Minimum [Member]
Related Party Transaction [Line Items]
Partnership liquidation date			31-Dec-55
Net assets value per unit liquidation circumstance	400		400
Net asset value	1,000,000		1,000,000
MB Master Fund L.P. [Member]
Related Party Transaction [Line Items]
Cash value, Partnership purchased							262,944,186
CMF SandRidge Master Fund L.P. [Member]
Related Party Transaction [Line Items]
Units of Partnership purchased								14,410.62
Cash value, Partnership purchased								14,477,858
Fair value, Partnership purchased								-16,018
Redemption value						$280,445,995

Accounting_Policies_Additional

Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Accounting Policies [Abstract]
Transfers of assets or liabilities between Level 1 and Level 2	$0	$0

Accounting_Policies_Value_of_P

Accounting Policies - Value of Partnership's Investment in Master (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in Master	$209,288,768	$266,266,592
Net fair value	209,288,768	266,266,592
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in Master	209,288,768	266,266,592
Net fair value	$209,288,768	$266,266,592

Agreements_Additional_Informat

Agreements - Additional Information (Detail)	3 Months Ended	9 Months Ended	12 Months Ended	3 Months Ended	6 Months Ended	2 Months Ended	10 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2014	Mar. 31, 2014	Sep. 30, 2014	Feb. 28, 2014	Dec. 31, 2014
Agreements [Line Items]
Administrative fee	1.00%	0.50%
Percentage of management fee paid to SandRidge			2.00%
Percentage of share of profit to special partner			20.00%
Citigroup Global Markets Inc [Member] | Customer Agreement [Member]
Agreements [Line Items]
Per year brokerage fee			3.75%
Monthly brokerage fee			0.31%
Percentage of Partnership interest on average daily equity maintained in cash for which interest is paid by CGM			80.00%
U.S. Treasury bills maturity period			30 days
Morgan Stanley [Member] | Customer Agreement [Member]
Agreements [Line Items]
Percentage of Partnership interest on average daily equity maintained in cash for which interest is paid by CGM			80.00%
Morgan Stanley Wealth Management [Member] | Selling Agreement [Member]
Agreements [Line Items]
Per year brokerage fee	2.00%			3.75%	2.50%
Managed Futures Premier Aventis II L.P. [Member]
Agreements [Line Items]
Percentage of management fee paid to SandRidge						1.50%	1.25%
Percentage of share of profit to special partner			20.00%

Subscriptions_Distributions_an1

Subscriptions, Distributions and Redemptions - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Period of notice to redeem limited Partnership	3 days
Redemptions fee charged to limited partners	$0

Financial_Highlights_Changes_i

Financial Highlights - Changes in Net Asset Value per Unit (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Partners' Capital [Abstract]
Net realized and unrealized gains (losses)	-19.42	-12.87	139.64
Interest income allocated from Master	0.21	0.45	0.74
Expenses and incentive fees/allocation to Special Limited Partner	-30.54	-30.76	-40.13
Increase (decrease) for the year	-49.75	-43.18	100.25
Net asset value per unit, beginning of year	1,448.01	1,491.19	1,390.94
Net asset value per unit, end of year	1,398.26	1,448.01	1,491.19
Ratios to average net assets:
Net investment income (loss)	-6.70%	-7.60%	-6.80%
Incentive fees/allocation to Special Limited Partner	0.00%	0.00%	0.00%
Net investment income (loss) before incentive fees/allocation to Special Limited Partner	-6.70%	-7.60%	-6.80%
Operating expenses	6.70%	7.60%	6.80%
Incentive fees/allocation to Special Limited Partner	0.00%	0.00%	0.00%
Total expenses and incentive fees/allocation to Special Limited Partner	6.70%	7.60%	6.80%
Total return:
Total return before incentive fees/allocation to Special Limited Partner	-3.40%	-2.90%	7.20%
Incentive fees/allocation to Special Limited Partner	0.00%	0.00%	0.00%
Total return after incentive fees/allocation to Special Limited Partner	-3.40%	-2.90%	7.20%

Financial_Highlights_Changes_i1

Financial Highlights - Changes in Net Asset Value per Unit (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Partners' Capital [Abstract]
Net realized and unrealized gains (losses) excluding ongoing selling agent fees and clearing fees	43.55	64.55	200.36
Total expenses including ongoing selling agent fees and clearing fees	-93.51	-108.18	-100.85

Financial_Instrument_Risks_Add

Financial Instrument Risks - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Financial instruments maturity period	1 year