Managed Futures Premier Warrington 10-K 27 Mar 18 2017 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2017	Feb. 28, 2018	Jun. 30, 2017
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Trading Symbol	ck0001353282
Entity Registrant Name	MANAGED FUTURES PREMIER WARRINGTON L.P.
Entity Central Index Key	1,353,282
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Class A [Member]
Document Information [Line Items]
Entity Limited Partnership Redeemable Units Outstanding		44,525.25
Entity Public Float			$ 63,554,925
Class D [Member]
Document Information [Line Items]
Entity Limited Partnership Redeemable Units Outstanding		409.53
Entity Public Float			$ 558,316

Statements of Financial Conditi

Statements of Financial Condition - USD ($)		Dec. 31, 2017	Dec. 31, 2016
Equity in trading account:
Cash (Note 3c)		$ 25,880,554	$ 26,494,170
Cash margin (Note 3c)		9,145,348	11,471,701
Options purchased, at fair value (cost $147,400 and $577,300 at December 31, 2017 and 2016, respectively)		211,200	621,000
Total trading equity		35,237,102	38,586,871
Total assets		60,344,765	73,580,357
Liabilities:
Written options, at fair value (premium received $157,300 and $635,950 at December 31, 2017 and 2016, respectively)		209,000	699,200
Accrued expenses:
Ongoing selling agent fees (Note 3c)		99,043	119,813
Advisory fees (Note 3b)		99,229	120,573
Administrative fees (Note 3a)		49,614	60,287
Professional fees		135,185	44,128
Other		7,948	3,096
Redemptions payable (Note 5)		699,530	732,695
Total liabilities		1,299,549	1,779,792
Partners’ Capital: (Notes 1 and 5)
Total partners’ capital		59,045,216	71,800,565
Total liabilities and partners’ capital		60,344,765	73,580,357
U.S. Government Securities [Member]
Equity in trading account:
Investments in U.S. government securities, at fair value (cost $25,039,569 and $34,975,633 at December 31, 2017 and 2016, respectively)		25,107,663	34,993,486
Class GP [Member]
Partners’ Capital: (Notes 1 and 5)
General Partner, Class GP, (293.0594 and 327.3092 unit equivalents outstanding at December 31, 2017 and 2016, respectively)		356,295	370,552
Total partners’ capital	[1]	$ 356,295	$ 370,552
Net asset value per unit:
Net asset value per unit		$ 1,215.79	$ 1,132.11
Class A [Member]
Partners’ Capital: (Notes 1 and 5)
Limited Partners		$ 58,139,561	$ 70,225,435
Total partners’ capital		$ 58,139,561	$ 70,225,435
Net asset value per unit:
Net asset value per unit		$ 1,253.14	$ 1,234.93
Class D [Member]
Partners’ Capital: (Notes 1 and 5)
Limited Partners		$ 549,360	$ 1,204,578
Total partners’ capital		$ 549,360	$ 1,204,578
Net asset value per unit:
Net asset value per unit		$ 1,341.44	$ 1,309.33
[1]	Class GP commenced on May 1, 2015.

Statements of Financial Condit3

Statements of Financial Condition (Parenthetical) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Cost of options purchased	$ 147,400	$ 577,300
Cost of investments in securities	25,039,569	34,975,633
Premium received	$ 157,300	$ 635,950
Class GP [Member]
General Partner unit equivalents outstanding	293.0594	327.3092
Class A [Member]
Limited Partners Redeemable units outstanding	46,395.0467	56,865.8745
Class D [Member]
Limited Partners Redeemable units outstanding	409.5317	919.9988

Condensed Schedule of Investmen

Condensed Schedule of Investments	Dec. 31, 2017USD ($)Contract	Dec. 31, 2016USD ($)Contract
Schedule of Investments [Line Items]
% of Partners’ Capital	0.00%	(0.11%)
Fair Value	$ 211,200	$ 621,000
Fair Value	(209,000)	(699,200)
Net fair value	$ 2,200	$ (78,200)
Call or Put Options Purchased [Member]
Schedule of Investments [Line Items]
% of Partners’ Capital	0.36%	0.86%
Fair Value	$ 211,200	$ 621,000
Call or Put Written Options [Member]
Schedule of Investments [Line Items]
% of Partners’ Capital	(0.36%)	(0.97%)
Fair Value	$ (209,000)	$ (699,200)
United States Government Treasury Bills [Member]
Schedule of Investments [Line Items]
Fair Value	$ 25,107,663	$ 34,993,486
% of Partners’ Capital	42.52%	48.73%
United States Government Treasury Bills [Member] | Treasury Bill 0% due March 8, 2018 [Member]
Schedule of Investments [Line Items]
Face Value	$ 4,049,500
Fair Value	$ 4,040,183
% of Partners’ Capital	6.84%
United States Government Treasury Bills [Member] | Treasury Bill 0% due February 22, 2018 [Member]
Schedule of Investments [Line Items]
Face Value	$ 8,037,200
Fair Value	$ 8,024,662
% of Partners’ Capital	13.59%
United States Government Treasury Bills [Member] | Treasury Bill 0% due February 1, 2018 [Member]
Schedule of Investments [Line Items]
Face Value	$ 6,024,500
Fair Value	$ 6,019,001
% of Partners’ Capital	10.19%
United States Government Treasury Bills [Member] | Treasury Bill 0% due January 4, 2018 [Member]
Schedule of Investments [Line Items]
Face Value	$ 7,024,400
Fair Value	$ 7,023,817
% of Partners’ Capital	11.90%
United States Government Treasury Bills [Member] | Treasury Bill 0% due May 4, 2017 [Member]
Schedule of Investments [Line Items]
Face Value		$ 8,016,200
Fair Value		$ 8,000,314
% of Partners’ Capital		11.14%
United States Government Treasury Bills [Member] | Treasury Bill 0% due April 6, 2017 [Member]
Schedule of Investments [Line Items]
Face Value		$ 9,000,000
Fair Value		$ 8,990,343
% of Partners’ Capital		12.52%
United States Government Treasury Bills [Member] | Treasury Bill 0% due March 2, 2017 [Member]
Schedule of Investments [Line Items]
Face Value		$ 9,010,000
Fair Value		$ 9,004,809
% of Partners’ Capital		12.54%
United States Government Treasury Bills [Member] | Treasury Bill 0% due February 2, 2017 [Member]
Schedule of Investments [Line Items]
Face Value		$ 9,000,000
Fair Value		$ 8,998,020
% of Partners’ Capital		12.53%
Put Option [Member] | Call or Put Options Purchased [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	264	184
% of Partners’ Capital	0.36%	0.86%
Fair Value	$ 211,200	$ 621,000
Put Option [Member] | Call or Put Written Options [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	1,056	920
% of Partners’ Capital	(0.34%)	(0.88%)
Fair Value	$ (198,000)	$ (630,200)
Call Option [Member] | Call or Put Written Options [Member]
Schedule of Investments [Line Items]
Number of Contracts | Contract	440	920
% of Partners’ Capital	(0.02%)	(0.10%)
Fair Value	$ (11,000)	$ (69,000)

Condensed Schedule of Investme5

Condensed Schedule of Investments (Parenthetical) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Schedule of Investments [Line Items]
Cost of investments in U.S. government securities	$ 25,039,569	$ 34,975,633
Options purchased at cost	147,400	577,300
Premium received	157,300	635,950
United States Government Treasury Bills [Member]
Schedule of Investments [Line Items]
Cost of investments in U.S. government securities	$ 25,039,569	$ 34,975,633
United States Government Treasury Bills [Member] | Treasury Bill 0% due March 8, 2018 [Member]
Schedule of Investments [Line Items]
Investment, Maturity date	Mar. 8, 2018
Investment, Interest rate	0.00%
United States Government Treasury Bills [Member] | Treasury Bill 0% due February 22, 2018 [Member]
Schedule of Investments [Line Items]
Investment, Maturity date	Feb. 22, 2018
Investment, Interest rate	0.00%
United States Government Treasury Bills [Member] | Treasury Bill 0% due February 1, 2018 [Member]
Schedule of Investments [Line Items]
Investment, Maturity date	Feb. 1, 2018
Investment, Interest rate	0.00%
United States Government Treasury Bills [Member] | Treasury Bill 0% due January 4, 2018 [Member]
Schedule of Investments [Line Items]
Investment, Maturity date	Jan. 4, 2018
Investment, Interest rate	0.00%
United States Government Treasury Bills [Member] | Treasury Bill 0% due May 4, 2017 [Member]
Schedule of Investments [Line Items]
Investment, Maturity date		May 4, 2017
Investment, Interest rate		0.00%
United States Government Treasury Bills [Member] | Treasury Bill 0% due April 6, 2017 [Member]
Schedule of Investments [Line Items]
Investment, Maturity date		Apr. 6, 2017
Investment, Interest rate		0.00%
United States Government Treasury Bills [Member] | Treasury Bill 0% due March 2, 2017 [Member]
Schedule of Investments [Line Items]
Investment, Maturity date		Mar. 2, 2017
Investment, Interest rate		0.00%
United States Government Treasury Bills [Member] | Treasury Bill 0% due February 2, 2017 [Member]
Schedule of Investments [Line Items]
Investment, Maturity date		Feb. 2, 2017
Investment, Interest rate		0.00%

Statements of Income and Expens

Statements of Income and Expenses - USD ($)		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Investment Income:
Interest income (Note 3c)		$ 295,297	$ 166,743	$ 28,030
Expenses:
Ongoing selling agent fees (Note 3c)		1,306,265	1,582,889	2,053,315
Clearing fees		796,605	562,239	648,977
Advisory fees (Note 3b)		1,310,989	1,589,074	2,079,389
Administrative fees (Note 3a)		655,495	794,540	1,039,694
Professional fees		200,106	272,636	309,868
Other		149,895	114,191	83,139
Total expenses		4,419,355	4,915,569	6,214,382
Net investment income (loss)		(4,124,058)	(4,748,826)	(6,186,352)
Net gains (losses) on trading of commodity interests:
Net realized gains (losses) on closed contracts		5,742,840	8,064,452	8,821,652
Change in net unrealized gains (losses) on open contracts		31,648	(30,088)	337,103
Total trading results		5,774,488	8,034,364	9,158,755
Net income (loss) before allocation to Special Limited Partner		1,650,430	3,285,538	2,972,403
Allocation to Special Limited Partner (Note 3b)		(453,819)	(2,588)
Net income (loss):
Net income (loss)		1,196,611	3,282,950	2,972,403
Class A [Member]
Net income (loss):
Net income (loss)		$ 1,136,990	$ 3,199,587	$ 2,738,420
Net income (loss) per unit (Note 6):*
Net income (loss) per unit	[1]	$ 18.21	$ 51.70	$ 24.82
Weighted average units outstanding:
Weighted average units outstanding		50,815.33	64,617.45	85,246.71
Class D [Member]
Net income (loss):
Net income (loss)		$ 27,695	$ 50,707	$ 223,675
Net income (loss) per unit (Note 6):*
Net income (loss) per unit	[1]	$ 32.11	$ 67.19	$ 41.13
Weighted average units outstanding:
Weighted average units outstanding		527.33	767.41	2,132
Class GP [Member]
Net income (loss):
Net income (loss)	[2],[3]	$ 31,926	$ 32,656	$ 10,308
Net income (loss) per unit (Note 6):*
Net income (loss) per unit	[1],[2]	$ 83.68	$ 100.39	$ 31.72
Weighted average units outstanding:
Weighted average units outstanding	[2]	402.17	325.64	325
[1]	Based on change in net asset value per unit.
[2]	Class GP commenced on May 1, 2015 (325.0000 units)
[3]	Class GP commenced on May 1, 2015.

Statements of Income and Expen7

Statements of Income and Expenses (Parenthetical) - shares	May 01, 2015	Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Class GP [Member]
Weighted average units outstanding	325	402.17	[1]	325.64	[1]	325	[1]
[1]	Class GP commenced on May 1, 2015 (325.0000 units)

Statements of Changes in Partne

Statements of Changes in Partners' Capital - USD ($)	Total	Limited Partners [Member]	Special Limited Partner [Member]	General Partner [Member]	Class A [Member]	Class A [Member]Limited Partners [Member]	Class D [Member]	Class D [Member]Limited Partners [Member]	Class D [Member]General Partner [Member]	Class GP [Member]	[2]	Class GP [Member]Limited Partners [Member]	[2]	Class GP [Member]Special Limited Partner [Member]	[2]	Class GP [Member]General Partner [Member]	[2]
Net Asset Value Per Unit					$ 1,158.41		$ 1,201.01
Partners' capital, Amount, beginning balance at Dec. 31, 2014	$ 133,297,371				$ 125,736,962		$ 7,560,409
Partners' capital, Units, beginning balance at Dec. 31, 2014	114,837.79				108,542.74		6,295.05
Net Income (loss) available for pro rata distribution	$ 2,972,403				$ 2,738,420		$ 223,675			$ 10,308	[1]
Redemptions, Amount		$ (46,739,090)		$ (1,525,629)		$ (41,418,066)		$ (5,321,024)	$ (1,525,629)
Redemptions, Units		(39,271.60)		(1,235.75)		(34,966.99)		(4,304.61)	(1,235.75)
Subscriptions, Amount				$ 325,000												$ 325,000
Subscriptions, Units				325												325
Partners' capital, Amount, ending balance at Dec. 31, 2015	$ 88,330,055				$ 87,057,316		$ 937,431			$ 335,308
Partners' capital, Units, ending balance at Dec. 31, 2015	74,655.44				73,575.75		754.69			325
Net Asset Value Per Unit					$ 1,183.23		$ 1,242.14			$ 1,031.72
Net Income (loss) available for pro rata distribution	$ 3,282,950				$ 3,199,587		$ 50,707			$ 32,656	[1]
Redemptions, Amount		$ (20,031,468)				$ (20,031,468)
Redemptions, Units		(16,709.88)				(16,709.88)
Allocation of Redeemable Units to the Special Limited Partner, Amount			$ 2,588											$ 2,588
Allocation of Redeemable Units to the Special Limited Partner, Units			2.31											2.31
Subscriptions, Amount		$ 216,440						$ 216,440
Subscriptions, Units		165.31						165.31
Partners' capital, Amount, ending balance at Dec. 31, 2016	$ 71,800,565				$ 70,225,435		$ 1,204,578			$ 370,552
Partners' capital, Units, ending balance at Dec. 31, 2016	58,113.18				56,865.87		920			327.31
Net Asset Value Per Unit					$ 1,234.93		$ 1,309.33			$ 1,132.11
Net Income (loss) available for pro rata distribution	$ 1,196,611				$ 1,136,990		$ 27,695			$ 31,926	[1]
Redemptions, Amount		$ (14,512,539)				$ (13,222,864)		$ (789,673)				$ (500,000)
Redemptions, Units		(11,475.15)				(10,470.83)		(590.27)				(414.05)
Allocation of Redeemable Units to the Special Limited Partner, Amount			$ 453,819											$ 453,817
Allocation of Redeemable Units to the Special Limited Partner, Units			379.80											379.80
Subscriptions, Amount		$ 106,760						$ 106,760
Subscriptions, Units		79.80						79.80
Partners' capital, Amount, ending balance at Dec. 31, 2017	$ 59,045,216				$ 58,139,561		$ 549,360			$ 356,295
Partners' capital, Units, ending balance at Dec. 31, 2017	47,097.63				46,395.04		409.53			293.06
Net Asset Value Per Unit					$ 1,253.14		$ 1,341.44			$ 1,215.79
[1]	Class GP commenced on May 1, 2015 (325.0000 units)
[2]	Class GP commenced on May 1, 2015.

Partnership Organization

Partnership Organization	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Partnership Organization	1. Partnership Organization: Managed Futures Premier Warrington L.P. (formerly known as Warrington Fund L.P.) (the “Partnership”) is a limited partnership organized on November 28, 2005, under the partnership laws of the State of New York to engage in the speculative trading of commodity interests including futures and option contracts. The Partnership does not currently intend to, but may in the future, engage in transactions in spot and forward markets. The Partnership primarily trades futures and options in the stock indices sector. The Partnership may also hold U.S. Treasury bills. The Partnership commenced trading on February 21, 2006. The commodity interests that are traded by the Partnership are volatile and involve a high degree of market risk. The Partnership privately and continuously offers redeemable units of limited partnership interest (“Redeemable Units”) in the Partnership to qualified investors. There is no maximum number of Redeemable Units that may be sold by the Partnership. Effective as of the close of business on March 31, 2015, Warrington GP, 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 beneficially owned by Scott C. Kimple. From inception to the close of business on March 31, 2015, Ceres Managed Futures LLC, a Delaware limited liability company, acted as the general partner (“CMF GP”) and commodity pool operator of the Partnership. On January 9, 2015, Scott C. Kimple proposed in a Proxy Statement, which was filed with the Securities and Exchange Commission (the “SEC”) and distributed to Limited Partners (defined below), that Warrington GP, LLC become the new general partner of the Partnership. The requisite number of each class of limited partnership interests approved the proposals described in the Proxy Statement, and, as a result, Warrington GP, LLC became the new general partner of the Partnership effective as of the close of business on March 31, 2015. CMF GP withdrew as the general partner of the Partnership immediately following Warrington GP, LLC becoming the Partnership’s new general partner. References to the “General Partner” herein refer to Warrington GP, LLC and/or CMF GP, as the context requires. Effective as of the close of business on March 31, 2015, Warrington SLP, LP, a Delaware limited liability company and an affiliate of the General Partner, became a special limited partner of the Partnership (the “Special Limited Partner”) and receives a quarterly profit share allocation equal to 20% of new trading profits from the Partnership in the form of Redeemable Units, subject to a high water mark. All of the trading decisions for the Partnership are made by Warrington Asset Management LLC (the “Advisor”), an affiliate of the General Partner, using the Strategic Trading Program (formerly, the “Core Trading Program”), a proprietary trading program. The General Partner is not aware of any material changes to the trading program discussed above during the fiscal year ended December 31, 2017. On June 15, 2011, the Partnership began offering “Class A” Redeemable Units and “Class D” Redeemable Units pursuant to the offering memorandum. All outstanding Redeemable Units on June 15, 2011 were designated Class A Redeemable Units. The rights, powers, duties and obligations associated with the investment in Class A Redeemable Units were not changed. On October 1, 2011, the first Class D Redeemable Units were issued to limited partners of the Partnership (each a “Limited Partner”). Class A Redeemable Units and Class D Redeemable Units will each be referred to as a “Class” and collectively referred to as the “Classes.” The Class of Redeemable Units that a Limited Partner receives will generally depend upon the amount invested in the Partnership, although the General Partner may determine to offer Class A Redeemable Units or Class D Redeemable Units to investors in its sole discretion. On May 1, 2015, a new share class of units of general partner interest “Class GP” was initiated to accept an investment from the General Partner. During the twelve months ended December 31, 2017, the Partnership’s commodity brokers were Wells Fargo Securities, LLC (“Wells Fargo”), Wedbush Securities, Inc. (“Wedbush”) and ADM Investor Services, Inc. (“ADM”), all of which are registered futures commission merchants. Effective April 1, 2015, the Partnership entered into a futures and cleared swaps agreement with Wells Fargo (the “Wells Fargo Customer Agreement”). Under the Wells Fargo Customer Agreement, during the reporting period and prior periods included in this report, the Partnership paid Wells Fargo trading fees for the clearing and, if applicable, execution of transactions. In addition, with respect to excess cash, Wells Fargo paid the Partnership interest on excess cash held in the Partnership’s account at rates customarily paid by Wells Fargo and as advised to the Partnership from time to time. Effective April 21, 2017, the Partnership entered into a commodity futures customer agreement with Wedbush (the “Wedbush Customer Agreement”); however, the Partnership did not engage in any trading activity through Wedbush until June 26, 2017. The Partnership pays Wedbush trading fees for the clearing and, if applicable, execution of transactions. In addition, with respect to excess cash, Wedbush does not pay interest on excess cash held in the Partnership’s account. The excess cash balances will be monitored and are expected to have an immaterial impact on the interest earned. Effective March 13, 2017, the Partnership entered into a commodity futures customer agreement with ADM (the “ADM Customer Agreement”); however, the Partnership did not engage in any trading activity through ADM until April 6, 2017. The Partnership pays ADM trading fees for the clearing and, if applicable, execution of transactions. In addition, with respect to excess cash, ADM does not pay interest on excess cash held in the Partnership’s account. The excess cash balances will be monitored and are expected to have an immaterial impact on the interest earned. During prior periods included in this report, Morgan Stanley & Co. LLC (“MS&Co.”), a registered futures commission merchant also served as a commodity broker. 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 shall be 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’s trading of futures and option contracts, if applicable, on commodities is done primarily on U.S. commodity exchanges. During the twelve months ended December 31, 2017, the Partnership engaged in such trading through commodity brokerage accounts maintained with Wells Fargo. During the first quarter of 2015 and prior periods included in this report, the Partnership engaged in such trading through commodity brokerage accounts maintained with MS&Co. The Partnership will be liquidated upon the first to occur of the following: December 31, 2025; when the net asset value per Redeemable Unit of any Class decreases to less than $400 as of the close of trading on any business day; or under certain other circumstances as defined in the limited partnership agreement of the Partnership, as amended or restated from time to time (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, 2017
Accounting Policies [Abstract]
Accounting Policies	2. Accounting Policies: a. Use of Estimates. b. Partnership’s Investments. c. Partnership’s Fair Value Measurements. 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 considers prices for exchange-traded commodity futures and option contracts to be based on unadjusted quoted prices in active markets for identical assets and liabilities (Level 1). The values of futures and certain option contracts for which market quotations are not readily available are priced by broker-dealers that derive fair values for those assets and liabilities from observable inputs (Level 2). As of and for the years ended December 31, 2017 and 2016, the Partnership did not hold any derivative instruments for which market quotations were not readily available and which were priced by broker-dealers that derive fair values for those assets from observable inputs (Level 2) or that were priced at fair value using unobservable inputs through the application of the General Partner’s assumptions and internal valuation pricing models (Level 3). As such a rollforward of Level 3 derivative instruments was not presented, nor was a table presenting unobservable inputs used by management in the fair value measurement process. During the years ended December 31, 2017 and 2016, there were no transfers of assets or liabilities between Level 1 and Level 2. December 31, 2017 Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Investments in U.S. government securities, at fair value $ 25,107,663 $ — $ 25,107,663 $ — Options purchased 211,200 211,200 — — Total assets 25,318,863 211,200 25,107,663 — Liabilities Written options $ 209,000 $ 209,000 $ — $ — Total liabilities 209,000 209,000 — — Net fair value $ 25,109,863 $ 2,200 $ 25,107,663 $ — December 31, 2016 Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Investments in U.S. government securities, at fair value $ 34,993,486 $ — $ 34,993,486 $ — Options purchased 621,000 621,000 — — Total assets 35,614,486 621,000 34,993,486 — Liabilities Written options $ 699,200 $ 699,200 $ — $ — Total liabilities 699,200 699,200 — — Net fair value $ 34,915,286 $ (78,200 ) $ 34,993,486 $ — d. Futures Contracts ® e. Options f. Income Taxes 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 2013 through 2017 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. g. United States Treasury Bills h. Investment Company Status Financial Services — Investment Companies (“Topic 946”): Amendments to the Scope, Measurement and Disclosure Requirements

Agreements

Agreements	12 Months Ended
	Dec. 31, 2017
Commitments And Contingencies Disclosure [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. The Partnership pays the General Partner a monthly administrative fee in return for its services to the Partnership equal to 1/12 of 1% (1% per year) of month-end Net Assets per Class, for each outstanding Class, of the Partnership. Prior to October 1, 2014, the Partnership paid the General Partner a monthly administrative fee equal to 1/12 of 0.5% (0.5% per year) of month-end Net Assets per Class, for each outstanding Class, of the Partnership. Month-end Net Assets per Class, for the purpose of calculating administrative fees are Net Assets per Class, as defined in the Limited Partnership Agreement, prior to the reduction of the current month’s advisory 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 Advisor or one of its affiliates, all of which are controlled by Scott C. Kimple, has served as the Partnership’s commodity trading advisor since inception. The General Partner and the Partnership have entered into a management agreement (the “Management Agreement”) with the Advisor. As compensation for services, the Partnership pays the Advisor a monthly advisory fee equal to 1/12 of 2% (2% per year) of month-end Net Assets per Class, for each outstanding Class, managed by the Advisor. Month-end Net Assets per Class, for each outstanding Class, for the purpose of calculating advisory fees are Net Assets per Class, for each outstanding Class, as defined in the Limited Partnership Agreement, prior to the reduction of the current month’s advisory fee, profit share allocation accrual, the administrative fee and any redemptions or distributions as of the end of such month. The Management Agreement may be terminated upon notice by any party thereunder. In addition, the Special Limited Partner receives 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 shall be equal to 20% of new trading profits, as defined in the Limited Partnership Agreement, earned for each outstanding Class by the Advisor on behalf of the Partnership during each calendar quarter and are issued as Special Limited Partner unit equivalents. The Special Limited Partner will not receive a profit share allocation until the Advisor recovers the net loss incurred and earns additional new trading profits for the Partnership. In allocating substantially all of the assets of the Partnership to the Advisor, the General Partner considers the Advisor’s past performance, trading style, volatility of the markets traded and fee requirements. The General Partner may modify or terminate the allocation of assets to the Advisor at any time. c. Customer Agreement/Selling Agent 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, the Partnership entered into a Selling Agent Agreement with Morgan Stanley Wealth Management (the “Selling Agreement”). Effective April 1, 2015, the Partnership entered into the Wells Fargo Customer Agreement, continuing services agreements with each of Morgan Stanley Wealth Management and Credit Suisse Securities (USA) LLC and a selling agreement with Robert W. Baird & Co. Incorporated (“Baird”). The MS&Co. Customer Agreement and the Wells Fargo Customer Agreement have been terminated. Under the MS&Co. Customer Agreement, the Partnership paid trading fees for the clearing and, where applicable, execution of transactions, as well as exchange, clearing, user, give-up, floor brokerage and NFA fees (collectively, the “MS&Co. clearing fees”) directly. During the term of the MS&Co. Customer Agreement, all of the Partnership’s assets were deposited in the Partnership’s account at MS&Co. The Partnership’s cash was deposited by MS&Co. in segregated bank accounts to the extent required by CFTC regulations. MS&Co. paid the Partnership interest on 80% of the average daily equity maintained in cash in the Partnership’s brokerage account at the rate equal to the monthly average of the 4-week U.S. Treasury bill discount rate. Under the Wells Customer Agreement, Partnership fees the clearing applicable, execution transactions, well exchange, give-up, (collectively, the clearing directly. term Agreement, Partnership’s deposited account portion segregated accounts extent regulations. December margin requirements Wells Fargo respectively. Wells agreed Partnership the daily maintained Partnership’s segregated account rate average rate. The balances will monitored expected immaterial impact interest Under the Wedbush and ADM Customer Agreements, Partnership fees the clearing applicable, execution transactions, well exchange, give-up, (collectively, the Wedbush, clearing together clearing “clearing directly. Clearing paid the although at changed. portion segregated accounts extent regulations. December margin requirements respectively. interest accounts. The balances will monitored expected immaterial impact interest Under the Selling Agreement with Morgan Stanley Wealth Management, the Partnership paid Morgan Stanley Wealth Management a monthly ongoing selling agent fee equal to (i) 1/6 of 1% (2% per year) of month-end Net Assets for Class A Redeemable Units and (ii) 1/12 of 0.75% (0.75% per year) of month-end Net Assets for Class D Redeemable Units. For the period from April 1, 2014 to September 30, 2014, the Partnership paid Morgan Stanley Wealth Management a monthly ongoing selling agent fee equal to (i) 5/24 of 1% (2.5% per year) of month-end Net Assets for Class A Redeemable Units and (ii) 1/12 of 1.25% (1.25% per year) of month-end Net Assets for Class D Redeemable Units. Prior to April 1, 2014, the Partnership paid Morgan Stanley Wealth Management a monthly ongoing selling agent fee equal to (i) 5/16 of 1% (3.75% per year) of month-end Net Assets for Class A Redeemable Units and (ii) 1/12 of 1.50% (1.50% per year) of month-end Net Assets for Class D Redeemable Units. The selling agent fee received by Morgan Stanley Wealth Management was shared with the properly registered/licensed financial advisors of Morgan Stanley Wealth Management who sold Redeemable Units. Month-end Net Assets, for the purpose of calculating ongoing selling agent fees were Net Assets, as defined in the Limited Partnership Agreement, prior to the reduction of the current month’s ongoing selling agent fee, Advisory fee, profit share allocation accrual, the administrative fee and other expenses and any redemptions or distributions as of the end of such month. Under the continuing services agreement with Morgan Stanley Wealth Management, the Partnership pays Morgan Stanley Wealth Management a monthly fee in respect of certain partnership interests which have been sold to certain individuals and entities with an ongoing relationship with Morgan Stanley Wealth Management (the “MS Interests”) equal to (i) 1/12 of 2.00% (2.00% per year) of month-end Net Assets for Class A Redeemable Units and (ii) 1/12 of 0.75% (0.75% per year) of month-end Net Assets for Class D Redeemable Units. The fees paid to Morgan Stanley Wealth Management shall continue only for as long as the MS Interests remain outstanding. Under the continuing services agreement with Credit Suisse Securities (USA) LLC, the Partnership pays Credit Suisse Securities (USA) LLC a monthly fee in respect of certain partnership interests which have been sold to certain individuals and entities with an ongoing relationship with Credit Suisse Securities (USA) LLC (the “CS Interests”) equal to (i) 1/12 of 2.00% (2.00% per year) of month-end Net Assets for Class A Redeemable Units and (ii) 1/12 of 0.75% (0.75% per year) of month-end Net Assets for Class D Redeemable Units. The fees paid to Credit Suisse Securities (USA) LLC shall continue only for as long as the CS Interests remain outstanding. Under the selling agreement with Baird, the Partnership pays Baird a monthly ongoing selling agent fee equal to (i) 1/12 of 2.00% (2.00% per year) of month-end Net Assets for Class A Redeemable Units and (ii) 1/12 of 0.75% (0.75% per year) of month-end Net Assets for Class D Redeemable Units. With respect to current Limited Partners that are customers of Baird, the Partnership shall pay Baird a monthly ongoing maintenance fee equal to (i) 1/12 of 2.00% (2.00% per year) of month-end Net Assets for Class A Redeemable Units and (ii) 1/12 of 0.75% (0.75% per year) of month-end Net Assets for Class D Redeemable Units for services provided to such current Limited Partners.

Trading Activities

Trading Activities	12 Months Ended
	Dec. 31, 2017
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 instruments. The results of the Partnership’s trading activities are shown in the Statements of Income and Expenses. The Wedbush Customer Agreement and the ADM Customer Agreement give, and the Wells Fargo Customer Agreement and the customer agreement between the Partnership and Morgan Stanley & Co. LLC (“MS&Co”) gave the Partnership the legal right to net unrealized gains and losses on open futures and option contracts. The Partnership netted as applicable, for financial reporting purposes, the unrealized gains and losses on open futures and option contracts on the Statements of Financial Condition as the criteria under Accounting Standards Codification 210-20, “Balance Sheet,” Ongoing selling agent fees paid to Baird, Morgan Stanley Wealth Management and Credit Suisse Securities (USA) LLC 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, subscriptions and redemptions. Trading and transaction fees are based on the number of trades executed by the Advisor for the Partnership. All clearing fees paid to Wells Fargo, Wedbush, ADM and executing brokers, as applicable, are, and all clearing fees paid to MS&Co. were, borne by the Partnership. All of the commodity interests owned by the Partnership are held for trading purposes. The monthly average number of option contracts held during the years ended December 31, 2017 and 2016 were 3,506 and 2,357, respectively. The following tables summarize the valuation of the Partnership’s investments as of December 31, 2017 and 2016: Gross Amounts not Offset in the Statements of Financial Condition December 31, 2017 Gross Amounts Recognized Gross Amounts Offset in the Statements of Financial condition Amounts Presented in the Statements of Financial condition Financial Instruments Cash Collateral Net Amount Assets Options purchased $ 211,200 $ — $ 211,200 $ (209,000 ) $ — $ 2,200 Total assets 211,200 — 211,200 (209,000 ) — 2,200 Liabilities Written options $ (209,000 ) $ — $ (209,000 ) $ 209,000 $ — $ — Total liabilities (209,000 ) — (209,000 ) 209,000 — — Net fair value $ 2,200 Gross Amounts not Offset in the Statements of Financial Condition December 31, 2016 Gross Amounts Recognized Gross Amounts Offset in the Statements of Financial condition Amounts Presented in the Statements of Financial condition Financial Instruments Cash Collateral Net Amount Assets Options purchased $ 621,000 $ — $ 621,000 $ (699,200 ) $ — $ (78,200 ) Total assets 621,000 — 621,000 (699,200 ) — (78,200 ) Liabilities Written options $ (699,200 ) $ — $ (699,200 ) $ 699,200 $ — $ — Total liabilities (699,200 ) — (699,200 ) 699,200 — — Net fair value $ (78,200 ) The following table indicates the gross fair values of derivative instruments of option contracts as separate assets and liabilities as of December 31, 2017 and 2016: 2017 2016 Assets Options Purchased Indices $ 211,200 $ 621,000 Total options purchased $ 211,200 $ 621,000 * * This amount is included in “Options purchased, at fair value” on the Statements of Financial Condition. 2017 2016 Liabilities Written Options Indices $ (209,000 ) $ (699,200 ) Total written options $ (209,000 ) ** $ (699,200 ) ** ** This amount is included in “Written options, at fair value” on the Statements of Financial Condition. The following table indicates the trading gains and losses, by market sector, on derivative instruments for the years ended December 31, 2017, 2016 and 2015. Sector - Indices 2017 2016 2015 Net realized gains (losses) on closed contracts $ 5,742,840 $ 8,064,452 $ 8,821,652 Change in net unrealized gains (losses) on open contracts 31,648 (30,088 ) 337,103 Total trading results $ 5,774,488 *** $ 8,034,364 *** $ 9,158,755 *** *** This amount is included in “Total trading results” on the Statements of Income and Expenses. The following table rolls forward the transactions in Options Written for the year ended December 31, 2017. Calls Puts Notional (000) Notional (000) Contracts USD Premiums Received Contracts USD Premiums Received Outstanding options, beginning of year 920 $ 548,550 $ 57,500 920 $ 480,470 $ 578,450 Options written 28,262 17,908,253 2,016,813 93,303 54,565,785 28,098,738 Options exercised — — — — — — Options expired (26,950 ) (17,109,586 ) (1,920,188 ) (76,099 ) (44,518,737 ) (22,548,450 ) Options closed (1,792 ) (1,142,850 ) (137,625 ) (17,068 ) (9,867,518 ) (5,987,938 ) Outstanding options, end of year 440 $ 204,367 $ 16,500 1,056 $ 660,000 $ 140,800

Subscriptions, Distributions an

Subscriptions, Distributions and Redemptions	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Subscriptions, Distributions and Redemptions	5. Subscriptions, Distributions and Redemptions: Subscriptions are accepted monthly from investors and they 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 as of the end of a 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, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Financial Highlights	6. Financial Highlights: Changes in the net asset value per Unit for the years ended December 31, 2017, 2016 and 2015 were as follows: 2017 2017 2016 2016 2015 2015 Class A Class D Class A Class D Class A Class D Net realized and unrealized gains (losses) $ 106.31 $ 112.95 $ 123.94 $ 130.97 $ 96.20 $ 100.13 Interest Income 5.76 6.13 2.52 2.68 0.34 0.36 Expenses and allocation to Special Limited Partner (93.86 ) (86.97 ) (74.76 ) (66.46 ) (71.72 ) (59.36 ) Increase (decrease) for the period 18.21 32.11 51.70 67.19 24.82 41.13 Net asset value per unit, beginning of period 1,234.93 1,309.33 1,183.23 1,242.14 1,158.41 1,201.01 Net asset value per unit, end of period $ 1,253.14 $ 1,341.44 $ 1,234.93 $ 1,309.33 $ 1,183.23 $ 1,242.14 Certain prior period amounts have been reclassified to conform to current period presentation. In the financial highlights, the ongoing selling agent fees and clearing fees which were previously included in net realized and unrealized gains (losses) per unit and excluded from expenses per unit are now excluded from net realized and unrealized gains (losses) per unit and included in expenses per unit. This information was previously included as a footnote to the financial highlights table. 2017 2017 2016 2016 2015 2015 Class A Class D Class A Class D Class A Class D Ratios to Average Net Assets: Net investment income (loss) ** (6.4 )% (6.6 )% (6.1 )% (4.7 )% (6.1 )% (5.4 )% Allocation to Special Limited Partner (0.7 )% (1.6 )% — % (0.3 )% — % — % Net investment income (loss) after allocation to Special Limited Partner** (7.1 )% (8.2 )% (6.1 )% (5.0 )% (6.1 )% (5.4 )% Operating expenses 6.8 % 7.2 % 6.3 % 4.9 % 6.1 % 5.4 % Allocation to Special Limited Partner 0.7 % 1.6 % — % 0.3 % — % — % Total expenses 7.5 % 8.8 % 6.3 % 5.2 % 6.1 % 5.4 % Total return : Total return before allocation to Special Limited Partner 2.3 % 4.1 % 4.4 % 5.6 % 2.1 % 3.4 % Allocation to Special Limited Partner (0.8 )% (1.6 )% — % (0.2 )% — % — % Total return after allocation to Special Limited Partner 1.5 % 2.5 % 4.4 % 5.4 % 2.1 % 3.4 % ** Interest income less total expenses (exclusive of allocation to Special Limited Partner, if applicable). 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 Classes using the Limited Partners’ share of income, expenses and average net assets.

Financial Instrument Risks

Financial Instrument Risks	12 Months Ended
	Dec. 31, 2017
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Financial Instrument Risks	7. Financial Instrument Risks In the normal course of business, the Partnership is party to financial instruments with off-balance sheet risk, including derivative financial instruments and derivative commodity instruments. These financial instruments may include futures and options, 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 or OTC. Exchange-traded instruments include futures and certain standardized swap, forward and option contracts. OTC contracts are negotiated between contracting parties and also include certain forward 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 Partnership’s current contracts are traded OTC, although contracts may be traded OTC in the future. Market risk is the potential for changes in the value of the financial instruments traded by the Partnership due to market changes, including interest 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 is exposed to a market risk equal to the value of futures 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 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 risk of loss is reduced through the use of legally enforceable master netting agreements with counterparties that permit the Partnership to offset unrealized gains and losses and other assets and liabilities with such counterparties upon the occurrence of certain events. The Partnership had credit risk and concentration risk during the reporting period and prior periods, as Wells Fargo, Wedbush, ADM and/or MS&Co. or their affiliates were counterparties or brokers with respect to the Partnership’s assets. Credit risk with respect to exchange-traded instruments is reduced to the extent that, through Wells Fargo, Wedbush, ADM and/or MS&Co., the Partnership’s counterparty is an exchange or clearing organization. The Partnership continues to be subject to such risks with respect to Wedbush and ADM. The Partnership’s trading will be concentrated in exchange-traded futures and options on the S&P 500 ® As both a buyer and seller of options, the Partnership 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 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 does not consider these contracts to be guarantees. The General Partner monitors and attempts to control the Partnership’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 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, forward and option contracts by sector, margin requirements, gain and loss transactions and collateral positions. 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. This limited liability is a result of the organization of the Partnership as a limited partnership under New York law. The majority of these instruments mature within one year of the inception date. However, due to the nature of the Partnership’s business, these instruments may not be held to maturity.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	8. Subsequent Events: Effective on or about March 26, 2018, the Wells Fargo Customer Agreement was terminated. The Partnership engaged in futures and options trading through commodity brokerage accounts maintained at Wells Fargo. The Wells Fargo Customer Agreement was terminated because the Partnership is no longer engaged in such trading through accounts at Wells Fargo. The Partnership continues to engage in such trading through commodity brokerage accounts at Wedbush and ADM. .

Accounting Policies (Policies)

Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2017
Use of Estimates	a. Use of Estimates.
Partnership's Investments	b. Partnership’s Investments.
Partnership's Fair Value Measurements	c. Partnership’s Fair Value Measurements. 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 considers prices for exchange-traded commodity futures and option contracts to be based on unadjusted quoted prices in active markets for identical assets and liabilities (Level 1). The values of futures and certain option contracts for which market quotations are not readily available are priced by broker-dealers that derive fair values for those assets and liabilities from observable inputs (Level 2). As of and for the years ended December 31, 2017 and 2016, the Partnership did not hold any derivative instruments for which market quotations were not readily available and which were priced by broker-dealers that derive fair values for those assets from observable inputs (Level 2) or that were priced at fair value using unobservable inputs through the application of the General Partner’s assumptions and internal valuation pricing models (Level 3). As such a rollforward of Level 3 derivative instruments was not presented, nor was a table presenting unobservable inputs used by management in the fair value measurement process. During the years ended December 31, 2017 and 2016, there were no transfers of assets or liabilities between Level 1 and Level 2. December 31, 2017 Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Investments in U.S. government securities, at fair value $ 25,107,663 $ — $ 25,107,663 $ — Options purchased 211,200 211,200 — — Total assets 25,318,863 211,200 25,107,663 — Liabilities Written options $ 209,000 $ 209,000 $ — $ — Total liabilities 209,000 209,000 — — Net fair value $ 25,109,863 $ 2,200 $ 25,107,663 $ — December 31, 2016 Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Investments in U.S. government securities, at fair value $ 34,993,486 $ — $ 34,993,486 $ — Options purchased 621,000 621,000 — — Total assets 35,614,486 621,000 34,993,486 — Liabilities Written options $ 699,200 $ 699,200 $ — $ — Total liabilities 699,200 699,200 — — Net fair value $ 34,915,286 $ (78,200 ) $ 34,993,486 $ —
Futures Contracts	d. Futures Contracts ®
Options	e. Options
Income Taxes	f. Income Taxes 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 2013 through 2017 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.
Investment Company Status	h. Investment Company Status Financial Services — Investment Companies (“Topic 946”): Amendments to the Scope, Measurement and Disclosure Requirements
United States Treasury Bills [Member]
United States Treasury Bills	g. United States Treasury Bills

Accounting Policies (Tables)

Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Derivative Fair Value of Assets and Liabilities Using Unobservable Inputs	During the years ended December 31, 2017 and 2016, there were no transfers of assets or liabilities between Level 1 and Level 2. December 31, 2017 Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Investments in U.S. government securities, at fair value $ 25,107,663 $ — $ 25,107,663 $ — Options purchased 211,200 211,200 — — Total assets 25,318,863 211,200 25,107,663 — Liabilities Written options $ 209,000 $ 209,000 $ — $ — Total liabilities 209,000 209,000 — — Net fair value $ 25,109,863 $ 2,200 $ 25,107,663 $ — December 31, 2016 Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets Investments in U.S. government securities, at fair value $ 34,993,486 $ — $ 34,993,486 $ — Options purchased 621,000 621,000 — — Total assets 35,614,486 621,000 34,993,486 — Liabilities Written options $ 699,200 $ 699,200 $ — $ — Total liabilities 699,200 699,200 — — Net fair value $ 34,915,286 $ (78,200 ) $ 34,993,486 $ —

Trading Activities (Tables)

Trading Activities (Tables)	12 Months Ended
	Dec. 31, 2017
Brokers And Dealers [Abstract]
Summary of Valuation of Partnership's Investments	The following tables summarize the valuation of the Partnership’s investments as of December 31, 2017 and 2016: Gross Amounts not Offset in the Statements of Financial Condition December 31, 2017 Gross Amounts Recognized Gross Amounts Offset in the Statements of Financial condition Amounts Presented in the Statements of Financial condition Financial Instruments Cash Collateral Net Amount Assets Options purchased $ 211,200 $ — $ 211,200 $ (209,000 ) $ — $ 2,200 Total assets 211,200 — 211,200 (209,000 ) — 2,200 Liabilities Written options $ (209,000 ) $ — $ (209,000 ) $ 209,000 $ — $ — Total liabilities (209,000 ) — (209,000 ) 209,000 — — Net fair value $ 2,200 Gross Amounts not Offset in the Statements of Financial Condition December 31, 2016 Gross Amounts Recognized Gross Amounts Offset in the Statements of Financial condition Amounts Presented in the Statements of Financial condition Financial Instruments Cash Collateral Net Amount Assets Options purchased $ 621,000 $ — $ 621,000 $ (699,200 ) $ — $ (78,200 ) Total assets 621,000 — 621,000 (699,200 ) — (78,200 ) Liabilities Written options $ (699,200 ) $ — $ (699,200 ) $ 699,200 $ — $ — Total liabilities (699,200 ) — (699,200 ) 699,200 — — Net fair value $ (78,200 )
Gross Fair Values of Derivative Instruments of Option Contracts as Separate Assets and Liabilities	The following table indicates the gross fair values of derivative instruments of option contracts as separate assets and liabilities as of December 31, 2017 and 2016: 2017 2016 Assets Options Purchased Indices $ 211,200 $ 621,000 Total options purchased $ 211,200 $ 621,000 * * This amount is included in “Options purchased, at fair value” on the Statements of Financial Condition. 2017 2016 Liabilities Written Options Indices $ (209,000 ) $ (699,200 ) Total written options $ (209,000 ) ** $ (699,200 ) ** ** This amount is included in “Written options, at fair value” on the Statements of Financial Condition.
Trading Gains and Losses, by Market Sector, on Derivative Instruments	The following table indicates the trading gains and losses, by market sector, on derivative instruments for the years ended December 31, 2017, 2016 and 2015. Sector - Indices 2017 2016 2015 Net realized gains (losses) on closed contracts $ 5,742,840 $ 8,064,452 $ 8,821,652 Change in net unrealized gains (losses) on open contracts 31,648 (30,088 ) 337,103 Total trading results $ 5,774,488 *** $ 8,034,364 *** $ 9,158,755 *** *** This amount is included in “Total trading results” on the Statements of Income and Expenses.
Summary of Transactions in Options Written	The following table rolls forward the transactions in Options Written for the year ended December 31, 2017. Calls Puts Notional (000) Notional (000) Contracts USD Premiums Received Contracts USD Premiums Received Outstanding options, beginning of year 920 $ 548,550 $ 57,500 920 $ 480,470 $ 578,450 Options written 28,262 17,908,253 2,016,813 93,303 54,565,785 28,098,738 Options exercised — — — — — — Options expired (26,950 ) (17,109,586 ) (1,920,188 ) (76,099 ) (44,518,737 ) (22,548,450 ) Options closed (1,792 ) (1,142,850 ) (137,625 ) (17,068 ) (9,867,518 ) (5,987,938 ) Outstanding options, end of year 440 $ 204,367 $ 16,500 1,056 $ 660,000 $ 140,800

Financial Highlights (Tables)

Financial Highlights (Tables)	12 Months Ended
	Dec. 31, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Schedule of Financial Highlights for Each Class	Changes in the net asset value per Unit for the years ended December 31, 2017, 2016 and 2015 were as follows: 2017 2017 2016 2016 2015 2015 Class A Class D Class A Class D Class A Class D Net realized and unrealized gains (losses) $ 106.31 $ 112.95 $ 123.94 $ 130.97 $ 96.20 $ 100.13 Interest Income 5.76 6.13 2.52 2.68 0.34 0.36 Expenses and allocation to Special Limited Partner (93.86 ) (86.97 ) (74.76 ) (66.46 ) (71.72 ) (59.36 ) Increase (decrease) for the period 18.21 32.11 51.70 67.19 24.82 41.13 Net asset value per unit, beginning of period 1,234.93 1,309.33 1,183.23 1,242.14 1,158.41 1,201.01 Net asset value per unit, end of period $ 1,253.14 $ 1,341.44 $ 1,234.93 $ 1,309.33 $ 1,183.23 $ 1,242.14
Summary of Ratios to Average Net Assets	2017 2017 2016 2016 2015 2015 Class A Class D Class A Class D Class A Class D Ratios to Average Net Assets: Net investment income (loss) ** (6.4 )% (6.6 )% (6.1 )% (4.7 )% (6.1 )% (5.4 )% Allocation to Special Limited Partner (0.7 )% (1.6 )% — % (0.3 )% — % — % Net investment income (loss) after allocation to Special Limited Partner** (7.1 )% (8.2 )% (6.1 )% (5.0 )% (6.1 )% (5.4 )% Operating expenses 6.8 % 7.2 % 6.3 % 4.9 % 6.1 % 5.4 % Allocation to Special Limited Partner 0.7 % 1.6 % — % 0.3 % — % — % Total expenses 7.5 % 8.8 % 6.3 % 5.2 % 6.1 % 5.4 % Total return : Total return before allocation to Special Limited Partner 2.3 % 4.1 % 4.4 % 5.6 % 2.1 % 3.4 % Allocation to Special Limited Partner (0.8 )% (1.6 )% — % (0.2 )% — % — % Total return after allocation to Special Limited Partner 1.5 % 2.5 % 4.4 % 5.4 % 2.1 % 3.4 % ** Interest income less total expenses (exclusive of allocation to Special Limited Partner, if applicable).

Partnership Organization - Addi

Partnership Organization - Additional Information (Detail) - USD ($)	Mar. 31, 2015	Dec. 31, 2017	Dec. 31, 2016
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Incentive fee	20.00%	20.00%
Net asset value		$ 60,344,765	$ 73,580,357
Minimum [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Decrease in net asset value per Redeemable Unit		$ 400
Net asset value		$ 1,000,000
Partnership liquidation date		Dec. 31, 2025

Accounting Policies - Additiona

Accounting Policies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Accounting Policy [Line Items]
Transfers of assets between Level 1 and Level 2	$ 0	$ 0
Transfers of liabilities between Level 1 and Level 2	0	$ 0
Provision for income tax	$ 0
Latest Tax Year [Member]
Accounting Policy [Line Items]
Tax years remain subject to examination	2,017
Earliest Tax Year [Member]
Accounting Policy [Line Items]
Tax years remain subject to examination	2,013

Accounting Policies - Derivativ

Accounting Policies - Derivative Fair Value of Assets and Liabilities Using Unobservable Inputs (Detail) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	$ 25,318,863	$ 35,614,486
Liabilities	209,000	699,200
Net fair value	25,109,863	34,915,286
Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	211,200	621,000
Liabilities	209,000	699,200
Net fair value	2,200	(78,200)
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	25,107,663	34,993,486
Net fair value	25,107,663	34,993,486
U.S. Government Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	25,107,663	34,993,486
U.S. Government Securities [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	25,107,663	34,993,486
Options Purchased Indices [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	211,200	621,000
Options Purchased Indices [Member] | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	211,200	621,000
Written Options [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities	209,000	699,200
Written Options [Member] | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities	$ 209,000	$ 699,200

Agreements - Additional Informa

Agreements - Additional Information (Detail) - USD ($)	Mar. 31, 2015	Sep. 30, 2014	Dec. 31, 2015	Mar. 31, 2014	Sep. 30, 2014	Dec. 31, 2017	Dec. 31, 2016
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Monthly advisory fees						0.167%
Advisory fees per year						2.00%
Incentive fee	20.00%					20.00%
Cash held for margin						$ 9,145,348	$ 11,471,701
Limited Partnership [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Management fees on assets		0.50%				1.00%
Management fees paid		0.50%				1.00%
Administrative fees paid		0.08333%				0.08333%
Customer Agreement [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Percentage of allocated shares						80.00%
Customer Agreement [Member] | Wells Fargo [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Percentage of allocated shares						90.00%
Cash held for margin						$ 8,446,588	11,471,701
Treasury bills maturity period						90 days
Customer Agreement [Member] | Wedbush [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Cash held for margin						$ 218,362	480,398
Customer Agreement [Member] | ADM [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Cash held for margin						$ 0	$ 0
Customer Agreement [Member] | Robert W- Baird And Company [Member] | Class A [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Percentage of maintenance fee						0.1667%
Maintenance fees per year						2.00%
Customer Agreement [Member] | Robert W- Baird And Company [Member] | Class D [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Percentage of maintenance fee						0.0625%
Maintenance fees per year						0.75%
Selling Agreement [Member] | Morgan Stanley Wealth Management [Member] | Class A [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Percentage of ongoing selling agent fees			0.1667%	0.3125%	0.2083%
Ongoing selling agent fees per year			2.00%	3.75%	2.50%
Selling Agreement [Member] | Morgan Stanley Wealth Management [Member] | Class D [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Percentage of ongoing selling agent fees			0.0625%	0.125%	0.10417%
Ongoing selling agent fees per year			0.75%	1.50%	1.25%
Selling Agreement [Member] | Robert W- Baird And Company [Member] | Class A [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Percentage of ongoing selling agent fees						0.1667%
Ongoing selling agent fees per year						2.00%
Selling Agreement [Member] | Robert W- Baird And Company [Member] | Class D [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Percentage of ongoing selling agent fees						0.0625%
Ongoing selling agent fees per year						0.75%
Continuing Services Agreement [Member] | Morgan Stanley Wealth Management [Member] | Class A [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Percentage of ongoing selling agent fees						0.1667%
Ongoing selling agent fees per year						2.00%
Continuing Services Agreement [Member] | Morgan Stanley Wealth Management [Member] | Class D [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Percentage of ongoing selling agent fees						0.0625%
Ongoing selling agent fees per year						0.75%
Continuing Services Agreement [Member] | Credit Suisse Securities (USA) LLC [Member] | Class A [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Percentage of ongoing selling agent fees						0.1667%
Ongoing selling agent fees per year						2.00%
Continuing Services Agreement [Member] | Credit Suisse Securities (USA) LLC [Member] | Class D [Member]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Percentage of ongoing selling agent fees						0.0625%
Ongoing selling agent fees per year						0.75%

Trading Activities - Additional

Trading Activities - Additional Information (Detail) - Contract	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Brokers And Dealers [Abstract]
Monthly average number of option contracts held	3,506	2,357

Trading Activities - Summary of

Trading Activities - Summary of Valuation of Partnership's Investments (Detail) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Gross Amounts Recognized, Assets	$ 211,200	$ 621,000
Gross Amounts Offset in the Statement of Financial Condition, Assets	0	0
Amounts Presented in the Statement of Financial Condition, Assets	211,200	621,000
Financial Instruments, Assets	(209,000)	(699,200)
Cash Collateral, Assets	0	0
Net Amount, Assets	2,200	(78,200)
Gross Amounts Recognized, Liabilities	(209,000)	(699,200)
Gross Amounts Offset in the Statement of Financial Condition, Liabilities	0	0
Amounts Presented in the Statement of Financial Condition, Liabilities	(209,000)	(699,200)
Financial Instruments, Liabilities	209,000	699,200
Cash Collateral, Liabilities	0	0
Net Amount, Liabilities	0	0
Net fair value	2,200	(78,200)
Options Purchased [Member]
Derivative [Line Items]
Gross Amounts Recognized, Assets	211,200	621,000
Gross Amounts Offset in the Statement of Financial Condition, Assets	0	0
Amounts Presented in the Statement of Financial Condition, Assets	211,200	621,000
Financial Instruments, Assets	(209,000)	(699,200)
Cash Collateral, Assets	0	0
Net Amount, Assets	2,200	(78,200)
Written Options [Member]
Derivative [Line Items]
Gross Amounts Recognized, Liabilities	(209,000)	(699,200)
Gross Amounts Offset in the Statement of Financial Condition, Liabilities	0	0
Amounts Presented in the Statement of Financial Condition, Liabilities	(209,000)	(699,200)
Financial Instruments, Liabilities	209,000	699,200
Cash Collateral, Liabilities	0	0
Net Amount, Liabilities	$ 0	$ 0

Trading Activities - Gross Fair

Trading Activities - Gross Fair Values of Derivative Instruments of Option Contracts as Separate Assets and Liabilities (Detail) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Options Purchased Indices [Member]
Assets
Total options purchased	$ 211,200	$ 621,000
Options Purchased [Member]
Assets
Total options purchased	211,200	621,000
Written Options Indices [Member]
Liabilities
Total written options	(209,000)	(699,200)
Written Options [Member]
Liabilities
Total written options	$ (209,000)	$ (699,200)

Trading Activities - Trading Ga

Trading Activities - Trading Gains and Losses, by Market Sector, on Derivative Instruments (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Summary Of Investment Holdings [Line Items]
Net realized gains (losses) on closed contracts	$ 5,742,840	$ 8,064,452	$ 8,821,652
Change in net unrealized gains (losses) on open contracts	31,648	(30,088)	337,103
Total trading results	5,774,488	8,034,364	9,158,755
Indices [Member]
Summary Of Investment Holdings [Line Items]
Net realized gains (losses) on closed contracts	5,742,840	8,064,452	8,821,652
Change in net unrealized gains (losses) on open contracts	31,648	(30,088)	337,103
Total trading results	$ 5,774,488	$ 8,034,364	$ 9,158,755

Trading Activities - Summary 29

Trading Activities - Summary of Transactions in Options Written (Detail)	12 Months Ended
	Dec. 31, 2017USD ($)Contract
Summary Of Investment Holdings [Line Items]
Outstanding options, Premiums Received, beginning of year	$ 635,950
Outstanding options, Premiums Received, end of year	$ 157,300
Calls [Member]
Summary Of Investment Holdings [Line Items]
Outstanding options, Contracts, beginning of year | Contract	920
Options written, Contracts | Contract	28,262
Options expired, Contracts | Contract	(26,950)
Options closed, Contracts | Contract	(1,792)
Outstanding options, Contracts, end of year | Contract	440
Outstanding options, Notional, beginning of year	$ 548,550,000
Options written, Notional	17,908,253,000
Options expired, Notional	(17,109,586,000)
Options closed, Notional	(1,142,850,000)
Outstanding options, Notional, end of year	204,367,000
Outstanding options, Premiums Received, beginning of year	57,500
Options written, Premiums Received	2,016,813
Options expired, Premiums Received	(1,920,188)
Options closed, Premiums Received	(137,625)
Outstanding options, Premiums Received, end of year	$ 16,500
Puts [Member]
Summary Of Investment Holdings [Line Items]
Outstanding options, Contracts, beginning of year | Contract	920
Options written, Contracts | Contract	93,303
Options expired, Contracts | Contract	(76,099)
Options closed, Contracts | Contract	(17,068)
Outstanding options, Contracts, end of year | Contract	1,056
Outstanding options, Notional, beginning of year	$ 480,470,000
Options written, Notional	54,565,785,000
Options expired, Notional	(44,518,737,000)
Options closed, Notional	(9,867,518,000)
Outstanding options, Notional, end of year	660,000,000
Outstanding options, Premiums Received, beginning of year	578,450
Options written, Premiums Received	28,098,738
Options expired, Premiums Received	(22,548,450)
Options closed, Premiums Received	(5,987,938)
Outstanding options, Premiums Received, end of year	$ 140,800

Subscriptions, Distributions 30

Subscriptions, Distributions and Redemptions - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017USD ($)
Equity [Abstract]
Redemptions fee charged to limited partners	$ 0
Period of notice to redeem limited Partnership	3 days

Financial Highlights - Schedule

Financial Highlights - Schedule of Financial Highlights for Each Class (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Class A [Member]
Class of Stock [Line Items]
Net realized and unrealized gains (losses)	$ 106.31	$ 123.94	$ 96.20
Interest Income	5.76	2.52	0.34
Expenses and allocation to Special Limited Partner	(93.86)	(74.76)	(71.72)
Increase (decrease) for the period	18.21	51.70	24.82
Net asset value per unit, beginning of period	1,234.93	1,183.23	1,158.41
Net asset value per unit, end of period	1,253.14	1,234.93	1,183.23
Class D [Member]
Class of Stock [Line Items]
Net realized and unrealized gains (losses)	112.95	130.97	100.13
Interest Income	6.13	2.68	0.36
Expenses and allocation to Special Limited Partner	(86.97)	(66.46)	(59.36)
Increase (decrease) for the period	32.11	67.19	41.13
Net asset value per unit, beginning of period	1,309.33	1,242.14	1,201.01
Net asset value per unit, end of period	$ 1,341.44	$ 1,309.33	$ 1,242.14

Financial Highlights - Summary

Financial Highlights - Summary of Ratios to Average Net Assets (Detail)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Class A [Member]
Ratios to Average Net Assets:
Ratios to Average Net Assets, Net investment income (loss)	(6.40%)	(6.10%)	(6.10%)
Ratios to Average Net Assets, Net investment income (loss), Allocation to Special Limited Partner	(0.70%)	0.00%	0.00%
Ratios to Average Net Assets, Net investment income (loss) after allocation to Special Limited Partner	(7.10%)	(6.10%)	(6.10%)
Ratios to Average Net Assets, Operating expenses	6.80%	6.30%	6.10%
Ratios to Average Net Assets, Operating expenses, Allocation to Special Limited Partner	0.70%	0.00%	0.00%
Ratios to Average Net Assets, Total expenses	7.50%	6.30%	6.10%
Total return :
Total return before allocation to Special Limited Partner	2.30%	4.40%	2.10%
Total return, Allocation to Special Limited Partner	(0.80%)	0.00%	0.00%
Total return after allocation to Special Limited Partner	1.50%	4.40%	2.10%
Class D [Member]
Ratios to Average Net Assets:
Ratios to Average Net Assets, Net investment income (loss)	(6.60%)	(4.70%)	(5.40%)
Ratios to Average Net Assets, Net investment income (loss), Allocation to Special Limited Partner	(1.60%)	(0.30%)	0.00%
Ratios to Average Net Assets, Net investment income (loss) after allocation to Special Limited Partner	(8.20%)	(5.00%)	(5.40%)
Ratios to Average Net Assets, Operating expenses	7.20%	4.90%	5.40%
Ratios to Average Net Assets, Operating expenses, Allocation to Special Limited Partner	1.60%	0.30%	0.00%
Ratios to Average Net Assets, Total expenses	8.80%	5.20%	5.40%
Total return :
Total return before allocation to Special Limited Partner	4.10%	5.60%	3.40%
Total return, Allocation to Special Limited Partner	(1.60%)	(0.20%)	0.00%
Total return after allocation to Special Limited Partner	2.50%	5.40%	3.40%

Financial Instrument Risks - Ad

Financial Instrument Risks - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Maximum maturity period of financial instruments	1 year

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017
Wells Fargo [Member] | Customer Agreement [Member]
Subsequent Event [Line Items]
Customer agreement termination date	Mar. 26, 2018