Derivatives and Hedging - Schedule of Effect of Trading Activities on the Statements of Income and Expenses (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Derivative [Line Items]
Trading Results	$ 1,656,125	$ 9,640,376	$ 327,931	$ 6,333,503
Net realized	(4,865,629)	8,004,639	2,756,600	5,594,451
Net change in unrealized	6,521,754	1,635,737	(2,428,669)	739,052
Total Trading Results	1,656,125	9,640,376	327,931	6,333,503
Commodity [Member]
Derivative [Line Items]
Trading Results	2,165,636	4,004,766	(4,110,606)	4,169,820
Equity [Member]
Derivative [Line Items]
Trading Results	(3,442,268)	13,041	(1,424,424)	(1,899,782)
Foreign Currency [Member]
Derivative [Line Items]
Trading Results	482,957	4,508,660	3,172,201	1,527,221
Interest Rate [Member]
Derivative [Line Items]
Trading Results	$ 2,449,800	$ 1,113,909	$ 2,690,760	$ 2,536,244