Derivative Instruments and Hedging Activities (Tables)

3 Months Ended

Mar. 31, 2016

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

Derivatives not designated as hedging instruments:

As of March 31, 2016
	Asset		Liability
Type of	Derivatives		Derivatives			Net
Futures Contracts	Fair Value		Fair Value			Fair Value
Agriculture	$	86,380	$	(102,038	)	$	(15,658	)
Currency		12,830		(11,688	)		1,142
Energy		47,251		(59,953	)		(12,702	)
Indices		43,064		(4,547	)		38,517
Interest rates		9,015		(14,181	)		(5,166	)
Metals		-		(16,078	)		(16,078	)
	$	198,540	$	(208,485	)	$	(9,945	)

As of December 31, 2015
	Asset		Liability
Type of	Derivatives		Derivatives			Net
Futures Contracts	Fair Value		Fair Value			Fair Value
Agriculture	$	32,649	$	(61,049	)	$	(28,400	)
Currency		26,412		(863	)		25,549
Energy		104,889		(74,035	)		30,854
Indices		5,225		(23,774	)		(18,549	)
Interest rates		4,782		(21,653	)		(16,871	)
Metals		11,985		(9,213	)		2,772
	$	185,942	$	(190,587	)	$	(4,645	)

Schedule of Derivative Instruments Included in Trading Activities [Table Text Block]

Trading gain (loss) for the following periods:

	Three Months Ended March 31,
Type of Futures Contracts	2016			2015
Agriculture	$	(28,617	)	$	27,009
Currency		54,881			(21,830	)
Energy		100,861			144
Indices		288,800			238,957
Interest rates		211,092			353,411
Metals		11,169			(131,405	)
	$	638,186		$	466,286