Derivative Instruments and Hedging Activities (Tables)

6 Months Ended

Jun. 30, 2015

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 June 30, 2015
	Asset		Liability
Type of	Derivatives		Derivatives			Net
Futures Contracts	Fair Value		Fair Value			Fair Value
Agriculture	$	204,347	$	(161,406	)	$	42,941
Currency		29,627		(29,551	)		76
Energy		18,537		(32,131	)		(13,594	)
Indices		7,351		(42,097	)		(34,746	)
Interest Rates		3,618		(12,052	)		(8,434	)
Metals		9,010		(750	)		8,260
	$	272,490	$	(277,987	)	$	(5,497	)

As of December 31, 2014
	Asset		Liability
Type of	Derivatives		Derivatives			Net
Futures Contracts	Fair Value		Fair Value			Fair Value
Agriculture	$	119,669	$	(95,121	)	$	24,548
Currency		60,876		(31,502	)		29,374
Energy		218,011		(15,424	)		202,587
Indices		12,875		(13,050	)		(175	)
Interest Rates		168,536		(2,275	)		166,261
Metals		44,235		(875	)		43,360
	$	624,202	$	(158,247	)	$	465,955

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

Trading gain (loss) for the following periods:

	Six Months Ended June 30,
Type of Futures Contracts	2015			2014
Agriculture	$	(18,170	)	$	21,979
Currency		(298,355	)		47,491
Energy		(54,835	)		(253,590	)
Indices		(19,455	)		(606,093	)
Interest Rates		107,464			17,449
Metals		(155,242	)		(329,162	)
	$	(438,593	)	$	(1,101,926	)

	Three Months Ended June 30,
Type of Futures Contracts	2015			2014
Agriculture	$	(45,178	)	$	85,934
Currency		(276,525	)		21,774
Energy		(54,979	)		(93,929	)
Indices		(258,412	)		62,045
Interest Rates		(245,948	)		250,587
Metals		(23,837	)		(141,499	)
	$	(904,879	)	$	184,912