Consolidated Statements of Changes in Partners' Capital (Net Asset Value) - USD ($)	Class A General Partner	Class A Limited Partners	Class A	Class B Limited Partners	Class B	Legacy 1 Class General Partner	Legacy 1 Class Limited Partners	Legacy 1 Class	Legacy 2 Class General Partner	Legacy 2 Class Limited Partners	Legacy 2 Class	Global 1 Class General Partner	Global 1 Class Limited Partners	Global 1 Class	Global 2 Class General Partner	Global 2 Class Limited Partners	Global 2 Class	Global 3 Class Limited Partners	Global 3 Class	Total
Increase (Decrease) in Partners' Capital
Net asset value per unit at end of period (in dollars per unit)			$ 1,050.40		$ 857.37			$ 842.06			$ 822.36			$ 835.42			$ 818.12		$ 702.50
Partners' capital, (net asset value) at Dec. 31, 2017	$ 322,836					$ 483,449			$ 216,389			$ 392,629			$ 189,644
Partners' capital, (net asset value) (in units) at Dec. 31, 2017	307.34					574.13			263.13			469.97			231.81
Partners' capital, (net asset value) at Dec. 31, 2017		$ 7,161,658		$ 72,443,010			$ 654,458			$ 180,172			$ 25,189,596			$ 875,122		$ 5,374,659
Partners' capital, (net asset value) (in units) at Dec. 31, 2017		6,818.01		84,494.74			777.22			219.09			30,151.86			1,069.68		7,650.73
Partners' capital, (net asset value) at Dec. 31, 2017																				$ 113,483,622
Increase (Decrease) in Partners' Capital
Contributions													$ 2,350,057							2,350,057
Contributions (in units)													2,683.69
Redemptions		$ (1,004,155)		$ (3,941,112)									$ (2,425,901)			$ (29,267)		$ (3,461,980)		(10,862,415)
Redemptions (in units)		(888.51)		(4,661.87)									(2,960.01)			(37.27)		(4,831.51)
Net income (loss)	$ (18,895)	$ (293,688)		$ (4,167,282)		$ (25,621)	$ (34,684)		$ (11,587)	$ (9,647)		$ (18,899)	$ (1,356,406)		$ (9,271)	$ (42,511)		$ (37,360)		(6,025,851)
Partners' capital, (net asset value) at Mar. 31, 2018	$ 303,941					$ 457,828			$ 204,802			$ 373,730			$ 180,373
Partners' capital, (net asset value) (in units) at Mar. 31, 2018	307.34					574.13			263.13			469.97			231.81
Partners' capital, (net asset value) at Mar. 31, 2018		$ 5,863,815		$ 64,334,616			$ 619,774			$ 170,525			$ 23,757,346			$ 803,344		$ 1,875,319
Partners' capital, (net asset value) (in units) at Mar. 31, 2018		5,929.50		79,832.87			777.22			219.09			29,875.54			1,032.41		2,819.22
Partners' capital, (net asset value) at Mar. 31, 2018																				98,945,413
Partners' capital, (net asset value) at Dec. 31, 2017	$ 322,836					$ 483,449			$ 216,389			$ 392,629			$ 189,644
Partners' capital, (net asset value) (in units) at Dec. 31, 2017	307.34					574.13			263.13			469.97			231.81
Partners' capital, (net asset value) at Dec. 31, 2017		$ 7,161,658		$ 72,443,010			$ 654,458			$ 180,172			$ 25,189,596			$ 875,122		$ 5,374,659
Partners' capital, (net asset value) (in units) at Dec. 31, 2017		6,818.01		84,494.74			777.22			219.09			30,151.86			1,069.68		7,650.73
Partners' capital, (net asset value) at Dec. 31, 2017																				113,483,622
Increase (Decrease) in Partners' Capital
Net income (loss)																				(6,484,583)
Partners' capital, (net asset value) at Sep. 30, 2018	$ 301,910					$ 460,063			$ 205,544			$ 376,597			$ 181,526
Partners' capital, (net asset value) (in units) at Sep. 30, 2018	307.34					574.13			263.13			469.97			231.81
Partners' capital, (net asset value) at Sep. 30, 2018		$ 4,666,989		$ 56,399,218			$ 595,706			$ 171,141			$ 20,929,765			$ 695,041		$ 888,471
Partners' capital, (net asset value) (in units) at Sep. 30, 2018		4,751.01		70,687.62			743.40			219.09			26,119.41			887.55		1,338.78
Partners' capital, (net asset value) at Sep. 30, 2018																				85,871,971
Increase (Decrease) in Partners' Capital
Net asset value per unit at end of period (in dollars per unit)			988.92		805.87			797.43			778.33			795.21			778.12		665.19
Partners' capital, (net asset value) at Mar. 31, 2018	$ 303,941					$ 457,828			$ 204,802			$ 373,730			$ 180,373
Partners' capital, (net asset value) (in units) at Mar. 31, 2018	307.34					574.13			263.13			469.97			231.81
Partners' capital, (net asset value) at Mar. 31, 2018		$ 5,863,815		$ 64,334,616			$ 619,774			$ 170,525			$ 23,757,346			$ 803,344		$ 1,875,319
Partners' capital, (net asset value) (in units) at Mar. 31, 2018		5,929.50		79,832.87			777.22			219.09			29,875.54			1,032.41		2,819.22
Partners' capital, (net asset value) at Mar. 31, 2018																				98,945,413
Increase (Decrease) in Partners' Capital
Contributions		$ 165		$ 1									$ 195,622							195,788
Contributions (in units)		0.17											244.29
Redemptions		$ (9,242)		$ (4,324,387)			$ (26,810)						$ (1,532,745)			$ (67,031)		$ (832,225)		(6,792,440)
Redemptions (in units)		(9.37)		(5,384.47)			(33.82)						(1,938.68)			(85.04)		(1,264.57)
Net income (loss)	$ (652)	$ (12,575)		$ (241,206)		$ 1,665	$ 2,005		$ 617	$ 512		$ 1,877	$ 102,295		$ 792	$ 4,099		$ (8,967)		(149,538)
Partners' capital, (net asset value) at Jun. 30, 2018	$ 303,289					$ 459,493			$ 205,419			$ 375,607			$ 181,165
Partners' capital, (net asset value) (in units) at Jun. 30, 2018	307.34					574.13			263.13			469.97			231.81
Partners' capital, (net asset value) at Jun. 30, 2018		$ 5,842,163		$ 59,769,024			$ 594,969			$ 171,037			$ 22,522,518			$ 740,412		$ 1,034,127
Partners' capital, (net asset value) (in units) at Jun. 30, 2018		5,920.30		74,448.40			743.40			219.09			28,181.15			947.37		1,554.65
Partners' capital, (net asset value) at Jun. 30, 2018																				92,199,223
Increase (Decrease) in Partners' Capital
Net asset value per unit at end of period (in dollars per unit)			986.80		802.83			800.33			780.67			799.21			781.54		665.18
Contributions													$ 47,312							47,312
Contributions (in units)													58.97
Redemptions		$ (1,156,280)		$ (3,015,263)									$ (1,702,887)			$ (46,974)		$ (143,966)		(6,065,370)
Redemptions (in units)		(1,169.29)		(3,760.78)									(2,120.71)			(59.82)		(215.87)
Net income (loss)	$ (1,379)	$ (18,894)		$ (354,543)		$ 570	$ 737		$ 125	$ 104		$ 990	$ 62,822		$ 361	$ 1,603		$ (1,690)		(309,194)
Partners' capital, (net asset value) at Sep. 30, 2018	$ 301,910					$ 460,063			$ 205,544			$ 376,597			$ 181,526
Partners' capital, (net asset value) (in units) at Sep. 30, 2018	307.34					574.13			263.13			469.97			231.81
Partners' capital, (net asset value) at Sep. 30, 2018		$ 4,666,989		$ 56,399,218			$ 595,706			$ 171,141			$ 20,929,765			$ 695,041		$ 888,471
Partners' capital, (net asset value) (in units) at Sep. 30, 2018		4,751.01		70,687.62			743.40			219.09			26,119.41			887.55		1,338.78
Partners' capital, (net asset value) at Sep. 30, 2018																				85,871,971
Increase (Decrease) in Partners' Capital
Net asset value per unit at end of period (in dollars per unit)			982.32		797.87			801.32			781.15			801.31			783.10		663.64
Net asset value per unit at end of period (in dollars per unit)			$ 946.24		$ 767.31			$ 776.34			$ 756.33			$ 777.40			$ 759.26		$ 640.57
Partners' capital, (net asset value) at Dec. 31, 2018	$ 290,822		$ 290,822			$ 445,722		$ 445,722	$ 199,013		$ 199,013	$ 365,357		$ 365,357	$ 176,000		$ 176,000
Partners' capital, (net asset value) (in units) at Dec. 31, 2018	307.34		307.34			574.13		574.13	263.13		263.13	469.97		469.97	231.81		231.81
Partners' capital, (net asset value) at Dec. 31, 2018		$ 4,405,397	$ 4,405,397	$ 51,282,621	$ 51,282,621		$ 563,781	$ 563,781		$ 126,227	$ 126,227		$ 18,898,570	$ 18,898,570		$ 558,876	$ 558,876	$ 622,313	$ 622,313
Partners' capital, (net asset value) (in units) at Dec. 31, 2018		4,655.70	4,655.70	66,834.11	66,834.11		726.20	726.20		166.90	166.90		24,310.14	24,310.14		736.07	736.07	971.50	971.50
Partners' capital, (net asset value) at Dec. 31, 2018																				77,934,699
Increase (Decrease) in Partners' Capital
Contributions													$ 9,565							9,565
Contributions (in units)													12.36
Redemptions		$ (225,961)		$ (3,038,692)		$ (444,997)	$ (2,117)					$ (60,000)	$ (1,369,971)			$ (20,515)		$ (57,800)		(5,220,053)
Redemptions (in units)		(236.85)		(3,936.77)		(574.13)	(2.67)					(77.23)	(1,747.46)			(26.95)		(90.32)
Net income (loss)	$ 4,230	$ 62,667		$ 639,984		$ (725)	$ 11,314		$ 3,735	$ 2,369		$ 6,123	$ 366,002		$ 3,588	$ 11,026		$ 9,378		1,119,691
Partners' capital, (net asset value) at Mar. 31, 2019	$ 295,052								$ 202,748			$ 311,480			$ 179,588
Partners' capital, (net asset value) (in units) at Mar. 31, 2019	307.34								263.13			392.74			231.81
Partners' capital, (net asset value) at Mar. 31, 2019		$ 4,242,103		$ 48,883,913			$ 572,978			$ 128,596			$ 17,904,166			$ 549,387		$ 573,891
Partners' capital, (net asset value) (in units) at Mar. 31, 2019		4,418.85		62,897.34			723.53			166.90			22,575.04			709.12		881.18
Partners' capital, (net asset value) at Mar. 31, 2019																				73,843,902
Partners' capital, (net asset value) at Dec. 31, 2018	$ 290,822		$ 290,822			$ 445,722		$ 445,722	$ 199,013		$ 199,013	$ 365,357		$ 365,357	$ 176,000		$ 176,000
Partners' capital, (net asset value) (in units) at Dec. 31, 2018	307.34		307.34			574.13		574.13	263.13		263.13	469.97		469.97	231.81		231.81
Partners' capital, (net asset value) at Dec. 31, 2018		$ 4,405,397	$ 4,405,397	$ 51,282,621	$ 51,282,621		$ 563,781	$ 563,781		$ 126,227	$ 126,227		$ 18,898,570	$ 18,898,570		$ 558,876	$ 558,876	$ 622,313	$ 622,313
Partners' capital, (net asset value) (in units) at Dec. 31, 2018		4,655.70	4,655.70	66,834.11	66,834.11		726.20	726.20		166.90	166.90		24,310.14	24,310.14		736.07	736.07	971.50	971.50
Partners' capital, (net asset value) at Dec. 31, 2018																				77,934,699
Increase (Decrease) in Partners' Capital
Net income (loss)																				4,293,378
Partners' capital, (net asset value) at Sep. 30, 2019	$ 307,739		$ 307,739						$ 213,562		$ 213,562	$ 329,431		$ 329,431	$ 189,686		$ 189,686
Partners' capital, (net asset value) (in units) at Sep. 30, 2019	307.34		307.34					0.00	263.13		263.13	392.74		392.74	231.81		231.81
Partners' capital, (net asset value) at Sep. 30, 2019		$ 4,118,910	$ 4,118,910	$ 44,031,939	$ 44,031,939		$ 426,519	$ 426,519		$ 135,456	$ 135,456		$ 16,540,494	$ 16,540,494		$ 521,283	$ 521,283	$ 479,174	$ 479,174
Partners' capital, (net asset value) (in units) at Sep. 30, 2019		4,113.63	4,113.63	54,461.43	54,461.43		510.60	510.60		166.90	166.90		19,719.24	19,719.24		637.03	637.03	702.40	702.40
Partners' capital, (net asset value) at Sep. 30, 2019																				67,294,193
Increase (Decrease) in Partners' Capital
Net asset value per unit at end of period (in dollars per unit)			$ 960.00		$ 777.20			$ 791.92			$ 770.52			$ 793.10			$ 774.74		$ 651.28
Partners' capital, (net asset value) at Mar. 31, 2019	$ 295,052								$ 202,748			$ 311,480			$ 179,588
Partners' capital, (net asset value) (in units) at Mar. 31, 2019	307.34								263.13			392.74			231.81
Partners' capital, (net asset value) at Mar. 31, 2019		$ 4,242,103		$ 48,883,913			$ 572,978			$ 128,596			$ 17,904,166			$ 549,387		$ 573,891
Partners' capital, (net asset value) (in units) at Mar. 31, 2019		4,418.85		62,897.34			723.53			166.90			22,575.04			709.12		881.18
Partners' capital, (net asset value) at Mar. 31, 2019																				73,843,902
Increase (Decrease) in Partners' Capital
Redemptions		$ (292,558)		$ (3,933,703)			$ (170,421)						$ (1,187,862)					$ (78,787)		(5,663,331)
Redemptions (in units)		(300.53)		(4,988.94)			(212.93)						(1,468.91)					(119.09)
Net income (loss)	$ 4,077	$ 58,670		$ 629,722			$ 9,650		$ 3,809	$ 2,417		$ 6,478	$ 370,988		$ 3,622	$ 11,081		$ 9,139		1,109,653
Partners' capital, (net asset value) at Jun. 30, 2019	$ 299,129								$ 206,557			$ 317,958			$ 183,210
Partners' capital, (net asset value) (in units) at Jun. 30, 2019	307.34								263.13			392.74			231.81
Partners' capital, (net asset value) at Jun. 30, 2019		$ 4,008,215		$ 45,579,932			$ 412,207			$ 131,013			$ 17,087,292			$ 560,468		$ 504,243
Partners' capital, (net asset value) (in units) at Jun. 30, 2019		4,118.32		57,908.40			510.60			166.90			21,106.13			709.12		762.09
Partners' capital, (net asset value) at Jun. 30, 2019																				69,290,224
Increase (Decrease) in Partners' Capital
Net asset value per unit at end of period (in dollars per unit)			$ 973.27		$ 787.10			$ 807.31			$ 785.00			$ 809.59			$ 790.36		$ 661.66
Redemptions		$ (4,669)		$ (2,794,853)									$ (1,160,585)			$ (59,242)		$ (40,716)		(4,060,065)
Redemptions (in units)		(4.69)		(3,446.97)									(1,386.89)			(72.09)		(59.69)
Net income (loss)	$ 8,610	$ 115,364		$ 1,246,860			$ 14,312		$ 7,005	$ 4,443		$ 11,473	$ 613,787		$ 6,476	$ 20,057		$ 15,647		2,064,034
Partners' capital, (net asset value) at Sep. 30, 2019	$ 307,739		$ 307,739						$ 213,562		$ 213,562	$ 329,431		$ 329,431	$ 189,686		$ 189,686
Partners' capital, (net asset value) (in units) at Sep. 30, 2019	307.34		307.34					0.00	263.13		263.13	392.74		392.74	231.81		231.81
Partners' capital, (net asset value) at Sep. 30, 2019		$ 4,118,910	$ 4,118,910	$ 44,031,939	$ 44,031,939		$ 426,519	$ 426,519		$ 135,456	$ 135,456		$ 16,540,494	$ 16,540,494		$ 521,283	$ 521,283	$ 479,174	$ 479,174
Partners' capital, (net asset value) (in units) at Sep. 30, 2019		4,113.63	4,113.63	54,461.43	54,461.43		510.60	510.60		166.90	166.90		19,719.24	19,719.24		637.03	637.03	702.40	702.40
Partners' capital, (net asset value) at Sep. 30, 2019																				$ 67,294,193
Increase (Decrease) in Partners' Capital
Net asset value per unit at end of period (in dollars per unit)			$ 1,001.28		$ 808.50			$ 835.34			$ 811.62			$ 838.80			$ 818.30		$ 682.19