STATEMENTS OF CHANGES IN PARTNERS' CAPITAL (NET ASSET VALUE) (Parenthetical) - $ / shares	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
STATEMENTS OF CHANGES IN PARTNERS' CAPITAL (NET ASSET VALUE) [Abstract]
Net Asset Value per General and Limited Partner Unit (in dollars per unit)	$ 2,101.44	$ 2,381.04	$ 2,388.83	$ 2,799.71