Investment in the Funds - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
CMF Aspect Master Fund L.P. [Member]
Investment [Line Items]
Percentage owned by partnership		44.90%
CMF Willowbridge Master Fund L.P. [Member]
Investment [Line Items]
Percentage owned by partnership		8.10%
CMF Graham Capital Master Fund L.P. [Member]
Investment [Line Items]
Percentage owned by partnership		65.70%
CMF Boronia I LLC [Member]
Investment [Line Items]
Percentage owned by partnership		35.00%
Cambridge Master Fund L.P. [Member]
Investment [Line Items]
Percentage owned by partnership	100.00%	65.90%
Mesirow [Member]
Investment [Line Items]
Maximum amount of partnership assets allocated to trading advisor	2.0
SECOR Alpha Master Fund L.P. [Member]
Investment [Line Items]
Maximum amount of partnership assets allocated to trading advisor	1.5 times
Percentage owned by partnership	84.70%
CMF FORT Contrarian Master Fund LLC [Member]
Investment [Line Items]
Maximum amount of partnership assets allocated to trading advisor	1.25 times
Percentage of investment in trading companies	49.00%
Percentage owned by partnership	11.50%
CMF AE Capital Master Fund LLC [Member]
Investment [Line Items]
Percentage owned by partnership	79.20%