Investment in the Funds - Additional Information (Detail) - TradingVehicle			12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018
Minimum [Member] | General Partner [Member]
Investment [Line Items]
Percentage of expenses to net assets to be covered by General Partner			0.85%
Mesirow Financial International UK Limited [Member] | Maximum [Member]
Investment [Line Items]
Leverage applied to assets			150.00%
CMF AE Capital Master Fund LLC [Member]
Investment [Line Items]
Number of trading vehicles			1
Percentage owned by partnership	7.60%
Cambridge Master Fund L.P. [Member]
Investment [Line Items]
Percentage owned by partnership		22.90%