Investment in the Funds - Assets, Liabilities and Partners' Members' Capital of Funds (Detail) - USD ($)	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Investment Holdings [Line Items]
Total Assets	$ 623,296,907	$ 818,584,324
Total Liabilities	17,238,432	20,051,397
Total Capital	606,058,475	798,532,927	$ 997,913,751	$ 1,090,699,381
CMF Winton Master L.P. [Member]
Investment Holdings [Line Items]
Total Assets	352,978,637	408,725,040
Total Liabilities	13,779,023	11,076,733
Total Capital	339,199,614	397,648,307
CMF TT II, LLC [Member]
Investment Holdings [Line Items]
Total Assets	150,331,839	217,045,353
Total Liabilities	533,135	15,335,906
Total Capital	149,798,704	201,709,447
CMF Willowbridge Master Fund L.P.[Member]
Investment Holdings [Line Items]
Total Assets	192,211,165	336,101,673
Total Liabilities	43,829,178	39,096,772
Total Capital	148,381,987	$ 297,004,901
CMF FORT Contrarian Master Fund LLC [Member]
Investment Holdings [Line Items]
Total Assets	180,042,210
Total Liabilities	1,648,773
Total Capital	$ 178,393,437