Consolidated Statements of Financial Condition (Unaudited) (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Class 0 Units [Member]
Members' capital:
Capital units, issued (in units)	431,892.793	456,544.588
Capital units, outstanding (in units)	431,892.793	456,544.588
Capital units, value (in dollars per unit)	$ 114.03	$ 127.72
Class 2 Units [Member]
Members' capital:
Capital units, issued (in units)	189,711.755	186,461.512
Capital units, outstanding (in units)	189,711.755	186,461.512
Capital units, value (in dollars per unit)	$ 87.43	$ 98.41