Consolidated Statements of Financial Condition (Parenthetical) - $ / shares	Sep. 30, 2021	Dec. 31, 2020
Class 0 Units [Member]
Members' capital:
Capital units, issued (in units)	101,946.956	102,935.438
Capital units, outstanding (in units)	101,946.956	102,935.438
Capital units, value (in dollars per unit)	$ 179.58	$ 173.06
Class 2 Units [Member]
Members' capital:
Capital units, issued (in units)	82,066.621	89,986.690
Capital units, outstanding (in units)	82,066.621	89,986.690
Capital units, value (in dollars per unit)	$ 128.28	$ 124.23