Condensed Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Equity in net income attributable to AB Unitholders	$ 65,761	$ 63,905	$ 211,264	$ 233,616
Income taxes	8,770	7,589	26,278	23,231
Net income	$ 56,991	$ 56,316	$ 184,986	$ 210,385
Net income per unit:
Basic (in dollars per share)	$ 0.50	$ 0.56	$ 1.63	$ 2.11
Diluted (in dollars per share)	$ 0.50	$ 0.56	$ 1.63	$ 2.11