Condensed Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Equity in net income attributable to AB Unitholders	$ 94,353	$ 88,907
Income taxes	8,425	7,820
Net income	$ 85,928	$ 81,087
Net income per unit:
Basic (in dollars per share)	$ 0.87	$ 0.81
Diluted (in dollars per share)	$ 0.87	$ 0.81