Condensed Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Equity in net income attributable to AB Unitholders	$ 75,358	$ 97,407	$ 169,711	$ 186,314
Income taxes	7,217	6,490	15,642	14,310
Net income	$ 68,141	$ 90,917	$ 154,069	$ 172,004
Net income per unit:
Basic (in dollars per share)	$ 0.69	$ 0.91	$ 1.56	$ 1.72
Diluted (in dollars per share)	$ 0.69	$ 0.91	$ 1.56	$ 1.72