Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues:
Dividend and interest income	$ 8,794	$ 9,070	$ 26,136	$ 42,227
Investment (losses) gains	(2,724)	1,106	3,385	(19,011)
Other revenues	26,973	26,583	80,584	78,186
Total revenues	1,093,792	901,505	3,179,758	2,659,864
Less: Interest expense	960	1,467	2,838	14,221
Net revenues	1,092,832	900,038	3,176,920	2,645,643
Expenses:
Employee compensation and benefits	433,928	357,821	1,275,694	1,069,731
Promotion and servicing:
Amortization of deferred sales commissions	8,731	7,434	24,866	19,582
Trade execution, marketing, T&E and other	47,428	41,220	140,677	141,118
General and administrative:
General and administrative	132,064	119,318	383,611	363,009
Real estate charges	0	0	0	5,526
Contingent payment arrangements	838	813	2,472	2,413
Interest on borrowings	1,280	1,073	3,815	5,003
Amortization of intangible assets	1,502	6,833	4,502	20,042
Total expenses	813,182	682,892	2,353,063	2,040,627
Operating income	279,650	217,146	823,857	605,016
Income taxes	16,029	9,089	45,254	29,949
Net income	263,621	208,057	778,603	575,067
Net (loss) income of consolidated entities attributable to non-controlling interests	(1,074)	81	2,207	(4,550)
Net income attributable to AB Unitholders	$ 264,695	$ 207,976	$ 776,396	$ 579,617
Net income per AB Unit:
Basic (in dollars per unit)	$ 0.96	$ 0.77	$ 2.82	$ 2.13
Diluted (in dollars per unit)	$ 0.96	$ 0.77	$ 2.82	$ 2.13
Investment advisory and services fees
Revenues:
Revenue subject to contracts with customers	$ 776,797	$ 630,539	$ 2,257,887	$ 1,830,467
Bernstein research services
Revenues:
Revenue subject to contracts with customers	113,340	98,514	338,016	341,346
Distribution related
Revenues:
Revenue subject to contracts with customers	170,612	135,693	473,750	386,649
Promotion and servicing:
Distribution-related payments	$ 187,411	$ 148,380	$ 517,426	$ 414,203