Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues:
Revenue subject to contracts with customers	$ 890,976	$ 861,148	$ 2,635,691	$ 2,465,095
Dividend and interest income	9,070	24,882	42,227	79,882
Investment gains (losses)	1,106	4,433	(19,011)	31,117
Other revenues	26,583	24,497	78,186	71,499
Total revenues	901,505	890,845	2,659,864	2,577,571
Less: Interest expense	1,467	12,978	14,221	46,443
Net revenues	900,038	877,867	2,645,643	2,531,128
Expenses:
Employee compensation and benefits	357,821	361,822	1,069,731	1,064,833
Promotion and servicing:
Amortization of deferred sales commissions	7,434	3,605	19,582	10,348
Trade execution, marketing, T&E and other	41,220	53,814	141,118	161,012
General and administrative:
General and administrative	119,318	117,056	363,009	355,084
Real estate charges	0	153	5,526	701
Contingent payment arrangements	813	829	2,413	1,712
Interest on borrowings	1,073	2,802	5,003	10,775
Amortization of intangible assets	6,833	7,277	20,042	21,536
Total expenses	682,892	675,084	2,040,627	1,975,974
Operating income	217,146	202,783	605,016	555,154
Income taxes	9,089	10,827	29,949	29,959
Net income	208,057	191,956	575,067	525,195
Net income (loss) of consolidated entities attributable to non-controlling interests	81	4,145	(4,550)	22,018
Net income attributable to AB Unitholders	$ 207,976	$ 187,811	$ 579,617	$ 503,177
Net income per AB Unit:
Basic (in dollars per unit)	$ 0.77	$ 0.69	$ 2.13	$ 1.86
Diluted (in dollars per unit)	$ 0.77	$ 0.69	$ 2.13	$ 1.86
Investment advisory and services fees
Revenues:
Revenue subject to contracts with customers	$ 630,539	$ 616,384	$ 1,830,467	$ 1,769,342
Bernstein research services
Revenues:
Revenue subject to contracts with customers	98,514	102,014	341,346	298,240
Distribution related
Revenues:
Revenue subject to contracts with customers	135,693	118,635	386,649	327,491
Promotion and servicing:
Distribution-related payments	$ 148,380	$ 127,726	$ 414,203	$ 349,973