Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues:
Revenue subject to contracts with customers	$ 837,395	$ 834,761	$ 1,744,715	$ 1,603,947
Dividend and interest income	12,692	27,654	33,157	55,000
Investment gains (losses)	24,189	10,949	(20,117)	26,684
Other revenues	26,092	24,796	51,603	47,002
Total revenues	874,884	874,101	1,758,359	1,686,726
Less: Interest expense	3,435	16,302	12,754	33,465
Net revenues	871,449	857,799	1,745,605	1,653,261
Expenses:
Employee compensation and benefits	349,638	363,702	711,910	703,011
Promotion and servicing:
Amortization of deferred sales commissions	6,622	3,241	12,148	6,743
Trade execution, marketing, T&E and other	44,288	57,550	99,898	107,198
General and administrative:
General and administrative	121,424	120,180	243,691	238,028
Real estate charges	5,526	548	5,526	548
Contingent payment arrangements	807	829	1,600	883
Interest on borrowings	1,096	3,990	3,930	7,973
Amortization of intangible assets	6,723	7,285	13,209	14,259
Total expenses	661,802	673,579	1,357,735	1,300,890
Operating income	209,647	184,220	387,870	352,371
Income taxes	11,386	10,211	20,860	19,132
Net income	198,261	174,009	367,010	333,239
Net income (loss) of consolidated entities attributable to non-controlling interests	20,940	7,757	(4,631)	17,873
Net income attributable to AB Unitholders	$ 177,321	$ 166,252	$ 371,641	$ 315,366
Net income per AB Unit:
Basic (in dollars per unit)	$ 0.65	$ 0.61	$ 1.36	$ 1.17
Diluted (in dollars per unit)	$ 0.65	$ 0.61	$ 1.36	$ 1.17
Investment advisory and services fees
Revenues:
Revenue subject to contracts with customers	$ 578,203	$ 596,364	$ 1,199,928	$ 1,152,958
Bernstein research services
Revenues:
Revenue subject to contracts with customers	113,609	105,991	242,832	196,226
Distribution related
Revenues:
Revenue subject to contracts with customers	120,099	108,347	250,956	208,856
Promotion and servicing:
Distribution-related payments	$ 125,678	$ 116,254	$ 265,823	$ 222,247