Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues:
Revenue subject to contracts with customers	$ 834,761	$ 834,203	$ 1,603,947	$ 1,656,006
Dividend and interest income	27,654	21,194	55,000	49,409
Investment gains (losses)	10,949	213	26,684	26,295
Other revenues	24,796	26,026	47,002	52,536
Total revenues	874,101	856,870	1,686,726	1,734,197
Less: Interest expense	16,302	12,132	33,465	21,672
Net revenues	857,799	844,738	1,653,261	1,712,525
Expenses:
Employee compensation and benefits	363,702	358,248	703,011	702,073
Promotion and servicing:
Amortization of deferred sales commissions	3,241	6,113	6,743	12,711
Trade execution, marketing, T&E and other	57,550	59,259	107,198	113,302
General and administrative:
General and administrative	120,180	108,836	238,028	230,070
Real estate charges	548	6,909	548	6,645
Contingent payment arrangements	829	52	883	105
Interest on borrowings	3,990	2,629	7,973	5,241
Amortization of intangible assets	7,285	6,927	14,259	13,788
Total expenses	673,579	655,274	1,300,890	1,300,390
Operating income	184,220	189,464	352,371	412,135
Income taxes	10,211	7,538	19,132	23,363
Net income	174,009	181,926	333,239	388,772
Net income of consolidated entities attributable to non-controlling interests	7,757	261	17,873	22,911
Net income attributable to AB Unitholders	$ 166,252	$ 181,665	$ 315,366	$ 365,861
Net income per AB Unit:
Basic (in dollars per unit)	$ 0.61	$ 0.66	$ 1.17	$ 1.34
Diluted (in dollars per unit)	$ 0.61	$ 0.66	$ 1.17	$ 1.34
Investment advisory and services fees
Revenues:
Revenue subject to contracts with customers	$ 596,364	$ 598,108	$ 1,152,958	$ 1,172,224
Bernstein research services
Revenues:
Revenue subject to contracts with customers	105,991	106,211	196,226	220,611
Distribution related
Revenues:
Revenue subject to contracts with customers	108,347	105,118	208,856	213,122
Promotion and servicing:
Distribution-related payments	$ 116,254	$ 106,301	$ 222,247	$ 216,455