Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues:
Investment advisory and services fees	$ 573,598	$ 498,290
Bernstein research services	114,400	112,741
Distribution revenues	108,004	96,554
Dividend and interest income	28,215	14,056
Investment gains (losses)	26,082	25,201
Other revenues	27,028	22,365
Total revenues	877,327	769,207
Less: Interest expense	9,540	4,290
Net revenues	867,787	764,917
Expenses:
Employee compensation and benefits	343,825	321,748
Promotion and servicing:
Distribution-related payments	110,154	94,213
Amortization of deferred sales commissions	6,598	9,079
Trade execution, marketing, T&E and other	54,043	50,368
General and administrative:
General and administrative	121,234	114,221
Real estate credits	(264)	(2)
Contingent payment arrangements	53	177
Interest on borrowings	2,612	1,868
Amortization of intangible assets	6,861	6,933
Total expenses	645,116	598,605
Operating income	222,671	166,312
Income taxes	15,825	10,057
Net income	206,846	156,255
Net income of consolidated entities attributable to non-controlling interests	22,650	16,318
Net income attributable to AB Unitholders	$ 184,196	$ 139,937
Net income per AB Unit:
Basic (in dollars per unit)	$ 0.68	$ 0.52
Diluted (in dollars per unit)	$ 0.68	$ 0.51