Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues:
Dividend and interest income	$ 38,734	$ 50,923	$ 104,421
Investment (losses) gains	(636)	(16,401)	38,659
Other revenues	108,409	104,703	97,559
Total revenues	4,445,288	3,724,186	3,575,637
Less: Interest expense	3,686	15,650	57,205
Net revenues	4,441,602	3,708,536	3,518,432
Expenses:
Employee compensation and benefits	1,716,013	1,494,198	1,442,783
Promotion and servicing:
Amortization of deferred sales commissions	34,364	27,355	15,029
Trade execution, marketing, T&E and other	197,486	189,787	219,860
General and administrative:
General and administrative	555,608	485,544	484,750
Real estate charges	0	5,526	3,324
Contingent payment arrangements	2,710	1,855	(510)
Interest on borrowings	5,145	6,180	13,035
Amortization of intangible assets	5,697	21,372	28,759
Total expenses	3,225,140	2,801,100	2,694,995
Operating income	1,216,462	907,436	823,437
Income tax	62,728	45,653	41,754
Net income	1,153,734	861,783	781,683
Net income (loss) of consolidated entities attributable to non-controlling interests	5,111	(4,169)	29,641
Net income attributable to AB Unitholders	$ 1,148,623	$ 865,952	$ 752,042
Net income per AB Unit:
Basic (in dollars per share)	$ 4.18	$ 3.19	$ 2.78
Diluted (in dollars per share)	$ 4.18	$ 3.19	$ 2.78
Investment advisory and services fees
Revenues:
Revenue subject to contracts with customers	$ 3,194,524	$ 2,595,436	$ 2,472,044
Bernstein research services
Revenues:
Revenue subject to contracts with customers	452,017	459,744	407,911
Distribution related
Revenues:
Revenue subject to contracts with customers	652,240	529,781	455,043
Promotion and servicing:
Distribution-related payments	$ 708,117	$ 569,283	$ 487,965