Income Taxes (Tables)

9 Months Ended

Sep. 30, 2020

Income Tax Disclosure [Abstract]

Computation of Effective Income Tax Rate and Changes in Components of Income Tax

	Three Months Ended September 30,								Nine Months Ended September 30,
	2020			2019			% Change		2020			2019			% Change
									(in thousands)
Net income attributable to AB Unitholders	$	207,976		$	187,811		10.7	%	$	579,617		$	503,177		15.2	%
Multiplied by: weighted average equity ownership interest	35.5		%	35.5		%			35.7		%	35.5		%
Equity in net income attributable to AB Unitholders	$	73,874		$	66,722		10.7		$	206,989		$	178,383		16.0
AB qualifying revenues	$	642,303		$	656,173		(2.1)		$	1,931,252		$	1,886,176		2.4
Multiplied by: weighted average equity ownership interest for calculating tax	30.0		%	29.4		%			30.2		%	29.5		%
Multiplied by: federal tax	3.5		%	3.5		%			3.5		%	3.5		%
Federal income taxes	6,738			6,759					20,432			19,459
State income taxes	137			135					373			383
Total income taxes	$	6,875		$	6,894		(0.3)		$	20,805		$	19,842		4.9
Effective tax rate	9.3		%	10.3		%			10.1		%	11.1		%