Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Income Tax Disclosure [Abstract]

Difference Between AB Holding's Effective Tax Rates and the UBT Statutory Tax Rate

The principal reasons for the difference between AB Holding’s effective tax rates and the UBT statutory tax rate of 4.0% are as follows:

	Years Ended December 31,
	2018					2017					2016
	(in thousands)
UBT statutory rate	$	10,826		4.0	%	$	9,296		4.0	%	$	9,576		4.0	%
Federal tax on partnership gross business income	27,674			10.2		24,520			10.5		22,342			9.3
State income taxes	576			0.2		451			0.2		461			0.2
Credit for UBT paid by AB	(10,826		)	(4.0	)	(9,296		)	(4.0	)	(9,576		)	(4.0	)
Income tax expense and effective tax rate	$	28,250		10.4		$	24,971		10.7		$	22,803		9.5

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

AB Holding Units in AB’s consolidated rabbi trust are not considered outstanding for purposes of calculating AB Holding’s ownership interest in AB.

	Years Ended December 31,									% Change
	2018			2017			2016			2018-17		2017-16
	(in thousands)
Net income attributable to AB Unitholders	$	757,588		$	662,403		$	673,358		14.4	%	(1.6	)%
Multiplied by: weighted average equity ownership interest	35.7		%	35.1		%	35.6		%
Equity in net income attributable to AB Unitholders	$	270,647		$	232,393		$	239,389		16.5		(2.9	)
AB qualifying revenues	$	2,647,254		$	2,407,212		$	2,143,858		10.0		12.3
Multiplied by: weighted average equity ownership interest for calculating tax	29.9		%	29.1		%	29.8		%
Multiplied by: federal tax	3.5		%	3.5		%	3.5		%
Federal income taxes	27,674			24,520			22,342
State income taxes	576			451			461
Total income taxes	$	28,250		$	24,971		$	22,803		13.1		9.5