Net Income per Unit

3 Months Ended

Mar. 31, 2013

Net Income per Unit [Abstract]

Net Income per Unit

4. Net Income per Unit

Basic net income per unit is derived by dividing net income by the basic weighted average number of units outstanding for each period. Diluted net income per unit is derived by adjusting net income for the assumed dilutive effect of compensatory options ("Net income – diluted") and dividing by the diluted weighted average number of units outstanding for each period.

	Three Months Ended March 31,
	2013		2012
	(in thousands, except per unit amounts)
Net income – basic	$	38,231	$	26,699
Additional allocation of equity in net income attributable to AllianceBernstein resulting from assumed dilutive effect of compensatory options		243		—
Net income – diluted	$	38,474	$	26,699
Weighted average units outstanding – basic		100,297		101,767
Dilutive effect of compensatory options		937		—
Weighted average units outstanding – diluted		101,234		101,767
Basic net income per unit	$	0.38	$	0.26
Diluted net income per unit	$	0.38	$	0.26

As of March 31, 2013 and 2012, we excluded 3,161,304 and 8,977,349 options, respectively, from the diluted net income per unit computation due to their anti-dilutive effect. Weighted average units outstanding do not include Holding's proportional share (37.5% during the first quarters of 2013 and 2012) of the Holding Units held by AllianceBernstein in its consolidated rabbi trust.