Net Income Per Share

9 Months Ended

Sep. 30, 2021

Basic net income per share is calculated as net income available to common shareholders divided by the weighted average number of shares outstanding.

Diluted net income per share is calculated as net income available to common shareholders divided by the weighted average number of shares outstanding plus the incremental number of shares added as a result of converting common stock equivalents, calculated using the treasury stock method. The Corporation’s common stock equivalents consist of outstanding stock options, restricted stock, RSUs, and PSUs. PSUs are required to be included in weighted average diluted shares outstanding if performance measures, as defined in each PSU award agreement, are met as of the end of the period.

A reconciliation of weighted average shares outstanding used to calculate basic and diluted net income per share follows (in thousands, except per share data):


	Three months ended September 30				Nine months ended September 30
	2021		2020		2021		2020
Weighted average shares outstanding (basic)	162,506		162,061		162,577		162,416
Impact of common stock equivalents	950		518		1,057		667
Weighted average shares outstanding (diluted)	163,456		162,579		163,634		163,083
Per share:
Basic	$	0.45	$	0.38	$	1.27	$	0.78
Diluted	0.45		0.38		1.26		0.78