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Earnings per Share
 3 Months Ended
Dec. 31, 2017
Earnings Per Share [Abstract]  
Earnings per Share

12. Earnings per Share

The calculations of basic and diluted net income per share and basic and diluted weighted average shares outstanding are as follows for the three months ended December 31, 2017 and 2016 (in thousands, except per share data):

 

 

 

 

 

 

 

 

 

 

Three Months Ended

 

 

 

December 31, 

 

 

    

2017

    

2016

 

Net income

 

$

16,486

 

$

13,871

 

 

 

 

 

 

 

 

 

Weighted average common shares outstanding used in computing basic earnings per share

 

 

70,183

 

 

69,181

 

Dilutive common stock options and restricted stock units

 

 

681

 

 

689

 

Weighted average common shares outstanding used in computing diluted earnings per share

 

 

70,864

 

 

69,870

 

 

 

 

 

 

 

 

 

Basic net income per share

 

$

0.23

 

$
0.20

 

Diluted net income per share

 

$

0.23

 

$
0.20

 

 

During the three months ended December 31, 2017, 190,000 antidilutive restricted stock units were excluded from the computation of diluted earnings per share based on the treasury stock method. There were no such awards during the three months ended December 31, 2016.