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Net Income Per Common Share
 3 Months Ended
Mar. 31, 2015
Earnings Per Share [Abstract]  
Net Income Per Common Share
Net Income Per Common Share
 
Basic net income per common share is computed by dividing net income by the weighted average number of common shares outstanding during the period. Weighted average common shares outstanding for the basic net income per common share calculation includes vested restricted stock units (RSUs) granted to nonemployee directors as there are no conditions under which those shares will not be issued. Diluted net income per common share is computed by dividing net income by the combination of other potentially dilutive weighted average common shares and the weighted average number of common shares outstanding during the period. Other potentially dilutive weighted average common shares include the dilutive effect of stock options, RSUs, and performance stock units (PSUs) for each period using the treasury stock method. Under the treasury stock method, the exercise price of a share, the amount of compensation expense, if any, for future service that has not yet been recognized, and the amount of tax benefits that would be recorded in additional paid-in capital, if any, when the share is exercised are assumed to be used to repurchase shares in the current period.

The following table sets forth the computation of basic and diluted net income per common share:

 
Three Months Ended
March 31
 
2015
 
2014
 
(thousands, except per-share data)
Net income
$
7,617

 
$
5,565

Weighted average common shares outstanding during the period (for basic calculation)
39,498

 
39,372

Dilutive effect of other potential common shares
124

 
80

Weighted average common shares and potential common shares (for diluted calculation)
39,622

 
39,452

 
 
 
 
Net income per common share - Basic
$
0.19

 
$
0.14

Net income per common share - Diluted
$
0.19

 
$
0.14



The computation of the dilutive effect of other potential common shares excludes stock awards representing 0.1 million shares and 0.2 million shares of common stock, respectively, in the three months ended March 31, 2015 and 2014. Under the treasury stock method, the inclusion of these stock awards would have been antidilutive.