NET INCOME PER SHARE
 
The Company computes basic net income per share by dividing net income applicable to common stockholders by the weighted-average number of common shares outstanding during the period. Diluted net income per share is based upon the weighted-average number of common and common equivalent shares outstanding during the period. Only dilutive common equivalent shares that decrease the net income per share are included in the computation of diluted net income per share.
 
Common equivalent shares related to stock options, restricted stock units, and performance share units are calculated using the treasury stock method. Performance share units are included in the weighted-average common equivalent shares based on the number of shares that would be issued if the end of the reporting period were the end of the performance period, if the result would be dilutive. See Note 12 for information on the convertible senior notes that matured in May 2025. For periods prior to the date of the Company's irrevocable election to settle the conversion premium in cash, the Company used the if-converted method to calculate the dilutive effect of the convertible senior notes.
A reconciliation of the weighted-average number of shares outstanding used in calculating diluted net income per share is as follows: 
 Year Ended December 31,
(In thousands)202520242023
Weighted-average number of basic common shares outstanding32,452 33,622 36,140 
Weighted-average dilutive stock options, restricted stock units, and performance share units
187 242 228 
Assumed conversion of convertible senior notes— 200 162 
Weighted-average number of diluted common and common equivalent shares outstanding32,639 34,064 36,530 

About Earnings Per Share Disclosures

The earnings per share disclosure breaks down the calculation from net income to both basic and diluted EPS, revealing the full impact of a company's capital structure on per-share economics. The reconciliation between basic and diluted share counts exposes how many stock options, RSUs, convertible securities, and warrants are potentially dilutive to existing shareholders.

Key signals: a widening gap between basic and diluted shares indicates growing dilution from equity compensation or convertible instruments. Anti-dilutive securities excluded from the diluted calculation deserve attention — they represent latent dilution that will materialize if the stock price rises. Watch for the effect of share buybacks on per-share metrics: EPS growth driven primarily by repurchases rather than income growth signals weakening fundamentals. Compare year-over-year changes in the diluted share count against equity compensation expense to assess whether management is effectively managing dilution.