Earnings per share consisted of the following components for the years ended December 31:
202020192018
 (Dollars in thousands, except per share data)
Net income$121,167 $165,175 $121,622 
Weighted Average Shares
Basic shares33,259,643 32,810,433 27,592,380 
Effect of dilutive securities25,646 45,801 61,428 
Diluted shares33,285,289 32,856,234 27,653,808 
Net income per share
Basic EPS$3.64 $5.03 $4.41 
Effect of dilutive securities— — (0.01)
Diluted EPS$3.64 $5.03 $4.40 
For the year ended December 31, 2020, there were 632 options to purchase common stock and 476 shares of performance-based restricted stock that were excluded from the calculation of diluted earnings per share because they were anti-dilutive. For the years ended December 31, 2019 and 2018, there were no options to purchase common stock and no shares of performance-based restricted stock that were considered anti-dilutive.

Historical Timeline

Fiscal YearFiled
2020Feb 26, 2021Showing above
2019Feb 27, 2020
2018Feb 28, 2019
2017Feb 27, 2018
2016Feb 28, 2017
2015Feb 25, 2016

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.