13.  NET INCOME PER SHARE

Basic net income per share is calculated by dividing net income by the weighted average shares outstanding during the period, without consideration for common stock equivalents. Diluted net income per share is calculated by adjusting weighted average shares outstanding for the dilutive effect of common stock equivalents outstanding for the period, determined using the treasury stock method.

Basic and diluted net income per share were computed as follows:

Years Ended December 31,

2025

2024

2023

Net income (in thousands)

$

521,727

$

622,602

$

614,254

Weighted average number of common shares outstanding - basic

28,333,633

30,504,064

31,597,508

Dilutive effect of common stock equivalents:

RSAs with service-based conditions

23,767

36,609

30,368

RSAs with market-based conditions

66,165

21,020

37,519

RSAs with performance-based conditions

42,286

27,298

25,645

Stock options

75,412

90,669

85,861

Weighted average number of common shares outstanding - diluted

28,541,263

30,679,660

31,776,901

Basic net income per common share

$

18.41

$

20.41

$

19.44

Diluted net income per common share

$

18.28

$

20.29

$

19.33

The following table summarizes shares excluded from the calculation of diluted net income per share because their effect would have been anti-dilutive:

Year Ended December 31, 

2025

2024

2023

Anti-dilutive common stock equivalents:

RSAs with service-based conditions

1,807

-

-

RSAs with market-based conditions

24

3,271

3,876

RSAs with performance-based conditions

-

-

-

Stock options

-

-

504

Total anti-dilutive common stock equivalents

1,831

3,271

4,380

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.