Three Months Ended
June 30,

Six Months Ended
June 30,

2023

2022

2023

2022

(Amounts in thousands, except per share data)

Numerator:

Net income

$

20,064

$

49,861

$

48,893

$

96,825

Effect of dilutive securities:

Charges associated with convertible debt instruments, net of tax

—

—

—

387

Numerator for diluted earnings per share - net income available to common stockholders after the effect of dilutive securities

$

20,064

$

49,861

$

48,893

$

97,212

Denominator:

Weighted average shares used in computing net income per share - basic

55,705

55,444

55,648

55,399

Effect of dilutive shares:

Options and stock units

451

598

487

661

Convertible Senior Notes

701

676

797

1,779

Dilutive effect of unvested performance stock units

1

3

1

3

Dilutive potential common shares

1,153

1,277

1,284

2,443

Denominator for diluted earnings per share - adjusted weighted average shares used in computing net income per share - diluted

56,858

56,721

56,932

57,842

Earnings per share:

Basic

$

0.36

$

0.90

$

0.88

$

1.75

Diluted

$

0.35

$

0.88

$

0.86

$

1.68