Numerator:

Net income

$

3,754

$

13,598

$

21,289

$

57,974

Denominator:

Basic earnings per common share - weighted-average shares

81,437

81,306

81,389

81,260

Effect of dilutive stock options

55

148

71

154

Diluted earnings per common share - weighted-average shares and assumed conversions

81,492

81,454

81,460

81,414

Basic earnings per common share

$

0.05

$

0.17

$

0.26

$

0.71

Diluted earnings per common share

$

0.05

$

0.17

$

0.26

$

0.71