Three Months Ended
June 30,

Six Months Ended
June 30,

2011

2010

2011

2010

Numerator for basic and diluted earnings per share:

Income from continuing operations

$

29,156

$

55,517

$

51,886

$

65,565

Income from discontinued operations

—

2,412

—

2,794

Net income

$

29,156

$

57,929

$

51,886

$

68,359

Denominator:

Basic shares outstanding

52,939

52,581

52,869

52,542

Dilutive effect of equity-based compensation awards

423

268

392

254

Dilutive shares outstanding

53,362

52,849

53,261

52,796

Basic earnings per share:

Income from continuing operations

$

0.55

$

1.05

$

0.98

$

1.25

Income from discontinued operations, net of tax

—

0.05

—

0.05

Net income

$

0.55

$

1.10

$

0.98

$

1.30

Diluted earnings per share:

Income from continuing operations

$

0.55

$

1.05

$

0.97

$

1.24

Income from discontinued operations, net of tax

—

0.05

—

0.05

Net income

$

0.55

$

1.10

$

0.97

$

1.29