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Earnings Per Share
9 Months Ended
Sep. 30, 2019
Earnings Per Share [Abstract]  
Earnings Per Share 10. Earnings Per Share

The following table sets forth the computations of basic and diluted earnings per share:

Three months ended

Nine months ended

September 30,

September 30,

2019

2018

2019

2018

Net income

$

98,582

$

38,204

$

277,742

$

144,534

Shares:

Weighted-average number of common shares outstanding

27,775

27,802

27,730

27,844

Dilutive stock awards

613

215

538

123

Diluted weighted-average number of common shares outstanding

28,388

28,017

28,268

27,967

Basic earnings per share

$

3.55

$

1.37

$

10.02

$

5.19

Diluted earnings per share

$

3.47

$

1.36

$

9.83

$

5.17

 The following stock awards were excluded from the calculation of diluted earnings per share:

Three months ended

Nine months ended

September 30,

September 30,

2019

2018

2019

2018

Stock awards subject to performance conditions

84

108

83

103

Stock awards that were antidilutive

17

1,164

178

1,817

Total stock awards excluded from diluted earnings per share

101

1,272

261

1,920