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EARNINGS PER SHARE (Tables)
 12 Months Ended
Dec. 31, 2018
Earnings Per Share [Abstract]  
Summary of Basic and Diluted Earnings Per Share
(in thousands, except per share amounts)
2018
 
2017
 
2016
Basic
 
 
 
 
 
Net income
$
10,617

 
$
98,548

 
$
45,015

Weighted-average common shares outstanding
78,564

 
77,431

 
76,343

Earnings per share, basic
$
0.14

 
$
1.27

 
$
0.59

 
 
 
 
 
 
Diluted
 
 
 
 
 
Net income
$
10,617

 
$
98,548

 
$
45,015

Weighted-average effect of dilutive securities:
 
 
 
 
 
Stock options
2,891

 
3,471

 
2,025

RSUs
1,609

 
1,930

 
1,364

Effect of dilutive securities
4,500

 
5,401

 
3,389

Weighted-average common shares outstanding, assuming dilution
83,064

 
82,832

 
79,732

Earnings per share, diluted
$
0.13

 
$
1.19

 
$
0.56

 
 
 
 
 
 
Outstanding anti-dilutive stock options and RSUs (1)
188

 
221

 
322

(1) Certain outstanding stock options and RSUs were excluded from the computation of diluted earnings per share because they were anti-dilutive in the period presented. These awards may be dilutive in the future.