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Summary of Significant Accounting Policies (Tables)
 3 Months Ended
Mar. 31, 2017
Accounting Policies [Abstract]  
Components of basic and diluted weighted-average shares
The following table presents information about basic and diluted weighted-average shares outstanding:
 
 
Three Months Ended 
 March 31,
(in thousands)
 
2017
 
2016
 
 
 
 
 
Numerator (for basic and diluted earnings per share)
 
 
 
 
Net (loss) income
 
$
(1,939
)
 
$
4,888

Less income allocated to RSUs
 
—


(53
)
Numerator for basic and diluted earnings per share
 
$
(1,939
)
 
$
4,835

Denominator
 
 
 
 
Basic weighted-average shares outstanding
 
82,079


83,965

Effect of dilutive securities:
 



Stock options held by employees and directors
 
—


260

Diluted weighted-average shares outstanding
 
82,079

 
84,225

Anti-dilutive securities (1)
 
1,397

 
—

(1) Amount outstanding at balance sheet date, before application of the treasury stock method and not weighted for period outstanding.