EARNINGS PER SHARE (Tables)

12 Months Ended

Dec. 31, 2018

Earnings per share calculation [Table Text Block]

A summary of the earnings per share calculation is as follows:



	Year Ended December 31,
(in thousands, except per share amounts)	2018		2017		2016
Basic earnings per share:
Net income	$	69,984	$	27,609	$	48,898
Weighted-average common shares	29,456		29,674		28,925
Basic earnings per share	$	2.38	$	0.93	$	1.69
Diluted earnings per share ⁽¹⁾:
Net income	$	69,984	$	27,609	$	48,898
Weighted-average common shares	29,456		29,674		28,925
Effect of dilutive securities:
Employee stock plans	691		871		694
Diluted weighted-average common shares	30,147		30,545		29,619
Diluted earnings per share	$	2.32	$	0.90	$	1.65

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(1)

The Company includes the shares underlying performance-based awards in the calculation of diluted earnings per share if the performance conditions have been satisfied as of the end of the reporting period and excludes such shares when the necessary conditions have not been met. The Company has included in the 2018, 2017 and 2016 calculations those shares that were contingently issuable upon the satisfaction of the performance conditions as of the end of the respective periods.