EARNINGS PER SHARE (Tables)

12 Months Ended

Dec. 31, 2017

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)	2017		2016		2015
Basic earnings per share:
Net income	$	27,609	$	48,898	$	39,152
Weighted-average common shares	29,674		28,925		29,001
Basic earnings per share	$	0.93	$	1.69	$	1.35
Diluted earnings per share ⁽¹⁾:
Net income	$	27,609	$	48,898	$	39,152
Weighted-average common shares	29,674		28,925		29,001
Effect of dilutive securities:
Employee stock plans	871		694		695
Diluted weighted-average common shares	30,545		29,619		29,696
Diluted earnings per share	$	0.90	$	1.65	$	1.32

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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 2017, 2016 and 2015 calculations those shares that were contingently issuable upon the satisfaction of the performance conditions as of the end of the respective periods.