Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

Details of Basic and Diluted Earnings (Loss) Per Share (EPS)

The following table sets forth the details of basic and diluted earnings (loss) per share (EPS):

	Year ended December 31
In thousands, except per share		2019		2018			2017
Net income (loss)	$	(21,541	)	$	(177,604	)	$	7,914
Weighted average common shares    outstanding used in basic EPS		44,132			43,768			43,609
Common shares issuable upon    exercise of dilutive stock options    and PSAs / RSUs		—			—		830
Weighted average common shares    outstanding and common share    equivalents used in diluted EPS		44,132			43,768			44,439
Income (loss) per share
Continuing operations	$	(0.57	)	$	(0.01	)	$	(0.13	)
Discontinued operations		0.08			(4.05	)		0.30

Number of Potential Common Shares that have been Excluded from Computation of Diluted Earnings Per Share for Indicated Period Due to Their Anti-Dilutive Nature

The following table sets forth the potential common shares outstanding for stock options that were not included in the computation of diluted EPS for the period indicated, because their effect would be anti-dilutive:

	Year ended December 31
In thousands	2019		2018		2017
Potential common shares		1,233		1,379		610