Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

EPS Calculation [Table Text Block]

	Three Months Ended September 30,						Nine Months Ended September 30,
In thousands, except per share data	2016			2015			2016		2015
Net income (loss)	$	(8,040	)	$	(6,685	)	$	30,620	$	23,998
Average common shares outstanding - basic	27,554			27,363			27,504		27,336
Additional shares for stock-based compensation plans (See Note 5)	—			—			125		63
Average common shares outstanding - diluted	27,554			27,363			27,629		27,399
Earnings (loss) per share of common stock - basic	$	(0.29	)	$	(0.24	)	$	1.11	$	0.88
Earnings (loss) per share of common stock - diluted	$	(0.29	)	$	(0.24	)	$	1.11	$	0.88
Additional information:
Antidilutive shares	159			91			5		19