Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2017

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

Diluted earnings per share are calculated as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
In thousands, except per share data	2017		2016		2017		2016
Net income	$	2,729	$	2,019	$	43,039	$	38,660
Average common shares outstanding - basic	28,648		27,510		28,641		27,479
Additional shares for stock-based compensation plans (See Note 5)	69		122		81		112
Average common shares outstanding - diluted	28,717		27,632		28,722		27,591
Earnings per share of common stock - basic	$	0.10	$	0.07	$	1.50	$	1.41
Earnings per share of common stock - diluted	$	0.10	$	0.07	$	1.50	$	1.40
Additional information:
Antidilutive shares	32		23		21		16