Net Income (Loss) Per Share (Tables)

3 Months Ended

Mar. 31, 2017

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

	Three months ended March 31,
In thousands except per share amounts	2017		2016
Net income (loss) available to common stockholders	$	18,663	$	(20,396	)
Weighted average shares:
Basic	178,898		150,249
Effect of stock-based compensation plans	4,170		—
Diluted	183,068		150,249
Income (loss) per share:
Basic	$	0.10	$	(0.14	)
Diluted	$	0.10	$	(0.14	)