Net Income (Loss) Per Share (Tables)

6 Months Ended

Jun. 30, 2017

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

	Three months ended June 30,					Six months ended June 30,
In thousands except per share amounts	2017			2016		2017		2016
Net income (loss) available to common stockholders	$	(10,955	)	$	14,497	$	7,708	$	(5,899	)
Weighted average shares:
Basic	179,241			153,972		179,071		152,110
Effect of stock-based compensation plans	—			3,928		4,049		—
Diluted	179,241			157,900		183,120		152,110
Income (loss) per share:
Basic	$	(0.06	)	$	0.09	$	0.04	$	(0.04	)
Diluted	$	(0.06	)	$	0.09	$	0.04	$	(0.04	)