Net Income (Loss) Per Share (Tables)

6 Months Ended

Jun. 30, 2016

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	2016		2015			2016			2015
Net income (loss) available to common stockholders	$	14,497	$	(16,677	)	$	(5,899	)	$	(49,965	)
Weighted average shares:
Basic	153,972		135,036			152,110			118,897
Effect of stock-based compensation plans	3,928		—			—			—
Diluted	157,900		135,036			152,110			118,897
Income (loss) per share:
Basic	$	0.09	$	(0.12	)	$	(0.04	)	$	(0.42	)
Diluted	$	0.09	$	(0.12	)	$	(0.04	)	$	(0.42	)