Net Loss Per Share (Tables)

12 Months Ended

Dec. 31, 2013

Calculation of Net Income (Loss) and Number of Shares Used to Compute Basic and Diluted Earnings Per Share

The calculation of net loss and the number of shares used to compute basic and diluted earnings per share for the years ended December 31, 2013, 2012 and 2011 are as follows:

In thousands, except per share amounts	2013			2012			2011
Net loss	$	(274,158	)	$	(220,872	)	$	(123,603	)
Weighted average shares outstanding – basic and diluted		183,575			164,964			132,375
Net loss per share – basic and diluted	$	(1.49	)	$	(1.34	)	$	(0.93	)

Potentially Dilutive Securities Excluded in Computation of Net Loss Per Share

For the years ended December 31, 2013, 2012 and 2011, the following potentially dilutive securities were not included in the computation of net loss per share because the effect would be anti-dilutive:

In thousands	2013		2012		2011
Stock options		10,380		8,228		7,381
Restricted stock and restricted stock units		2,048		1,903		2,785
Warrants		—		—		5,806
		12,428		10,131		15,972