Business and Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2013

Business and Significant Accounting Policies

Schedule of computation of basic and diluted net loss per share

	2013			2012			2011
	(In thousands, except per share data)
Net loss	$	(174,456	)	$	(139,881	)	$	(46,140	)
Net loss per share—basic and diluted	$	(1.72	)	$	(1.42	)	$	(0.55	)
Shares used in the computation of net loss per share—basic and diluted		101,174			98,289			84,392