Business and Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Business and Significant Accounting Policies

Schedule of computation of basic and diluted net loss per share

	2012			2011			2010
	(In thousands, except per share data)
Net loss	$	(139,881	)	$	(46,140	)	$	(66,065	)
Net loss per share—basic and diluted	$	(1.42	)	$	(0.55	)	$	(0.82	)
Shares used in the computation of net loss per share—basic and diluted		98,289			84,392			81,017