Per Share Data (Tables)

9 Months Ended

Sep. 30, 2011

Per Share Data [Abstract]

Basic and diluted net loss per share

The calculations of basic and diluted net loss per share are as follows:

	Three Months Ended  September 30,
	2011	2010
Net loss (Numerator)	$(62,365)	$(33,875)
Weighted-average shares, in thousands (Denominator)	91,046	81,638
Basic and diluted net loss per share	$(0.68)	$(0.41)

	Nine Months Ended  September 30,
	2011	2010
Net loss (Numerator)	$(168,317)	$(89,871)
Weighted-average shares, in thousands (Denominator)	90,215	81,433
Basic and diluted net loss per share	$(1.87)	$(1.10)

Antidilutive securities

Shares issuable upon the exercise of stock options and vesting of restricted stock awards, which have been excluded from the September 30, 2011 and 2010 diluted per share amounts because their effect would have been antidilutive, include the following:

	Three months ended September 30,
	2011	2010
Stock Options:
Weighted average number, in thousands	20,395	21,265
Weighted average exercise price	$21.24	$18.76
Restricted Stock:
Weighted average number, in thousands	854	511

	Nine months ended September 30,
	2011	2010
Stock Options:
Weighted average number, in thousands	21,239	21,317
Weighted average exercise price	$20.72	$18.67
Restricted Stock:
Weighted average number, in thousands	848	507