Net Loss Per Share Data (Tables)

12 Months Ended

Dec. 31, 2011

Net Loss Per Share Data [Abstract]

Basic and Diluted Net Loss Per Share

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

	December 31,
	2011	2010	2009
Net loss (Numerator)	$(221,760)	$(104,468)	$(67,830)
Weighted-average shares, in thousands (Denominator)	90,610	82,926	79,782
Basic and diluted net loss per share	$(2.45)	$(1.26)	$(0.85)

Antidilutive Securities

Shares issuable upon the exercise of options and warrants, vesting of restricted stock awards, and conversion of convertible senior notes, which have been excluded from the diluted per share amounts because their effect would have been antidilutive, include the following:

		December 31,
	2011	2010	2009
Options:
Weighted average number, in thousands	20,942	21,428	20,040
Weighted average exercise price	$21.21	$18.80	$17.66
Restricted Stock:
Weighted average number, in thousands	846	526	500
Convertible Senior Notes:
Weighted average number, in thousands	939
Warrants:
Weighted average number, in thousands	939