Annual report pursuant to Section 13 and 15(d)

STOCKHOLDERS' EQUITY, Antidilutive Securities Excluded from Computation of Earnings per Share (Details)

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STOCKHOLDERS' EQUITY, Antidilutive Securities Excluded from Computation of Earnings per Share (Details)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Number of antidilutive potentially issuable shares excluded from diluted common shares outstanding (in shares) 36,534 34,062 33,100
Options To Purchase Shares of Common Stock [Member]
      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Number of antidilutive potentially issuable shares excluded from diluted common shares outstanding (in shares) 24,722 21,429 20,464
Restricted Stock Awards and Units - Unvested [Member]
      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Number of antidilutive potentially issuable shares excluded from diluted common shares outstanding (in shares) 3,207 4,028 4,031
Warrants [Member]
      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Number of antidilutive potentially issuable shares excluded from diluted common shares outstanding (in shares) 500 500 500
Conversion Shares Related to 2.875% Convertible Senior Notes [Member]
      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Number of antidilutive potentially issuable shares excluded from diluted common shares outstanding (in shares) 8,105 8,105 8,105