Quarterly report pursuant to Section 13 or 15(d)

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

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EQUITY (Antidilutive Securities Excluded from Computation of Earnings per Share) (Details)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Number of anti-dilutive potentially issuable shares excluded from diluted common shares outstanding 12,573 27,803 15,277 34,879
Options to purchase shares of common stock [Member]
        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Number of anti-dilutive potentially issuable shares excluded from diluted common shares outstanding 3,703 16,890 6,386 22,213
Restricted stock awards and units - unvested [Member]
        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Number of anti-dilutive potentially issuable shares excluded from diluted common shares outstanding 765 2,308 786 4,061
Warrants [Member]
        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Number of anti-dilutive potentially issuable shares excluded from diluted common shares outstanding 0 500 0 500
Conversion shares related to 2.875% convertible senior notes [Member]
        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Number of anti-dilutive potentially issuable shares excluded from diluted common shares outstanding 8,105 8,105 8,105 8,105