Quarterly report pursuant to Section 13 or 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)
3 Months Ended 9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from diluted EPS calculation (in shares) 27,421 28,984 27,421 33,511
Options To Purchase Shares of Common Stock [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from diluted EPS calculation (in shares) 16,234 17,143 16,234 21,257
Restricted Stock Awards and Units - Unvested [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from diluted EPS calculation (in shares) 2,582 3,236 2,582 3,649
Warrants [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from diluted EPS calculation (in shares) 500 500 500 500
Conversion Shares Related to 2.875% Convertible Senior Notes [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from diluted EPS calculation (in shares) 8,105 8,105 8,105 8,105