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Stock, Stock Options and Rights Narrative (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Month
Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized $ 46,074  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, First Year Percentage 25.00%  
Preferred stock, shares authorized 5,000,000 5,000,000
Preferred stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 600,000,000 600,000,000
Common stock, par value $ 0.001 $ 0.001
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, After First Year, Quarterly Percentage 6.25%  
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition 28  
1996 Stock Incentive Program [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date P10Y  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit, Percent 100.00%  
Share-based Compensation, Shares Authorized under Stock Option Plans, Voting Rights Held Benchmark, Percent 10.00%  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range if Voting Rights Held Above Benchmark, Lower Range Limit, Percent 110.00%  
2008 Inducement Award Plan [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date P10Y  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit, Percent 100.00%  
Share-based Compensation Arrangement by Share-based Payment Award, Current Employees, Award Vesting Rights, After Third Year, Quarterly Percentage 25.00%  
2009 Incentive Plan [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period, Minimum P3Y  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period, Maximum P4Y  
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date P10Y  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit, Percent 100.00%  
Sitting Director [Member] | 2009 Incentive Plan [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date P5Y  
Newly Elected Director [Member] | 2009 Incentive Plan [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date P10Y