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Stock Based Compensation (Tables)
12 Months Ended
Dec. 31, 2011
Stock-based Compensation [Abstract]  
Stock option transactions
                         
    Options     Weighted
Average
Exercise
Price
    Aggregate
Intrinsic
Value
 

Outstanding at December 31, 2010

    98,701     $ 32.34     $ —    

Expired or Terminated

    (73,500   $ 32.61          
   

 

 

                 

Outstanding at December 31, 2011

    25,201     $ 31.57     $ —    
   

 

 

                 
Outstanding and exercisable options
                     
    Number
Outstanding
and
Exercisable
  Remaining
Contractual  Life
    Exercise
Price
 

January 2002 Grants

  15,201     0.04     $ 30.53  

May 2002 Grants

  10,000     0.37     $ 33.15  
Summary of restricted stock award and restricted stock unit award transactions
                 
    Awards     Weighted
Average
Grant Date
Fair Value
 

Outstanding at December 31, 2010

    1,674,892     $ 7.26  

Issued

    292,339     $ 11.11  

Forfeited

    (51,024   $ 11.59  

Vested

    (510,926   $ 9.74  
   

 

 

         

Outstanding at December 31, 2011

    1,405,281     $ 7.00  
   

 

 

         
Fair value of the performance awards I and the performance awards II at issuance
                 
    Performance
Awards I
    Performance
Awards II
 

Expected dividend yield

    0.0     0.0

Expected stock volatility

    57.18% to 119.55     76.29% to 162.92

Risk-free interest rate

    0.40% to 1.84     0.43% to 2.38

Expected life (years)

    1-4       1-4  

Grant Date Fair value

  $ 4.49     $ 2.94