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Warrants and Options Exercise Prices and Remaining Life (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Schedule of Share-based Compensation, Shares Authorized under Stock Options Plans and Warrants, by Exercise Price Range [Line Items]  
Options (shares) 1,635
Weighted-Average Remaining Life (years) 3 years
Currently Exercisable (shares) 1,512
Range of Exercise Prices $10.01 to $15.00
  
Schedule of Share-based Compensation, Shares Authorized under Stock Options Plans and Warrants, by Exercise Price Range [Line Items]  
Range of Exercise Prices, lower range limit 10
Range of Exercise Prices, upper range limit 15
Options (shares) 400
Weighted-Average Remaining Life (years) 3 years 1 month 6 days
Currently Exercisable (shares) 380
Range of Exercise Prices $15.01 to $20.00
  
Schedule of Share-based Compensation, Shares Authorized under Stock Options Plans and Warrants, by Exercise Price Range [Line Items]  
Range of Exercise Prices, lower range limit 15.01
Range of Exercise Prices, upper range limit 20
Options (shares) 1,120
Weighted-Average Remaining Life (years) 2 years 6 months
Currently Exercisable (shares) 1,120
Range of Exercise Prices $20.01 to $25.00
  
Schedule of Share-based Compensation, Shares Authorized under Stock Options Plans and Warrants, by Exercise Price Range [Line Items]  
Range of Exercise Prices, lower range limit 20.01
Range of Exercise Prices, upper range limit 25
Options (shares) 25
Weighted-Average Remaining Life (years) 4 years 3 months 18 days
Currently Exercisable (shares) 12
Range of Exercise Prices $35.01 to $40.00
  
Schedule of Share-based Compensation, Shares Authorized under Stock Options Plans and Warrants, by Exercise Price Range [Line Items]  
Range of Exercise Prices, lower range limit 35.01
Range of Exercise Prices, upper range limit 40
Options (shares) 90
Weighted-Average Remaining Life (years) 8 years 4 months 24 days
Currently Exercisable (shares) 0