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Share-Based Compensation Arrangements (Tables)
9 Months Ended
Sep. 30, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
The fair value of each SAR was estimated as of September 30, 2012 and 2011 using the following assumptions: 
 
September 30, 2012
 
September 30, 2011
Risk-free interest rate
0.25-0.49%

 
0.53-1.04%

Dividend yield
0.0
%
 
0.0
%
Expected life (years)
2.4-4.3 years

 
3.4-5.3 years

Volatility
65.55
%
 
82.87
%