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STOCK-BASED COMPENSATION (Details 2) (Employee Stock Option Plan)
9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Employee Stock Option Plan
   
Fair value of options weighted average assumptions:    
Pricing model used for valuation of options Black-Scholes  
Risk-free interest rate (as a percent) 1.25% 1.95%
Expected life of options 2 years 9 months 18 days 2 years 6 months
Expected volatility of the Company's share price (as a percent) 37.52% 34.63%
Expected dividend yield (as a percent) 2.14% 0.89%