|
Stock-Based Compensation (Details 2)
|
3 Months Ended |
|---|---|
|
Apr. 30, 2013
|
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| Summary of assumptions used to estimate fair value of stock options granted | |
| Dividend yield | 3.73% |
| Expected volatility | 33.44% |
| Risk-free interest rate | 0.81% |
| Expected life in years | 5 years 6 months 0 days |