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Stock-Based Compensation (Tables) | 12 Months Ended
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Jan. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Summary of Activity under Option and Stock Plans | A summary of activity under the Option and Stock Plans for the three years ended January 31, 2014 is presented below:
|  | Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Term (years) |  |  | Weighted Average Fair Value |
Outstanding, February1, 2011 |  |  | 675,724 |  |  | $ | 11.29 |  |  |  | 5.78 |  |  | $ | 5.79 |
Granted |  |  | 212,500 |  |  | $ | 13.92 |  |  |  |  |  |  |  |  |
Exercised |  |  | (55,038 | ) |  | $ | 9.36 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (16,000 | ) |  | $ | 11.36 |  |  |  |  |  |  |  |  |
Outstanding, January 31, 2012 |  |  | 817,186 |  |  | $ | 12.10 |  |  |  | 4.94 |  |  | $ | 5.68 |
Granted |  |  | 293,000 |  |  | $ | 17.36 |  |  |  |  |  |  |  |  |
Exercised |  |  | (153,962 | ) |  | $ | 9.33 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (30,000 | ) |  | $ | 8.66 |  |  |  |  |  |  |  |  |
Outstanding, January 31, 2013 |  |  | 926,224 |  |  | $ | 14.34 |  |  |  | 5.39 |  |  | $ | 5.93 |
Granted |  |  | 303,000 |  |  | $ | 21.32 |  |  |  |  |  |  |  |  |
Exercised |  |  | (309,074 | ) |  | $ | 12.20 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (4,000 | ) |  | $ | 17.33 |  |  |  |  |  |  |  |  |
Outstanding, January 31, 2014 |  |  | 916,150 |  |  | $ | 17.36 |  |  |  | 6.04 |  |  | $ | 5.58 |
Exercisable, January 31, 2014 |  |  | 613,150 |  |  | $ | 15.40 |  |  |  | 5.09 |  |  | $ | 6.15 |
Summary of Change in Number of Non-Vested Options to Purchase Shares of Common Stock | A summary of the change in the number of shares of common stock subject to non-vested options to purchase such shares for the three years ended January 31, 2014 is presented below:
|  | Shares |  |  | Weighted Average Fair Value |
Non-vested, February 1, 2011 |  |  | 237,000 |  |  | $ | 6.31 |
Granted |  |  | 212,500 |  |  | $ | 5.09 |
Vested |  |  | (232,000 | ) |  | $ | 6.34 |
Forfeited (non-vested) |  |  | (5,000 | ) |  | $ | 4.98 |
Non-vested, January 31, 2012 |  |  | 212,500 |  |  | $ | 5.09 |
Granted |  |  | 293,000 |  |  | $ | 5.65 |
Vested |  |  | (112,000 | ) |  | $ | 4.51 |
Forfeited (non-vested) |  |  | (5,000 | ) |  | $ | 6.32 |
Non-vested, January 31, 2013 |  |  | 388,500 |  |  | $ | 5.67 |
Granted |  |  | 303,000 |  |  | $ | 4.40 |
Vested |  |  | (384,500 | ) |  | $ | 5.67 |
Forfeited (non-vested) |  |  | (4,000 | ) |  | $ | 5.71 |
Non-vested, January 31, 2014 |  |  | 303,000 |  |  | $ | 4.40 |
Summary of Assumptions Used to Estimate Fair Value of Stock Options Granted | The fair value amounts per share of options to purchase shares of the Company’s common stock awarded during the fiscal years ended January 31, 2014, 2013 and 2012 were determined at the dates of grant using the following weighted-average assumptions:
|  | 2014 |  | 2013 |  | 2012
Risk-free interest rate |  | 1.33% |  | 1.93% |  | 2.57%
Expected volatility |  | 32.73% |  | 35.51% |  | 44.88%
Expected life |  | 4.70 years |  | 4.56 years |  | 4.26 years
Dividend yield |  | 3.39% |  | — % |  | — %

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