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STOCK-BASED COMPENSATION (Tables) | 12 Months Ended
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Jan. 31, 2016
STOCK-BASED COMPENSATION |
Summary of Activity under Option and Stock Plans | Summaries of activity under the Company’s stock option plans for the years ended January 31, 2017, 2016 and 2015, along with the corresponding weighted average per share amounts, are presented below (shares in thousands):
|  | Shares |  | Weighted Average Exercise Price |  | Weighted Average Remaining Term (years) |  | Weighted Average Fair Value |
Outstanding, January 31, 2014 |  | 916 |  | $ | 17.36 |  | 6.04 |  | $ | 5.58 |
Granted |  | 306 |  | $ | 21.09 |  |  |  |  |
Exercised |  | (346 | ) | $ | 15.61 |  |  |  |  |
Outstanding, January 31, 2015 |  | 876 |  | $ | 22.34 |  | 7.08 |  | $ | 6.01 |
Granted |  | 300 |  | $ | 34.70 |  |  |  |  |
Exercised |  | (106 | ) | $ | 17.10 |  |  |  |  |
Forfeited |  | (6 | ) | $ | 17.33 |  |  |  |  |
Outstanding, January 31, 2016 |  | 1,064 |  | $ | 26.38 |  | 6.36 |  | $ | 6.91 |
Granted |  | 270 |  | $ | 57.88 |  |  |  |  |
Exercised |  | (622 | ) | $ | 25.57 |  |  |  |  |
Forfeited |  | (5 | ) | $ | 36.73 |  |  |  |  |
Outstanding, January 31, 2017 |  | 707 |  | $ | 39.04 |  | 7.82 |  | $ | 10.22 |
Exercisable, January 31, 2017 |  | 437 |  | $ | 27.40 |  | 6.68 |  | $ | 7.31 |
Summary of Change in Number of Non-Vested Options to Purchase Shares of Common Stock | The changes in the number of non-vested options to purchase shares of common stock for the years ended January 31, 2017, 2016 and 2015, and the weighted average fair value per share for each number, are presented below (shares in thousands):
|  | Shares |  | Weighted Average Fair Value |
Non-vested, January 31, 2014 |  | 303 |  | $ | 4.40 |
Granted |  | 306 |  | $ | 7.14 |
Vested |  | (303 | ) | $ | 4.40 |
Non-vested, January 31, 2015 |  | 306 |  | $ | 7.14 |
Granted |  | 300 |  | $ | 8.97 |
Vested |  | (306 | ) | $ | 7.14 |
Non-vested, January 31, 2016 |  | 300 |  | $ | 8.97 |
Granted |  | 270 |  | $ | 14.93 |
Vested |  | (300 | ) | $ | 8.97 |
Non-vested, January 31, 2017 |  | 270 |  | $ | 14.93 |
Summary of Assumptions Used to Estimate Fair Value of Stock Options Granted |
|  | 2017 |  | 2016 |  | 2015 |
Dividend yield |  | 1.4 | % | 2.0 | % | 3.5 | %
Expected volatility |  | 34.6 | % | 34.8 | % | 33.7 | %
Risk-free interest rate |  | 1.7 | % | 1.3 | % | 1.3 | %
Expected life (in years) |  | 4.2 |  | 4.9 |  | 4.9 |

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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