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Stock-Based Compensation (Tables) | 12 Months Ended
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Jan. 31, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Schedule of Transactions for Stock Options Under Plan | Transactions for stock options under the Plan since fiscal 2014 are summarized as follows:
| Outstanding Options |  |  | Weighted- Average Exercise Price |
January 31, 2014 |  | 599,406 |  |  | $ | 26.24 |
Options granted |  | 116,880 |  |  | $ | 41.71 |
Options exercised |  | (86,066 | ) |  | $ | 19.75 |
Options cancelled |  | (14,000 | ) |  | $ | 26.59 |
January 31, 2015 |  | 616,220 |  |  | $ | 30.08 |
Options granted |  | 126,880 |  |  | $ | 30.36 |
Options exercised |  | (28,450 | ) |  | $ | 21.49 |
Options cancelled |  | (15,050 | ) |  | $ | 33.32 |
January 31, 2016 |  | 699,600 |  |  | $ | 30.41 |
Options granted |  | 200,346 |  |  | $ | 26.97 |
Options exercised |  | (40,588 | ) |  | $ | 25.68 |
Options cancelled |  | — |  |  | $ | — |
January 31, 2017 |  | 859,358 |  |  | $ | 29.83 |
Schedule of Outstanding and Exercisable Stock Options | The following table summarizes outstanding and exercisable stock options as of January 31, 2017:
Range of Exercise Prices |  | Number Outstanding |  |  | Weighted- Average Remaining Contractual Life (years) |  |  | Weighted- Average Exercise Price |  |  | Number Exercisable |  |  | Weighted- Average Exercise Price |
$21.03 - $24.02 |  |  | 93,750 |  |  |  | 3.4 |  |  | $ | 22.09 |  |  |  | 68,750 |  |  | $ | 22.29 |
$24.03 - $27.02 |  |  | 183,612 |  |  |  | 5.2 |  |  | $ | 26.59 |  |  |  | 183,612 |  |  | $ | 26.59 |
$27.03 - $30.02 |  |  | 175,346 |  |  |  | 9.2 |  |  | $ | 27.74 |  |  |  | — |  |  | $ | — |
$30.03 - $33.02 |  |  | 293,570 |  |  |  | 5.6 |  |  | $ | 30.98 |  |  |  | 196,040 |  |  | $ | 31.28 |
$33.03 - $42.02 |  |  | 29,780 |  |  |  | 7.4 |  |  | $ | 40.52 |  |  |  | 19,853 |  |  | $ | 40.52 |
$42.03 - $45.02 |  |  | 83,300 |  |  |  | 7.2 |  |  | $ | 42.12 |  |  |  | 14,000 |  |  | $ | 42.12 |
|  |  | 859,358 |  |  |  | 5.7 |  |  | $ | 29.83 |  |  |  | 482,255 |  |  | $ | 28.91 |
Schedule of Transactions for Restricted Stock Units Under Plan | Transactions for stock award units under the Plan since fiscal 2014 are summarized as follows:
| Number of Stock Award Units |  |  | Weighted- Average Grant Date Fair Value |
January 31, 2014 |  | 303,170 |  |  | $ | 24.84 |
Units granted |  | 164,122 |  |  | $ | 41.32 |
Units vested |  | (118,368 | ) |  | $ | 18.66 |
Units forfeited |  | (11,568 | ) |  | $ | 33.58 |
January 31, 2015 |  | 337,356 |  |  | $ | 34.72 |
Units granted |  | 136,310 |  |  | $ | 29.48 |
Units vested |  | (83,578 | ) |  | $ | 29.99 |
Units forfeited |  | (15,490 | ) |  | $ | 35.70 |
January 31, 2016 |  | 374,598 |  |  | $ | 33.83 |
Units granted |  | 187,777 |  |  | $ | 27.76 |
Units vested |  | (170,010 | ) |  | $ | 31.85 |
Units forfeited |  | (11,207 | ) |  | $ | 34.50 |
January 31, 2017 |  | 381,158 |  |  | $ | 31.71 |

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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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- Definition Tabular disclosure of the change in stock options. + References No definition available. + Details
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