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STOCKHOLDERS' EQUITY (Tables) | 12 Months Ended
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Jan. 31, 2018
Stockholders' Equity Note [Abstract] |
Schedule of restricted stock |
|  |  | Awards Outstanding |  |  | Weighted Average Grant Date Fair Value |
Unvested as of January 31, 2016 |  |  |  |  | 2,048,883 |  |  |  |  | $ | 30.79 |  |
Granted |  |  |  |  | 630,642 |  |  |  |  | $ | 25.82 |  |
Vested |  |  |  |  | (678,164) |  |  |  |  | $ | 22.43 |  |
Canceled |  |  |  |  | (2,500) |  |  |  |  | $ | 17.95 |  |
Unvested as of January 31, 2017 |  |  |  |  | 1,998,861 |  |  |  |  | $ | 31.70 |  |
Granted |  |  |  |  | 279,479 |  |  |  |  | $ | 16.28 |  |
Vested |  |  |  |  | (495,372) |  |  |  |  | $ | 26.39 |  |
Canceled |  |  |  |  | (10,391) |  |  |  |  | $ | 28.42 |  |
Unvested as of January 31, 2018 |  |  |  |  | 1,772,577 |  |  |  |  | $ | 29.51 |  |
Schedule of information regarding stock options |
|  |  | 2018 |  |  | 2017 |  |  | 2016 |
|  |  | Shares |  |  | Weighted Average Exercise |  |  | Shares |  |  | Weighted Average Exercise |  |  | Shares |  |  | Weighted Average Exercise |
Stock options outstanding at beginning of year |  |  |  |  | 251,131 |  |  |  |  | $ | 9.16 |  |  |  |  |  | 331,651 |  |  |  |  | $ | 10.59 |  |  |  |  |  | 469,176 |  |  |  |  | $ | 11.16 |  |
Exercised |  |  |  |  | (188,465) |  |  |  |  | $ | 8.38 |  |  |  |  |  | (20,520) |  |  |  |  | $ | 12.65 |  |  |  |  |  | (37,525) |  |  |  |  | $ | 11.11 |  |
Granted |  |  |  |  | — |  |  |  |  | $ | — |  |  |  |  |  | — |  |  |  |  | $ | — |  |  |  |  |  | — |  |  |  |  | $ | — |  |
Cancelled or forfeited |  |  |  |  | — |  |  |  |  | $ | — |  |  |  |  |  | (60,000) |  |  |  |  | $ | 15.87 |  |  |  |  |  | (100,000) |  |  |  |  | $ | 13.08 |  |
Stock options outstanding at end of year |  |  |  |  | 62,666 |  |  |  |  | $ | 11.50 |  |  |  |  |  | 251,131 |  |  |  |  | $ | 9.16 |  |  |  |  |  | 331,651 |  |  |  |  | $ | 10.59 |  |
Exercisable |  |  |  |  | 62,666 |  |  |  |  | $ | 11.50 |  |  |  |  |  | 251,131 |  |  |  |  | $ | 9.16 |  |  |  |  |  | 253,151 |  |  |  |  | $ | 9.07 |  |
Schedule of information about stock options outstanding |
Range of Exercise Prices |  |  | Number Outstanding as of January 31, 2018 |  |  | Weighted Average Remaining Contractual Life |  |  | Weighted Average Exercise Price |  |  | Number Exercisable as of January 31, 2018 |  |  | Weighted Average Exercise Price |
$0.00 – $12.00 |  |  |  |  | 25,600 |  |  |  |  |  | 0.93 |  |  |  |  | $ | 6.56 |  |  |  |  |  | 25,600 |  |  |  |  | $ | 6.56 |  |
$12.01 – $16.00 |  |  |  |  | 20,400 |  |  |  |  |  | 2.36 |  |  |  |  | $ | 12.51 |  |  |  |  |  | 20,400 |  |  |  |  | $ | 12.51 |  |
$16.01 – $40.00 |  |  |  |  | 16,666 |  |  |  |  |  | 4.19 |  |  |  |  | $ | 17.85 |  |  |  |  |  | 16,666 |  |  |  |  | $ | 17.85 |  |
|  |  |  |  | 62,666 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 62,666 |  |  |  |  |  |  |  |

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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=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: 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=96867065&loc=d3e5070-113901 + Details
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