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Stock-Based Compensation (Details) - $ / shares | 12 Months Ended
--- | ---
Jan. 31, 2017 | Jan. 31, 2016 | Jan. 31, 2015
Schedule of transactions for stock options under Plan |  |  |
Outstanding Option Beginning Balance | 699,600 | 616,220 | 599,406
Options granted | 200,346 | 126,880 | 116,880
Options exercised | (40,588) | (28,450) | (86,066)
Options cancelled |  | (15,050) | (14,000)
Outstanding Option Ending Balance | 859,358 | 699,600 | 616,220
Weighted Average Exercise Price, Beginning Balance | $ 30.41 | $ 30.08 | $ 26.24
Options granted, Weighted Average Exercise Price | 26.97 | 30.36 | 41.71
Options exercised, Weighted Average Exercise Price | 25.68 | 21.49 | 19.75
Options cancelled, Weighted Average Exercise Price |  | 33.32 | 26.59
Weighted Average Exercise Price, Ending Balance | $ 29.83 | $ 30.41 | $ 30.08

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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + 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)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + 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)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. + References No definition available. + Details
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