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Net Income per Common Share (Tables) | 3 Months Ended
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Apr. 30, 2019
Earnings Per Share [Abstract] |
Reconciliation of Weighted Average Common Shares Outstanding Used for Computation of Basic and Diluted Net Income per Common Share | The following is a reconciliation of the weighted-average common shares outstanding used for the computation of basic and diluted net income per common share:
|  | Three Months Ended |
|  | April 30, |
|  | 2019 |  |  | 2018 |
Basic weighted-average common shares outstanding |  |  | 104,437,460 |  |  |  | 108,490,926 |
Effect of dilutive options, stock appreciation rights, performance stock units and restricted stock units |  |  | 902,688 |  |  |  | 1,252,751 |
Diluted weighted-average shares outstanding |  |  | 105,340,148 |  |  |  | 109,743,677 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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