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Net Income per Common Share | 9 Months Ended
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Oct. 31, 2019
Earnings Per Share [Abstract] |
Net Income per Common Share | 11. 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 |  |  | Nine Months Ended |
|  | October 31, |  |  | October 31, |
|  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Basic weighted-average common shares outstanding |  |  | 97,972,864 |  |  |  | 108,778,483 |  |  |  | 100,458,726 |  |  |  | 108,702,575 |
Effect of dilutive options, stock appreciation rights, performance stock units and restricted stock units |  |  | 655,305 |  |  |  | 1,484,396 |  |  |  | 688,299 |  |  |  | 1,446,530 |
Diluted weighted-average shares outstanding |  |  | 98,628,169 |  |  |  | 110,262,879 |  |  |  | 101,147,025 |  |  |  | 110,149,105 |
For the three months ended October 31, 2019 and 2018, awards to purchase 415,000 common shares ranging in price from $28.47 to $46.42 and 240,000 common shares ranging in price from $46.02 to $46.42, respectively, were excluded from the calculation of diluted net income per common share because the impact would be anti-dilutive. For the nine months ended October 31, 2019 and 2018, awards to purchase 405,000 common shares ranging in price from $28.47 to $46.42 and 249,167 common shares ranging in price from $37.02 to $46.42, respectively, were excluded from the calculation of diluted net income per common share because the impact would be anti-dilutive. Excluded from the calculation of diluted net income per common share as of October 31, 2019 and 2018 were 370,633 and 742,855 performance-based equity awards, respectively, because they did not meet the required performance criteria.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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