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Shareholders' Equity (Tables) | 12 Months Ended
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Jan. 31, 2017
Share Repurchase Activity | Share repurchase activity under the Company’s share repurchase programs is as follows:
|  | Fiscal Year Ended January 31, |
|  | 2017 |  |  | 2016 |
Number of common shares repurchased and subsequently retired |  |  | 1,324,700 |  |  |  | 14,961,710 |
Total cost |  | $ | 45,787 |  |  | $ | 465,304 |
Average cost per share, including commissions |  | $ | 34.56 |  |  | $ | 31.10 |

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