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Stock-Based Compensation (Tables) | 6 Months Ended
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May 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Outstanding and Exercisable Stock Options | The following table summarizes stock option transactions for the six months ended May 31, 2019:
| Options |  | Weighted Average Exercise Price
Options outstanding at beginning of period | 7,237,544 |  |  | $ | 16.02 |
Granted | — |  |  | — |
Exercised | (1,097,927 | ) |  | 14.95 |
Cancelled | (30,000 | ) |  | 38.24 |
Options outstanding at end of period | 6,109,617 |  |  | $ | 16.11 |
Options exercisable at end of period | 5,820,743 |  |  | $ | 16.10 |

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