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Stock-Based Benefit Plans | 6 Months Ended
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Apr. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Stock-Based Benefit Plans | Stock-Based Benefit Plans We grant stock options and various types of restricted stock units to our employees and our nonemployee directors. Additionally, we have an employee stock purchase plan that allows employees to purchase our stock at a discount. Information regarding the amount of total stock-based compensation expense and tax benefit recognized by us, for the periods indicated, is as follows (amounts in thousands):
| Six months ended April 30, |  | Three months ended April 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Total stock-based compensation expense recognized | $ | 15,347 |  |  | $ | 15,585 |  |  | $ | 6,458 |  |  | $ | 6,256 |
Income tax benefit recognized | $ | 4,359 |  |  | $ | 6,094 |  |  | $ | 1,843 |  |  | $ | 2,441 |
At April 30, 2018 and October 31, 2017, the aggregate unamortized value of outstanding stock-based compensation awards was approximately $34.3 million and $24.2 million, respectively.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -URI http://asc.fasb.org/subtopic&trid=2208855 + Details
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