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Stock Repurchase Program (Tables) | 12 Months Ended
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Oct. 31, 2017
Stock Repurchase Program [Abstract] |
Stock Repurchase And Reissuance Activities | The following table summarizes stock repurchase activities as well as the reissuance of treasury stock for employee stock-based compensation purposes:
| Year Ended October 31,
| 2017 |  | 2016 |  | 2015
| (in thousands, except per share price)
Shares repurchased(1) | 5,413 |  |  | 8,506 |  |  | 5,672 |
Average purchase price per share(1) | $ | 70.21 |  |  | $ | 49.37 |  |  | $ | 45.84 |
Aggregate purchase price(1) | $ | 380,000 |  |  | $ | 420,000 |  |  | $ | 260,000 |
Reissuance of treasury stock | 4,404 |  |  | 4,803 |  |  | 4,864 |
(1) | Does not include the 181,988 shares and $20.0 million equity forward contract, respectively, from the September 2017 ASR settled in November 2017.

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- Definition Tabular disclosure of treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23309-112656 + Details
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