| **Marketable Securities**            | 9 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
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| **Marketable Securities [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
| Marketable Securities                | Marketable SecuritiesWe have marketable securities that are invested in money market and mutual funds that are liquid and actively traded on the exchanges. These securities are assets that are held in rabbi trusts established for our deferred compensation plans. For further information on the deferred compensation plans, see Note 11 to the condensed consolidated financial statements in this Form 10-Q.We have classified these marketable securities as trading securities since their inception as the assets are held in rabbi trusts. Trading securities are recorded at fair value on the Condensed Consolidated Balance Sheets with any gains or losses recognized currently in earnings. We do not intend to engage in active trading of the securities, and participants in the deferred compensation plans may redirect their deemed investments at any time. We have matched the current portion of the deferred compensation liability with the current asset and the noncurrent deferred compensation liability with the noncurrent asset; the current asset portion is included in “Other current assets” in “Current Assets” in the Condensed Consolidated Balance Sheets.The money market investments in the trusts approximate fair value due to the short period of time to maturity. The fair values of the equity securities are based on quoted market prices as traded on the exchanges. The composition of these securities as of July 31, 2016 and October 31, 2015 is as follows.  July 31, 2016 October 31, 2015In thousandsCost FairValue Cost FairValueCurrent trading securities:       Money markets$26 $26 $51 $51Mutual funds217 250 114 185Total current trading securities243 276 165 236Noncurrent trading securities:       Money markets579 579 465 465Mutual funds4,045 4,557 3,625 4,201Total noncurrent trading securities4,624 5,136 4,090 4,666Total trading securities$4,867$5,412$4,255$4,902 |

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| - Definition
The entire disclosure for  investments in certain debt and equity securities.
+ References
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| - References
No definition available.
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