|**Marketable Securities (Tables)**   | 3 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
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|**Marketable Securities [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|Marketable Securities Table          | The composition of these securities as ofJanuary 31, 2015andOctober 31, 2014is as follows.January 31, 2015October 31, 2014In thousandsCostFairValueCostFairValueCurrent trading securities:Money markets$45$45$22$22Mutual funds91153106192Total current trading securities136198128214Noncurrent trading securities:Money markets479479447447Mutual funds3,5994,0642,5983,280Total noncurrent trading securities4,0784,5433,0453,727Total trading securities$4,214$4,741$3,173$3,941
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|                                     | January 31, 2015                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|In thousands                         | Cost                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|Current trading securities:          |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|Money markets                        | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|Mutual funds                         | 91                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Total current trading securities     | 136                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|Noncurrent trading securities:       |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|Money markets                        | 479                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|Mutual funds                         | 3,599                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|Total noncurrent trading securities  | 4,078                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|Total trading securities             | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    

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