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Cost Reduction Actions (Details of Future Cash Payments) (Details) (USD $)
Apr. 30, 2012
Oct. 31, 2008
Cost Reduction Actions [Abstract]    
Facility-related exit cost liability, Noncurrent $ 3,225,000  
Less net cash to be received in next twelve months (410,000)  
Interest expense to be accreted in future periods 1,471,000  
Total net estimated facility-related exit costs $ 4,286,000 $ 4,141,000