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Acquisitions - Additional Information (Detail) (USD $)
9 Months Ended 9 Months Ended
Jul. 31, 2012
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May 01, 2012
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Jul. 31, 2012
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Other Identifiable Intangibles
Customer Contracts And Relationships
Dec. 01, 2010
The Linc Group LLC
Business Acquisition [Line Items]        
Business acquisition purchase price   $ 6,200,000    
Business acquisition, security held back for sellers' indemnification obligation   800,000    
Related acquisition cost 200,000      
Finite lived intangible asset useful life     14 years  
Business acquisition purchase price allocation goodwill expected tax deductible amount   4,000,000    
Revenues from acquired business 2,000,000      
Business acquisition aggregate purchase price   $ 5,471,000   $ 298,700,000