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Changes in Allowance for Doubtful Accounts (Detail) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | |||||||
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Oct. 31, 2012
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Oct. 31, 2011
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Oct. 31, 2010
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| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||||||
| Balance at Beginning of Period | $ 2,489 | $ 2,727 | $ 3,587 | |||||
| Provisions | 3,754 | 1,058 | (899) | |||||
| Write-offs | (171) | [1] | (1,296) | [1] | 39 | [1] | ||
| Balance at End of Period | $ 6,072 | $ 2,489 | $ 2,727 | |||||
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