AUCTION RATE SECURITIES - Additional Information (Detail) (USD $)	12 Months Ended
Oct. 31, 2011 Entity	Feb. 11, 2011	Oct. 31, 2010
Schedule of Available-for-sale Securities [Line Items]
Number of different issuers the Company held investments in for auction rate securities	4
Investments in auction rate securities	$ 20,000,000
Auction rate securities, maturity range, low	2025
Auction rate securities, maturity range, high	2050
Investments in auction rate securities, estimated fair value	15,670,000		20,171,000
Redeemed auction rate securities by the issuer, par value		5,000,000
Unrealized losses recorded in accumulated other comprehensive loss, before tax	2,600,000		3,100,000
Unrealized losses recorded in accumulated other comprehensive loss, net of taxes	1,600,000		1,900,000
Single Issuer Investment
Schedule of Available-for-sale Securities [Line Items]
Investments in auction rate securities	$ 5,000,000

Accumulated appreciation or loss, net of tax, in value of the total of available-for-sale securities at the end of an accounting period.

+ References+ Details

For an unclassified balance sheet, total of debt securities categorized neither as held-to-maturity nor trading.

+ References

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+ Details

- Definition

Total of debt securities categorized neither as held-to-maturity nor trading which are intended be sold or mature more than one year from the balance sheet date or operating cycle, if longer.

+ References

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