Fair Value Measures (Non-Marketable Equity Securities) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Jan. 31, 2011
Fair Value Measures [Line Items]
Non-marketable equity securities	$ 92
Write-down of long-term investments	(908)
Significant Unobservable Inputs (Level 3) [Member]
Fair Value Measures [Line Items]
Non-marketable equity securities	$ 92

The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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