Fair Value Measurements and Derivative Instruments (Tables)

3 Months Ended

Feb. 28, 2012

Fair Value Measurements And Derivative Instruments [Abstract]

Fair Value Hierarchy Of Our Cash Equivalents, Marketable Securities And Foreign Currency Contracts

			Fair Value Measurements at Reporting Date using
Description	Total Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant other Observable Inputs (Level 2)
As of February 28, 2012:
Assets:
Money market funds	$	16,687	$	16,687	$	—
Term deposits		595		—		595
Mortgage-backed securities		209		—		209
Liabilities:
Foreign currency forward contracts	$	70	$	—	$	70
As of November 30, 2011:
Assets:
Money market funds	$	16,664	$	16,664	$	—
Term deposits		560		—		560
Mortgage-backed securities		225		—		225
Foreign currency forward contracts		142		—		142
Liabilities:
Foreign currency forward contracts	$	142	$	—	$	142

Foreign Currency Forward Contracts

	Notional Value Local  Currency		Notional Value USD		Fair Value Gain (Loss) USD
Forward contracts denominated in United States dollars sold:
Brazilian real		1,700		980		(5	)
New Taiwan dollar		30,000		1,019		(9	)
					$	(14	)

	Notional Value Local  Currency		Notional Value EURO		Fair Value Gain (Loss) USD
Forward contracts denominated in Euros sold:
Australian dollar		2,200	€	1,786	$	(20	)
South African rand		46,000		4,610		(36	)
					$	(56	)

Foreign Currency Forward Contracts Not Designated As Hedging Instruments

	Derivatives not Designated as Hedging Instruments
	February 28, 2012		November 30, 2011
Foreign currency forward contracts, fair value included in:
Other Current Assets	$	—	$	142
Accrued Liabilities		70		142

Gain Or (Loss) Recognized In Income On Derivatives Not Designated As Hedging Instruments

			Amount of Gain or (Loss) Recognized In Income on Derivative
			Three Months Ended February 28,
Derivatives not Designated as Hedging Instruments	Location		2012		2011
Foreign Currency Contracts		Other income/(expense)		$(1,358)		$(4,434)