Fair Value Measurements And Derivative Instruments (Tables)

12 Months Ended

Nov. 30, 2011

Fair Value Measurements And Derivative Instruments [Abstract]

Fair Value Of 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 November 30, 2011:
Assets:
Money market fund	$	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
As of November 30, 2010:
Assets:
Money market fund	$	37,016	$	37,016	$	—
Term deposits		1,313		—		1,313
Mortgage-backed securities		191		—		191
Foreign currency forward contracts		991		—		991
Liabilities:
Foreign currency forward contracts	$	53	$	—	$	53

Foreign Currency Forward Contracts

	Notional Value Local Currency		Notional Value USD		Fair Value Gain (Loss) USD
Forward contracts sold:
Brazilian real		1,700	$	933	$	(23	)
South African rand		6,100		746		(19	)
New Taiwan dollar		30,000		990		(2	)
Forward contracts bought:
British pound		5,000		7,836		80
					$	36

	Notional Value Local Currency		Notional Value Euro		Fair Value Gain (Loss) USD
Forward contracts sold:
Australian dollar		2,000	€	1,517	$	(53	)
Canadian dollar		1,500		1,092		(9	)
South African rand		50,000		4,471		(36	)
United States dollar		6,300		4,691		53
Forward contracts bought:
British pound		3,500		4,085		9
					$	(36	)

Foreign Currency Forward Contracts Not Designated As Hedging Instruments

	Derivatives not Designated as Hedging Instruments
	November 30, 2011		November 30, 2010
Foreign currency forward contracts, fair value included in:
Other Current Assets	$	142	$	991
Accrued Liabilities		142		53

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

		Amount of Gain or (Loss) Recognized In Income on Derivative
		Year Ended November 30,
Derivatives not Designated as Hedging Instruments	Location	2011		2010
Foreign Currency Contracts	Other income/(expense)	$	8,426	$	9,521