Fair Value Measurements (Tables)

9 Months Ended

Oct. 31, 2011

Fair Value Measurements [Abstract]

Schedule Of Financial Instruments

	October 31, 2011
	Quoted Prices to Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value
	(In thousands)
Financial Assets:
Commercial paper (1)	$	—	$	9,382	$	—	$	9,382
Money market funds (1)		150,553		—		—		150,553
Auction rate securities		—		—		50,259		50,259
Derivative assets		—		827		—		827
Contingent consideration asset recorded for sale of business		—		—		780		780
	$	150,553	$	10,209	$	51,039	$	211,801
Financial Liabilities:
Derivative liabilities	$	—	$	1,426	$	—	$	1,426
Contingent consideration liability for business combination		—		—		34,623		34,623
	$	—	$	1,426	$	34,623	$	36,049

	January 31, 2011
	Quoted Prices to Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value
	(In thousands)
Financial Assets:
Commercial paper (1)	$	—	$	9,375	$	—	$	9,375
Money market funds (1)		186,414		—		—		186,414
Auction rate securities		—		—		72,441		72,441
Derivative assets		—		957		—		957
Contingent consideration asset recorded for sale of business		—		—		722		722
	$	186,414	$	10,332	$	73,163	$	269,909
Financial Liabilities:
Derivative liabilities	$	—	$	1,926	$	—	$	1,926
Contingent consideration liability for business combination		—		—		3,686		3,686
	$	—	$	1,926	$	3,686	$	5,612

(1) As of October 31, 2011, $145.9 million of commercial paper and money market funds were classified in "Cash and cash equivalents" and $14.1 million of money market funds were classified in "Restricted cash and bank deposits" within the condensed consolidated balance sheets. As of January 31, 2011, $162.4 million of commercial paper and money market funds were classified in "Cash and cash equivalents" and $33.4 million of money market funds were classified in "Restricted cash and bank time deposits" within the condensed consolidated balance sheets.

Schedule Of Changes In The Fair Value Of The Level 3 Financial Assets And Liabilities

	Level Three Financial Assets and Liabilities
	Three Months Ended October 31,											Nine Months Ended October 31,
	2011						2010					2011						2010
	Asset			Liability			Asset			Liability		Asset			Liability			Asset			Liability
	(In thousands)											(In thousands)
Beginning balance	$	52,612		$	2,364		$	69,349		$	3,306	$	73,163		$	3,686		$	114,650		$	—
Sales and redemptions		(250	)		—			(2,522	)		—		(25,750	)		—			(57,018	)		—
Change in realized and unrealized gains included in other income, net		120			—			1,625			—		8,011			—			23,715			—
Change in unrealized losses included in other comprehensive income		(1,463	)		—			1,143			—		(4,443	)		—			(11,374	)		—
Impairment charges		—			—			(29	)		—		—			—			(407	)		—
Contingent consideration liability recorded for business combination		—			32,800			—			—		—			33,704			—			3,224
Payments of contingent consideration		—			—			—			—		—			(4,107	)		—			—
Change in fair value recorded in operating expenses		20			(541	)		—			141		58			1,340			—			223
Ending balance	$	51,039		$	34,623		$	69,566		$	3,447	$	51,039		$	34,623		$	69,566		$	3,447