FAIR VALUE MEASUREMENTS

6 Months Ended

Sep. 30, 2011

Fair Value Disclosures [Abstract]

Fair Value Disclosures [Text Block]

FAIR VALUE MEASUREMENTS

The following tables represent the Company’s fair value hierarchy for its financial assets and liabilities:

Fair Values as of September 30, 2011:

(in thousands)	Level 1		Level 2		Level 3		Total
Cash and cash equivalents:
Cash	$	168,875	$	—	$	—	$	168,875
U.S. Treasury Bills and Government Agency Securities	—		5,004		—		5,004
Commercial Paper	—		4,998		—		4,998
Money Market Accounts	6,500		—		—		6,500
Short-term investments:
U.S. Treasury Bills and Government Agency Securities	34,016		27,995		—		62,011
Commercial Paper	—		17,989		—		17,989
Corporate Bonds	—		22,064		—		22,064
CDs	—		2,518		—		2,518
Long-term investments:
U.S. Treasury Bills and Government Agency Securities	—		21,055		—		21,055
Corporate Bonds	—		33,084		—		33,084
CDs	—		4,891		—		4,891
Other current assets:
Derivative assets	—		2,619		—		2,619
Total assets measured at fair value	$	209,391	$	142,217	$	—	$	351,608
Accrued liabilities:
Derivative liabilities	$	23	$	2,292	$	—	$	2,315

Fair Values as of March 31, 2011:

(in thousands)	Level 1		Level 2		Level 3		Total
Cash and cash equivalents:
Cash	$	136,804	$	—	$	—	$	136,804
U.S. Treasury Bills and Government Agency Securities	74,991		7,002		—		81,993
Commercial Paper	—		22,495		—		22,495
Corporate Bonds	—		3,082		—		3,082
CDs	—		2,001				2,001
Money Market Accounts	38,000		—		—		38,000
Short-term investments:
U.S. Treasury Bills and Government Agency Securities	71,756		27,105		—		98,861
Commercial Paper	—		30,075		—		30,075
Corporate Bonds	—		11,216		—		11,216
CDs	—		5,429		—		5,429
Long-term investments:
U.S. Treasury Bills and Government Agency Securities	7,955		9,436		—		17,391
Corporate Bonds	—		19,059		—		19,059
CDs	—		2,882		—		2,882
Other current assets:
Derivative assets	—		360		—		360
Total assets measured at fair value	$	329,506	$	140,142	$	—	$	469,648
Accrued liabilities:
Derivative liabilities	$	27	$	4,174	$	—	$	4,201

Level 1 financial assets consist of cash, money market accounts and United States ("U.S.") Treasury Bills.  Level 1 financial liabilities consist of foreign exchange forward contracts not designated as hedges.  The fair value of Level 1 financial instruments is measured based on the quoted market price of identical securities.

Level 2 financial assets and liabilities consist of Government Agency Securities, Commercial Paper, Corporate Bonds, CDs and derivative foreign currency call and put option contracts.  Fair value is determined using inputs that are observable, either directly or indirectly, such as quoted market prices for similar assets or liabilities; quoted prices in markets with insufficient volume or infrequent transactions (less active markets); or model-derived valuations, such as the Black Scholes valuation model, in which all significant inputs are observable or can be derived principally from or corroborated with observable market data covering substantially the full term of the assets or liabilities. During the six months ended September 30, 2011, the Company did not have any transfers between Level 1 and Level 2 fair value instruments.

The Company had no Level 3 financial assets or liabilities as of September 30, 2011 or March 31, 2011.