FAIR VALUE MEASUREMENTS (Tables)

6 Months Ended

Sep. 30, 2012

Schedule Of Financial Assets And Liabilities

The following tables present the Company’s financial assets and liabilities measured on a recurring basis using the fair value hierarchy as of September 30, 2012 and March 31, 2012. The fair value hierarchy has three levels based on the reliability of the inputs used to determine fair value. Level 1 refers to fair values determined based on quoted prices in active markets for identical assets. Level 2 refers to fair values estimated using significant other observable inputs, and Level 3 includes fair values estimated using significant non-observable inputs.


	Fair Value Measurements at September 30, 2012
	Level 1		Level 2			Level 3			Total
ASSETS:
Cash and cash equivalents	$	160,386	$	0		$	0		$	160,386
U.S. government and municipal obligations		29,817		0			0			29,817
Commercial paper		0		26,671			0			26,671
Corporate bonds		13,209		0			0			13,209
Certificate of deposits		0		5,522			0			5,522
Derivative financial instruments		0		313			0			313

	$	203,412	$	32,506		$	0		$	235,918

LIABILITIES:
Contingent consideration	$	0	$	0		$	(6,488	)	$	(6,488	)
Contingent contractual non-compliance liability		0		0			(565	)		(565	)
Derivative financial instruments		0		(22	)		0			(22	)

	$	0	$	(22	)	$	(7,053	)	$	(7,075	)


	Fair Value Measurements at March 31, 2012
	Level 1		Level 2			Level 3			Total
ASSETS:
Cash and cash equivalents	$	117,255	$	0		$	0		$	117,255
U.S. government and municipal obligations		31,635		0			0			31,635
Commercial paper		0		22,469			0			22,469
Corporate bonds		19,877		0			0			19,877
Certificate of deposits		0		3,207			0			3,207
Auction rate securities		0		17,612			1,461			19,073
Derivative financial instruments		0		150			0			150

	$	168,767	$	43,438		$	1,461		$	213,666

LIABILITIES:
Contingent consideration	$	0	$	0		$	(8,213	)	$	(8,213	)
Contingent contractual non-compliance liability		0		0			(700	)		(700	)
Derivative financial instruments		0		(166	)		0			(166	)

	$	0	$	(166	)	$	(8,913	)	$	(9,079	)

Reconciliation Of Changes In Fair Value Of Level III Financial Assets

The following table sets forth a reconciliation of changes in the fair value of the Company’s Level 3 financial assets for the six months ended September 30, 2012 (in thousands):


	Auction Rate Securities			Contingent Purchase Consideration			Contingent Contractual Non-compliance Liability
Balance at beginning of period	$	1,461		$	(8,213	)	$	(700	)
Change in fair value (included within research and development expense)		0			(631	)		135
ARSs redeemed by issuers		(1,650	)		0			0
Unrealized gains included in accumulated other comprehensive income (loss)		190			0			0
Unrealized gain (loss) included in earnings		(1	)		0			0
Payments		0			2,356			0

Balance at end of period	$	0		$	(6,488	)	$	(565	)

- Definition

Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability.

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