FAIR VALUE MEASUREMENTS (Tables)

9 Months Ended

Dec. 31, 2015

Fair Value Disclosures [Abstract]

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 at December 31, 2015 and March 31, 2015 (in thousands):

	Fair Value Measurements at
	December 31, 2015
	Level 1		Level 2			Level 3			Total
ASSETS:
Cash and cash equivalents	$	230,521	$	—		$	—		$	230,521
U.S. government and municipal obligations	39,040		89,818			—			128,858
Commercial paper	—		12,970			—			12,970
Corporate bonds	3,885		—			—			3,885
Derivative financial instruments	—		9			—			9
Contingently returnable consideration	$	—	$	—		$	16,687		$	16,687
	$	273,446	$	102,797		$	16,687		$	392,930
LIABILITIES:
Contingent purchase consideration	$	—	$	—		$	(7,234	)	$	(7,234	)
Derivative financial instruments	—		(467		)	—			(467		)
	$	—	$	(467	)	$	(7,234	)	$	(7,701	)

	Fair Value Measurements at
	March 31, 2015
	Level 1		Level 2			Level 3			Total
ASSETS:
Cash and cash equivalents	$	104,893	$	—		$	—		$	104,893
U.S. government and municipal obligations	46,564		98,781			—			145,345
Commercial paper	—		5,095			—			5,095
Corporate bonds	9,524		—			—			9,524
Derivative financial instruments	—		15			—			15
	$	160,981	$	103,891		$	—		$	264,872
LIABILITIES:
Contingent purchase consideration	$	—	$	—		$	(4,484	)	$	(4,484	)
Derivative financial instruments	—		(1,664		)	—			(1,664		)
	$	—	$	(1,664	)	$	(4,484	)	$	(6,148	)

Schedule of 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 and liabilities for the nine months ended December 31, 2015 (in thousands):

	Contingent Purchase Consideration			Contingently Returnable Consideration
Balance at beginning of period	$	(4,484	)	$	—
Increase in fair value and accretion expense (included within research and development expense)	(114		)
Contingently returnable consideration				19,125
Increase in fair value				3,676
Gross presentation of contingently returnable consideration to contingent purchase consideration	(2,636		)	2,636
Payment received				(8,750		)
Balance at end of period	$	(7,234	)	$	16,687