FAIR VALUE MEASUREMENTS (Tables)

9 Months Ended

Dec. 31, 2017

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, 2017 and March 31, 2017 (in thousands):



	Fair Value Measurements at
	December 31, 2017
	Level 1		Level 2			Level 3			Total
ASSETS:
Cash and cash equivalents	$	331,912	$	—		$	—		$	331,912
U.S. government and municipal obligations	17,010		28,060			—			45,070
Commercial paper	—		5,007			—			5,007
Corporate bonds	1,005		—			—			1,005
Derivative financial instruments	—		153			—			153
	$	349,927	$	33,220		$	—		$	383,147
LIABILITIES:
Contingent purchase consideration	$	—	$	—		$	(5,426	)	$	(5,426	)
Derivative financial instruments	—		(63		)	—			(63		)
	$	—	$	(63	)	$	(5,426	)	$	(5,489	)



	Fair Value Measurements at
	March 31, 2017
	Level 1		Level 2			Level 3			Total
ASSETS:
Cash and cash equivalents	$	304,880	$	—		$	—		$	304,880
U.S. government and municipal obligations	40,628		80,273			—			120,901
Commercial paper	—		29,469			—			29,469
Corporate bonds	7,956		—			—			7,956
Certificate of deposits	—		1,499			—			1,499
Derivative financial instruments	—		110			—			110
	$	353,464	$	111,351		$	—		$	464,815
LIABILITIES:
Contingent purchase consideration	$	—	$	—		$	(5,449	)	$	(5,449	)
Derivative financial instruments	—		(213		)	—			(213		)
	$	—	$	(213	)	$	(5,449	)	$	(5,662	)

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, 2017 (in thousands):



	Contingent Purchase Consideration
Balance at March 31, 2017	$	(5,449	)
Additions to Level 3	(523		)
Increase in fair value and accretion expense (included within research and development expense)	(114		)
Payments made	660
Balance at December 31, 2017	$	(5,426	)