FAIR VALUE MEASUREMENTS (Tables)

6 Months Ended

Sep. 30, 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 September 30, 2017 and March 31, 2017 (in thousands):



	Fair Value Measurements at
	September 30, 2017
	Level 1		Level 2			Level 3			Total
ASSETS:
Cash and cash equivalents	$	251,505	$	—		$	—		$	251,505
U.S. government and municipal obligations	21,794		25,094			—			46,888
Commercial paper	—		13,984			—			13,984
Corporate bonds	1,002		—			—			1,002
Derivative financial instruments	—		496			—			496
	$	274,301	$	39,574		$	—		$	313,875
LIABILITIES:
Contingent purchase consideration	$	—	$	—		$	(5,388	)	$	(5,388	)
Derivative financial instruments	—		(18		)	—			(18		)
	$	—	$	(18	)	$	(5,388	)	$	(5,406	)



	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 six months ended September 30, 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)	(76		)
Payments made	660
Balance at September 30, 2017	$	(5,388	)