FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Mar. 31, 2016

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 March 31, 2016 and 2015 (in thousands).

	Fair Value Measurements at
	March 31, 2016
	Level 1		Level 2			Level 3			Total
ASSETS:
Cash and cash equivalents	$	210,711	$	—		$	—		$	210,711
U.S. government and municipal obligations	41,116		82,212			—			123,328
Commercial paper	—		16,172			—			16,172
Corporate bonds	1,864		—			—			1,864
Derivative financial instruments	—		191			—			191
Contingently returnable consideration	—					16,131			16,131
	$	253,691	$	98,575		$	16,131		$	368,397
LIABILITIES:
Contingent consideration	$	—	$	—		$	(7,293	)	$	(7,293	)
Derivative financial instruments	—		(158		)	—			(158		)
	$	—	$	(158	)	$	(7,293	)	$	(7,451	)

	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 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 Three Financial Liabilities

The following table sets forth a reconciliation of changes in the fair value of the Company’s Level 3 financial liabilities for the year ended March 31, 2016 (in thousands):

	Contingent Purchase Consideration			Contingently Returnable Consideration
Balance at March 31, 2015	$	(4,484	)	$	—
(Increase) / decrease in fair value and accretion expense (included within research and development expense)	(152		)	—
Contingently returnable consideration	—			19,125
Increase in fair value	(21		)	3,676
Gross presentation of contingently returnable consideration to contingent purchase consideration	(2,636		)	2,636
Payments received	—			(9,306		)
Balance at March 31, 2016	$	(7,293	)	$	16,131

The following table sets forth a reconciliation of changes in the fair value of the Company’s Level 3 financial liabilities for the year ended March 31, 2015 (in thousands):

	Contingent Purchase Consideration			Contingent Contractual Non-compliance Liability
Balance at March 31, 2014	$	(4,291	)	$	(49	)
(Increase) / decrease in fair value and accretion expense (included within research and development expense)	(193		)	49
Balance at March 31, 2015	$	(4,484	)	$	0