FAIR VALUE MEASUREMENTS (Tables)

6 Months Ended

Sep. 30, 2018

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 September 30, 2018 and March 31, 2018 (in thousands):

	Fair Value Measurements at
	September 30, 2018
	Level 1		Level 2			Level 3			Total
ASSETS:
Cash and cash equivalents	$	332,183	$	—		$	—		$	332,183
U.S. government and municipal obligations	43,406		19,067			—			62,473
Commercial paper	—		54,701			—			54,701
Corporate bonds	2,761		—			—			2,761
Derivative financial instruments	—		16			—			16
Contingent consideration	—		—			2,267			2,267
	$	378,350	$	73,784		$	2,267		$	454,401
LIABILITIES:
Contingent purchase consideration	$	—	$	—		$	(5,017	)	$	(5,017	)
Derivative financial instruments	—		(220		)	—			(220		)
	$	—	$	(220	)	$	(5,017	)	$	(5,237	)

	Fair Value Measurements at
	March 31, 2018
	Level 1		Level 2			Level 3			Total
ASSETS:
Cash and cash equivalents	$	369,821	$	—		$	—		$	369,821
U.S. government and municipal obligations	14,513		27,673			—			42,186
Commercial paper	—		33,003			—			33,003
Corporate bonds	2,752		—			—			2,752
Derivative financial instruments	—		122			—			122
	$	387,086	$	60,798		$	—		$	447,884
LIABILITIES:
Contingent purchase consideration	$	—	$	—		$	(5,464	)	$	(5,464	)
Derivative financial instruments	—		(40		)	—			(40		)
	$	—	$	(40	)	$	(5,464	)	$	(5,504	)

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, 2018 (in thousands):

	Contingent Purchase Consideration			Contingent Consideration
Balance at March 31, 2018	$	(5,464	)	$	—
Contingent consideration pursuant to divestiture of HNT tools business	—			2,257
Change in fair value of contingent consideration	(76		)	10
Payments of contingent consideration	523			—
Balance at September 30, 2018	$	(5,017	)	$	2,267