CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES (Tables)

6 Months Ended

Sep. 30, 2015

Investments, Debt and Equity Securities [Abstract]

Summary of Marketable Securities

The following is a summary of marketable securities held by NetScout at September 30, 2015, classified as short-term and long-term (in thousands):

	Amortized Cost		Unrealized Gains		Fair Value
Type of security:
U.S. government and municipal obligations	$	93,507	$	25	$	93,532
Commercial paper	2,990		—		2,990
Corporate bonds	6,614		2		6,616
Total short-term marketable securities	103,111		27		103,138
U.S. government and municipal obligations	32,664		44		32,708
Total long-term marketable securities	32,664		44		32,708
Total marketable securities	$	135,775	$	71	$	135,846

The following is a summary of marketable securities held by NetScout at March 31, 2015, classified as short-term and long-term (in thousands):

	Amortized Cost		Unrealized Gains (Losses)			Fair Value
Type of security:
U.S. government and municipal obligations	$	88,651	$	3		$	88,654
Commercial paper	5,093		2			5,095
Corporate bonds	7,644		(1		)	7,643
Total short-term marketable securities	101,388		4			101,392
U.S. government and municipal obligations	56,683		8			56,691
Corporate bonds	1,880		1			1,881
Total long-term marketable securities	58,563		9			58,572
Total marketable securities	$	159,951	$	13		$	159,964

Summary of Contractual Maturities of Marketable Securities

Contractual maturities of the Company’s marketable securities held at September 30, 2015 and March 31, 2015 were as follows (in thousands):

	September 30, 2015		March 31, 2015
Available-for-sale securities:
Due in 1 year or less	$	103,138	$	101,392
Due after 1 year through 5 years	32,708		58,572
	$	135,846	$	159,964