CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES

9 Months Ended

Dec. 31, 2015

Investments, Debt and Equity Securities [Abstract]

CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES

CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES

The Company considers all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents and those investments with original maturities greater than three months to be marketable securities. Cash and cash equivalents consisted of money market instruments and cash maintained with various financial institutions at December 31, 2015 and March 31, 2015.

Marketable Securities

The following is a summary of marketable securities held by NetScout at December 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	$	110,917	$	(21	)	$	110,896
Commercial paper	12,970		—			12,970
Corporate bonds	3,886		(1		)	3,885
Total short-term marketable securities	127,773		(22		)	127,751
U.S. government and municipal obligations	17,993		(32		)	17,961
Total long-term marketable securities	17,993		(32		)	17,961
Total marketable securities	$	145,766	$	(54	)	$	145,712

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

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

	December 31, 2015		March 31, 2015
Available-for-sale securities:
Due in 1 year or less	$	127,751	$	101,392
Due after 1 year through 5 years	17,961		58,572
	$	145,712	$	159,964