CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES (Tables)

6 Months Ended

Sep. 30, 2013

Investments, Debt and Equity Securities [Abstract]

Components Of Marketable Securities

The following is a summary of marketable securities held by NetScout at September 30, 2013 classified as short-term and long-term (in thousands):

	Amortized Cost		Unrealized Gains		Fair Value
Type of security:
U.S. government and municipal obligations	$	28,172	$	3	$	28,175
Commercial paper	5,597		0		5,597
Corporate bonds	5,658		5		5,663
Certificates of deposit	2,659		0		2,659
Total short-term marketable securities	42,086		8		42,094
U.S. government and municipal obligations	10,984		8		10,992
Corporate bonds	11,438		8		11,446
Total long-term marketable securities	22,422		16		22,438
Total marketable securities	$	64,508	$	24	$	64,532

The following is a summary of marketable securities held by NetScout at March 31, 2013, classified as short-term and long-term (in thousands):

	Amortized Cost		Unrealized Gains		Fair Value
Type of security:
U.S. government and municipal obligations	$	17,416	$	11	$	17,427
Commercial paper	12,390		0		12,390
Corporate bonds	2,559		2		2,561
Certificates of deposit	4,960		0		4,960
Total short-term marketable securities	37,325		13		37,338
U.S. government and municipal obligations	14,211		7		14,218
Corporate bonds	2,605		0		2,605
Total long-term marketable securities	16,816		7		16,823
Total marketable securities	$	54,141	$	20	$	54,161

Contractual Maturities Of Marketable Securities

Contractual maturities of the Company’s marketable securities held at September 30, 2013 and March 31, 2013 were as follows (in thousands):

	September 30, 2013		March 31, 2013
Available-for-sale securities:
Due in 1 year or less	$	42,094	$	37,338
Due after 1 year through 5 years	22,438		16,823
	$	64,532	$	54,161