CASH, CASH EQUIVALENTS, RESTRICTED CASH AND MARKETABLE SECURITIES

6 Months Ended

Sep. 30, 2018

Investments, Debt and Equity Securities [Abstract]

CASH, CASH EQUIVALENTS, RESTRICTED CASH 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 September 30, 2018 and March 31, 2018.

Cash, Cash Equivalents and Restricted Cash

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the total of the same such amounts shown in the consolidated statements of cash flows (in thousands):



	September 30, 2018		March 31, 2018		September 30, 2017		March 31, 2017
Cash and cash equivalents	$	332,183	$	369,821	$	251,505	$	304,880
Restricted cash	187		910		909		846
Total cash, cash equivalents and restricted cash	$	332,370	$	370,731	$	252,414	$	305,726

The Company's restricted cash includes cash balances which are legally or contractually restricted. The Company's restricted cash is included within prepaid and other current assets and consists of amounts related to holdbacks associated with prior acquisitions.

Marketable Securities

The following is a summary of marketable securities held by NetScout at September 30, 2018, classified as short-term and long-term (in thousands):



	Amortized Cost		Unrealized Losses			Fair Value
Type of security:
U.S. government and municipal obligations	$	62,502	$	(29	)	$	62,473
Commercial paper	54,701		—			54,701
Corporate bonds	2,762		(1		)	2,761
Total short-term marketable securities	119,965		(30		)	119,935
Total long-term marketable securities	—		—			—
Total marketable securities	$	119,965	$	(30	)	$	119,935

The following is a summary of marketable securities held by NetScout at March 31, 2018, classified as short-term and long-term (in thousands):



	Amortized Cost		Unrealized Losses			Fair Value
Type of security:
U.S. government and municipal obligations	$	42,246	$	(60	)	$	42,186
Commercial paper	33,003		—			33,003
Corporate bonds	2,754		(2		)	2,752
Total short-term marketable securities	78,003		(62		)	77,941
Total long-term marketable securities	—		—			—
Total marketable securities	$	78,003	$	(62	)	$	77,941

Contractual maturities of the Company's marketable securities held at September 30, 2018 and March 31, 2018 were as follows (in thousands):



	September 30, 2018		March 31, 2018
Available-for-sale securities:
Due in 1 year or less	$	119,935	$	77,941
	$	119,935	$	77,941