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CASH, CASH EQUIVALENTS, RESTRICTED CASH AND MARKETABLE SECURITIES
 6 Months Ended
Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]  
CASH, CASH EQUIVALENTS, RESTRICTED CASH AND MARKETABLE SECURITIES 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 mainly consisted of U.S. government and municipal obligations, commercial paper, money market instruments and cash maintained with various financial institutions at September 30, 2021 and March 31, 2021.
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,
2021		March, 31, 2021September 30,
2020		March 31,
2020
Cash and cash equivalents$468,470 $467,176 $415,719 $338,489 
Restricted cash— — 748 1,748 
     Total cash, cash equivalents and restricted cash$468,470 $467,176 $416,467 $340,237 
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, 2021, classified as short-term and long-term (in thousands):
Amortized
Cost		Unrealized
Gains		Fair
Value
Type of security:
Commercial paper$7,347 — $7,347 
Total short-term marketable securities7,347 — 7,347 
Total long-term marketable securities— — — 
Total marketable securities$7,347 $— $7,347 
The following is a summary of marketable securities held by NetScout at March 31, 2021, classified as short-term and long-term (in thousands):
Amortized
Cost		Unrealized
Gains		Fair
Value
Type of security:
U.S. government and municipal obligations$3,571 $7 $3,578 
Commercial paper5,699 — 5,699 
Total short-term marketable securities9,270 7 9,277 
Total long-term marketable securities— — — 
Total marketable securities$9,270 $7 $9,277 
Contractual maturities of the Company's marketable securities held at September 30, 2021 and March 31, 2021 were as follows (in thousands):
September 30,
2021		March 31,
2021
Available-for-sale securities:
Due in 1 year or less$7,347 $9,277 
Due after 1 year through 5 years— — 
$7,347 $9,277