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CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES (Tables)
 12 Months Ended
Mar. 31, 2022
Cash and Cash Equivalents [Abstract]  
Schedule of Cash and Cash Equivalents 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):
March 31, 2022March 31, 2021March 31, 2020March 31, 2019
Cash and cash equivalents$636,161 $467,176 $338,489 $409,632 
Restricted cash— — 1,748 188 
     Total cash, cash equivalents and restricted cash$636,161 $467,176 $340,237 $409,820 
Schedule of 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):
March 31, 2022March 31, 2021March 31, 2020March 31, 2019
Cash and cash equivalents$636,161 $467,176 $338,489 $409,632 
Restricted cash— — 1,748 188 
     Total cash, cash equivalents and restricted cash$636,161 $467,176 $340,237 $409,820 
Schedule of Marketable Securities
The following is a summary of marketable securities held by NetScout at March 31, 2022 classified as short-term and long-term (in thousands):
Amortized
Cost		Unrealized
Losses		Fair
Value
Type of security:
U.S. government and municipal obligations$40,895 $(32)$40,863 
Commercial paper23,353 — 23,353 
Corporate bonds823 (2)821 
Certificate of deposits2,000 — 2,000 
Total short-term marketable securities67,071 (34)67,037 
Total long-term marketable securities— — — 
Total marketable securities$67,071 $(34)$67,037 
 
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 
Schedule of Contractual Maturities of Marketable Securities Contractual maturities of the Company's marketable securities held at March 31, 2022 and 2021 (in thousands) were as follows:
March 31,
2022		March 31,
2021
Available-for-sale securities:
Due in 1 year or less$67,037 $9,277 
Due after 1 year through 5 years— — 
$67,037 $9,277