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CASH, CASH EQUIVALENTS, RESTRICTED CASH AND MARKETABLE SECURITIES (Tables)
 3 Months Ended
Jun. 30, 2020
Investments, Debt and Equity Securities [Abstract]  
Schedule of Cash, 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):
June 30,
2020		March 31, 2020June 30,
2019		March 31,
2019
Cash and cash equivalents$403,306  $338,489  $353,721  $409,632  
Restricted cash748  1,748  1,189  188  
     Total cash, cash equivalents and restricted cash$404,054  $340,237  $354,910  $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):
June 30,
2020		March 31, 2020June 30,
2019		March 31,
2019
Cash and cash equivalents$403,306  $338,489  $353,721  $409,632  
Restricted cash748  1,748  1,189  188  
     Total cash, cash equivalents and restricted cash$404,054  $340,237  $354,910  $409,820  
Summary of Marketable Securities
The following is a summary of marketable securities held by NetScout at June 30, 2020, classified as short-term and long-term (in thousands):
Amortized
Cost		Unrealized
Gains		Fair
Value
Type of security:
U.S. government and municipal obligations$10,570  $70  $10,640  
Commercial paper10,626  —  10,626  
Corporate bonds1,921  15  1,936  
Total short-term marketable securities23,117  85  23,202  
Total long-term marketable securities—  —  —  
Total marketable securities$23,117  $85  $23,202  
The following is a summary of marketable securities held by NetScout at March 31, 2020, classified as short-term and long-term (in thousands):
Amortized
Cost		Unrealized
Gains		Fair
Value
Type of security:
U.S. government and municipal obligations$28,621  $107  $28,728  
Commercial paper14,644  —  14,644  
Corporate bonds4,587  10  4,597  
Total short-term marketable securities47,852  117  47,969  
U.S. government and municipal obligations2,562  51  2,613  
Total long-term marketable securities2,562  51  2,613  
Total marketable securities$50,414  $168  $50,582  
Summary of Contractual Maturities of Marketable Securities
Contractual maturities of the Company's marketable securities held at June 30, 2020 and March 31, 2020 were as follows (in thousands):
June 30,
2020		March 31,
2020
Available-for-sale securities:
Due in 1 year or less$23,202  $47,969  
Due after 1 year through 5 years—  2,613  
$23,202  $50,582