$NTCT
NETSCOUT SYSTEMS INC Stock $ntct

$ntct Overview Financials Valuation SEC Filings Company Website

2021 Q1 Form 10-Q Financial Statement

#000162828021001478 Filed on February 04, 2021

Income Statement

Concept	2021 Q1	2020 Q4	2019 Q4
Revenue	$213.4M	$228.7M	$260.0M
YoY Change	-6.95%	-12.03%	5.7%
Cost Of Revenue	$54.90M	$55.28M	$65.59M
YoY Change	-12.44%	-15.72%	-5.75%
Gross Profit	$158.4M	$173.5M	$194.4M
YoY Change	-4.93%	-10.79%	10.21%
Gross Profit Margin	74.23%	75.83%	74.78%
Selling, General & Admin	$83.60M	$82.65M	$92.70M
YoY Change	-6.9%	-10.84%	-4.25%
% of Gross Profit	52.78%	47.65%	47.68%
Research & Development	$43.60M	$43.77M	$48.61M
YoY Change	-5.01%	-9.95%	-2.64%
% of Gross Profit	27.53%	25.23%	25.0%
Depreciation & Amortization	$26.20M	$26.40M	$28.70M
YoY Change	-8.71%	-8.01%	-10.03%
% of Gross Profit	16.54%	15.22%	14.76%
Operating Expenses	$142.4M	$141.7M	$157.6M
YoY Change	-6.25%	-10.1%	-10.98%
Operating Profit	$16.00M	$31.77M	$36.82M
YoY Change	8.7%	-13.71%	-5843.99%
Interest Expense	-$2.200M	$2.708M	$4.629M
YoY Change	-38.89%	-41.5%	-33.92%
% of Operating Profit	-13.75%	8.52%	12.57%
Other Income/Expense, Net	-$800.0K	-$3.583M	-$3.915M
YoY Change	300.0%	-8.48%	-14.22%
Pretax Income	$13.00M	$28.19M	$32.90M
YoY Change	47.73%	-14.34%	-732.16%
Income Tax	$1.600M	-$834.0K	-$3.821M
% Of Pretax Income	12.31%	-2.96%	-11.61%
Net Earnings	$11.40M	$29.02M	$36.73M
YoY Change	55.4%	-20.98%	-1119.29%
Net Earnings / Revenue	5.34%	12.69%	14.12%
Basic Earnings Per Share		$0.39	$0.49
Diluted Earnings Per Share	$153.2K	$0.39	$0.49
COMMON SHARES
Basic Shares Outstanding	73.44M shares	73.49M shares	74.37M shares
Diluted Shares Outstanding		73.88M shares	74.70M shares

Balance Sheet

Concept	2021 Q1	2020 Q4	2019 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$476.5M	$490.4M	$343.9M
YoY Change	23.29%	42.6%	-27.57%
Cash & Equivalents	$467.2M	$477.8M	$287.7M
Short-Term Investments	$9.300M	$12.70M	$56.30M
Other Short-Term Assets	$27.00M	$33.50M	$31.20M
YoY Change	9.31%	7.37%	-1.58%
Inventory	$22.81M	$26.04M	$24.98M
Prepaid Expenses
Receivables	$197.7M	$208.0M	$244.9M
Other Receivables	$1.900M	$9.600M	$14.40M
Total Short-Term Assets	$722.5M	$762.6M	$654.0M
YoY Change	9.51%	16.6%	-18.47%
LONG-TERM ASSETS
Property, Plant & Equipment	$48.47M	$51.27M	$58.70M
YoY Change	-16.01%	-12.67%	-3.44%
Goodwill	$1.718B	$1.714B	$1.718B
YoY Change	-0.47%	-0.26%	0.17%
Intangibles	$511.9M	$535.1M	$602.9M
YoY Change	-12.07%	-11.25%	-13.1%
Long-Term Investments	$0.00	$0.00	$2.600M
YoY Change	-100.0%	-100.0%	160.0%
Other Assets	$15.06M	$13.00M	$17.91M
YoY Change	-15.23%	-27.39%	-7.22%
Total Long-Term Assets	$2.363B	$2.384B	$2.473B
YoY Change	-3.99%	-3.62%	-0.88%
TOTAL ASSETS
Total Short-Term Assets	$722.5M	$762.6M	$654.0M
Total Long-Term Assets	$2.363B	$2.384B	$2.473B
Total Assets	$3.085B	$3.146B	$3.127B
YoY Change	-1.14%	0.61%	-5.16%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$17.96M	$19.22M	$19.76M
YoY Change	-10.2%	-2.72%	-32.88%
Accrued Expenses	$116.5M	$125.5M	$101.7M
YoY Change	8.07%	23.4%	6.38%
Deferred Revenue	$269.7M	$251.3M	$261.2M
YoY Change	-0.2%	-3.77%	0.09%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$411.3M	$396.2M	$384.1M
YoY Change	3.08%	3.15%	-0.59%
LONG-TERM LIABILITIES
Long-Term Debt	$350.0M	$450.0M	$450.0M
YoY Change	-22.22%	0.0%	-25.0%
Other Long-Term Liabilities	$21.64M	$11.57M	$6.997M
YoY Change	115.57%	65.33%	-65.11%
Total Long-Term Liabilities	$371.6M	$461.6M	$457.0M
YoY Change	-19.22%	1.0%	-26.3%
TOTAL LIABILITIES
Total Short-Term Liabilities	$411.3M	$396.2M	$384.1M
Total Long-Term Liabilities	$371.6M	$461.6M	$457.0M
Total Liabilities	$1.079B	$1.168B	$1.165B
YoY Change	-8.74%	0.31%	-7.13%
SHAREHOLDERS EQUITY
Retained Earnings	$374.7M	$363.3M	$348.0M
YoY Change	5.45%	4.38%	2.93%
Common Stock	$124.0K	$124.0K	$122.0K
YoY Change	1.64%	1.64%	2.52%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$1.322B	$1.322B	$1.256B
YoY Change	1.27%	5.28%	13.73%
Treasury Stock Shares	50.45M shares	50.43M shares	47.82M shares
Shareholders Equity	$2.006B	$1.978B	$1.963B
YoY Change
Total Liabilities & Shareholders Equity	$3.085B	$3.146B	$3.127B
YoY Change	-1.14%	0.61%	-5.16%

Cashflow Statement

Concept	2021 Q1	2020 Q4	2019 Q4
OPERATING ACTIVITIES
Net Income	$11.40M	$29.02M	$36.73M
YoY Change	55.4%	-20.98%	-1119.29%
Depreciation, Depletion And Amortization	$26.20M	$26.40M	$28.70M
YoY Change	-8.71%	-8.01%	-10.03%
Cash From Operating Activities	$92.00M	$65.30M	$69.30M
YoY Change	-14.18%	-5.77%	88.32%
INVESTING ACTIVITIES
Capital Expenditures	-$2.900M	-$3.300M	-$6.100M
YoY Change	-38.3%	-45.9%	-17.57%
Acquisitions
YoY Change
Other Investing Activities	$3.400M	-$600.0K	$3.900M
YoY Change	183.33%	-115.38%	-70.45%
Cash From Investing Activities	$500.0K	-$3.900M	-$2.200M
YoY Change	-114.29%	77.27%	-137.93%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-101.3M	-3.400M	-25.20M
YoY Change	101.39%	-86.51%	546.15%
NET CHANGE
Cash From Operating Activities	92.00M	65.30M	69.30M
Cash From Investing Activities	500.0K	-3.900M	-2.200M
Cash From Financing Activities	-101.3M	-3.400M	-25.20M
Net Change In Cash	-8.800M	58.00M	41.90M
YoY Change	-116.48%	38.42%	8.27%
FREE CASH FLOW
Cash From Operating Activities	$92.00M	$65.30M	$69.30M
Capital Expenditures	-$2.900M	-$3.300M	-$6.100M
Free Cash Flow	$94.90M	$68.60M	$75.40M
YoY Change	-15.19%	-9.02%	70.59%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	478503000	USD
	dei	Local Phone Number LocalPhoneNumber	614-4000
	dei	Entity Central Index Key EntityCentralIndexKey	0001078075
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--03-31
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Amendment Flag AmendmentFlag	false
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	000-26251
	dei	Entity Registrant Name EntityRegistrantName	NETSCOUT SYSTEMS, INC.
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	04-2837575
	dei	Entity Address Address Line1 EntityAddressAddressLine1	310 Littleton Road
	dei	Entity Address City Or Town EntityAddressCityOrTown	Westford
	dei	Entity Address State Or Province EntityAddressStateOrProvince	MA
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	01886
CY2020Q1	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	213514000	USD
	dei	City Area Code CityAreaCode	978
	dei	Security12b Title Security12bTitle	Common Stock, $0.001 par value per share
	dei	Trading Symbol TradingSymbol	NTCT
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
CY2021Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	73438763	shares
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	477755000	USD
CY2020Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	338489000	USD
CY2020Q4	us-gaap	Marketable Securities Current MarketableSecuritiesCurrent	12689000	USD
CY2020Q1	us-gaap	Marketable Securities Current MarketableSecuritiesCurrent	47969000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	719000	USD
CY2020Q1	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1350000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	208016000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	26040000	USD
CY2020Q1	us-gaap	Inventory Net InventoryNet	22227000	USD
CY2020Q4	us-gaap	Prepaid Taxes PrepaidTaxes	9566000	USD
CY2020Q1	us-gaap	Prepaid Taxes PrepaidTaxes	13505000	USD
CY2020Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	28548000	USD
CY2020Q1	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	24039000	USD
CY2020Q4	us-gaap	Assets Current AssetsCurrent	762614000	USD
CY2020Q1	us-gaap	Assets Current AssetsCurrent	659743000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	51265000	USD
CY2020Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	57715000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	63257000	USD
CY2020Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	68583000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	1714109000	USD
CY2020Q1	us-gaap	Goodwill Goodwill	1725680000	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	535095000	USD
CY2020Q1	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	582179000	USD
CY2020Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	6982000	USD
CY2020Q1	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	6220000	USD
CY2020Q4	us-gaap	Marketable Securities Noncurrent MarketableSecuritiesNoncurrent	0	USD
CY2020Q1	us-gaap	Marketable Securities Noncurrent MarketableSecuritiesNoncurrent	2613000	USD
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	13001000	USD
CY2020Q1	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	17770000	USD
CY2020Q4	us-gaap	Assets Assets	3146323000	USD
CY2020Q1	us-gaap	Assets Assets	3120503000	USD
CY2020Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	19219000	USD
CY2020Q1	us-gaap	Accounts Payable Current AccountsPayableCurrent	20004000	USD
CY2020Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	76900000	USD
CY2020Q1	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	75632000	USD
CY2020Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	36801000	USD
CY2020Q1	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	21840000	USD
CY2020Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	233000	USD
CY2020Q1	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	903000	USD
CY2020Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	251313000	USD
CY2020Q1	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	270281000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	11753000	USD
CY2020Q1	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	10337000	USD
CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	396219000	USD
CY2020Q1	us-gaap	Liabilities Current LiabilitiesCurrent	398997000	USD
CY2020Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	11568000	USD
CY2020Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	10039000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	105510000	USD
CY2020Q1	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	114394000	USD
CY2020Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	38264000	USD
CY2020Q1	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	34256000	USD
CY2020Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	102713000	USD
CY2020Q1	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	104240000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	63814000	USD
CY2020Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	70658000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	450000000	USD
CY2020Q1	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	450000000	USD
CY2020Q4	us-gaap	Liabilities Liabilities	1168088000	USD
CY2020Q1	us-gaap	Liabilities Liabilities	1182584000	USD
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q1	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q1	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2020Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2020Q1	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2020Q1	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2020Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2020Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2020Q1	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2020Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2020Q1	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2020Q1	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2020Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	300000000	shares
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	300000000	shares
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	123867373	shares
CY2020Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	122006077	shares
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	73438024	shares
CY2020Q1	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	72220906	shares
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	124000	USD
CY2020Q1	us-gaap	Common Stock Value CommonStockValue	122000	USD
CY2020Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	2936573000	USD
CY2020Q1	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	2891553000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	262000	USD
CY2020Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-3160000	USD
CY2020Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	50429349	shares
CY2020Q1	us-gaap	Treasury Stock Shares TreasuryStockShares	49785171	shares
CY2020Q4	us-gaap	Treasury Stock Value TreasuryStockValue	1321978000	USD
CY2020Q1	us-gaap	Treasury Stock Value TreasuryStockValue	1305935000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	363254000	USD
CY2020Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	355339000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	1978235000	USD
CY2020Q1	us-gaap	Stockholders Equity StockholdersEquity	1937919000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	3146323000	USD
CY2020Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	3120503000	USD
CY2020Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	228739000	USD
CY2019Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	260024000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	617893000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	662469000	USD
CY2020Q4	us-gaap	Cost Of Revenue CostOfRevenue	55275000	USD
CY2019Q4	us-gaap	Cost Of Revenue CostOfRevenue	65585000	USD
	us-gaap	Cost Of Revenue CostOfRevenue	167155000	USD
	us-gaap	Cost Of Revenue CostOfRevenue	179460000	USD
CY2020Q4	us-gaap	Gross Profit GrossProfit	173464000	USD
CY2019Q4	us-gaap	Gross Profit GrossProfit	194439000	USD
	us-gaap	Gross Profit GrossProfit	450738000	USD
	us-gaap	Gross Profit GrossProfit	483009000	USD
CY2020Q4	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	43769000	USD
CY2019Q4	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	48606000	USD
	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	135605000	USD
	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	142391000	USD
CY2020Q4	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	60934000	USD
CY2019Q4	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	67653000	USD
	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	180668000	USD
	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	214245000	USD
CY2020Q4	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	21718000	USD
CY2019Q4	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	25048000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	67444000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	72436000	USD
CY2020Q4	ntct	Amortizationof Acquired Intangible Assets AmortizationofAcquiredIntangibleAssets	15273000	USD
CY2019Q4	ntct	Amortizationof Acquired Intangible Assets AmortizationofAcquiredIntangibleAssets	16120000	USD
	ntct	Amortizationof Acquired Intangible Assets AmortizationofAcquiredIntangibleAssets	45897000	USD
	ntct	Amortizationof Acquired Intangible Assets AmortizationofAcquiredIntangibleAssets	48395000	USD
CY2020Q4	us-gaap	Restructuring Charges RestructuringCharges	0	USD
CY2019Q4	us-gaap	Restructuring Charges RestructuringCharges	193000	USD
	us-gaap	Restructuring Charges RestructuringCharges	62000	USD
	us-gaap	Restructuring Charges RestructuringCharges	466000	USD
CY2020Q4	us-gaap	Operating Expenses OperatingExpenses	141694000	USD
CY2019Q4	us-gaap	Operating Expenses OperatingExpenses	157620000	USD
	us-gaap	Operating Expenses OperatingExpenses	429676000	USD
	us-gaap	Operating Expenses OperatingExpenses	477933000	USD
CY2020Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	31770000	USD
CY2019Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	36819000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	21062000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	5076000	USD
CY2020Q4	us-gaap	Investment Income Interest InvestmentIncomeInterest	73000	USD
CY2019Q4	us-gaap	Investment Income Interest InvestmentIncomeInterest	826000	USD
	us-gaap	Investment Income Interest InvestmentIncomeInterest	510000	USD
	us-gaap	Investment Income Interest InvestmentIncomeInterest	3699000	USD
CY2020Q4	us-gaap	Interest Expense InterestExpense	2708000	USD
CY2019Q4	us-gaap	Interest Expense InterestExpense	4629000	USD
	us-gaap	Interest Expense InterestExpense	8497000	USD
	us-gaap	Interest Expense InterestExpense	16167000	USD
CY2020Q4	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-948000	USD
CY2019Q4	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-112000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-3770000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	538000	USD
CY2020Q4	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-3583000	USD
CY2019Q4	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-3915000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-11757000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-11930000	USD
CY2020Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	28187000	USD
CY2019Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	32904000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	9305000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-6854000	USD
CY2020Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-834000	USD
CY2019Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3821000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1390000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3236000	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	29021000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	36725000	USD
	us-gaap	Net Income Loss NetIncomeLoss	7915000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-10090000	USD
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.39
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.49
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.11
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.13
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.39
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.49
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.11
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.13
CY2020Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	73492000	shares
CY2019Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	74367000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	72953000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	75780000	shares
CY2020Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	73878000	shares
CY2019Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	74700000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	73618000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	75780000	shares
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	29021000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	36725000	USD
	us-gaap	Net Income Loss NetIncomeLoss	7915000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-10090000	USD
CY2020Q4	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	1482000	USD
CY2019Q4	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	297000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	3375000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-789000	USD
CY2020Q4	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-5000	USD
CY2019Q4	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	1000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-38000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	12000	USD
CY2020Q4	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-15000	USD
CY2019Q4	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	3000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-122000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	40000	USD
CY2020Q4	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-15000	USD
CY2019Q4	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	3000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-122000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	40000	USD
CY2020Q4	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	40000	USD
CY2019Q4	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	40000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	101000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	6000	USD
CY2020Q4	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	132000	USD
CY2019Q4	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	84000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	319000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	18000	USD
CY2020Q4	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	-24000	USD
CY2019Q4	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	-7000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	-47000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	8000	USD
CY2020Q4	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	79000	USD
CY2019Q4	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	30000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	150000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-25000	USD
CY2020Q4	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	53000	USD
CY2019Q4	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	54000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	169000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	43000	USD
CY2020Q4	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1520000	USD
CY2019Q4	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	354000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	3422000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-706000	USD
CY2020Q4	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	30541000	USD
CY2019Q4	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	37079000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	11337000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-10796000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	1939320000	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	29021000	USD
CY2020Q4	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-15000	USD
CY2020Q4	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	53000	USD
CY2020Q4	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	1482000	USD
CY2020Q4	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	1000	USD
CY2020Q4	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	11816000	USD
CY2020Q4	us-gaap	Treasury Stock Value Acquired Par Value Method TreasuryStockValueAcquiredParValueMethod	3443000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	1978235000	USD
CY2020Q1	us-gaap	Stockholders Equity StockholdersEquity	1937919000	USD
	us-gaap	Net Income Loss NetIncomeLoss	7915000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-122000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	169000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	3375000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	2000	USD
	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	38545000	USD
	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	6475000	USD
	us-gaap	Treasury Stock Value Acquired Par Value Method TreasuryStockValueAcquiredParValueMethod	16043000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	1978235000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	1940264000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	36725000	USD
CY2019Q4	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	3000	USD
CY2019Q4	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	54000	USD
CY2019Q4	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	297000	USD
CY2019Q4	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	0	USD
CY2019Q4	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	10699000	USD
CY2019Q4	us-gaap	Treasury Stock Value Acquired Par Value Method TreasuryStockValueAcquiredParValueMethod	25235000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	1962807000	USD
CY2019Q1	us-gaap	Stockholders Equity StockholdersEquity	2065433000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-10090000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	40000	USD
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	43000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-789000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	2000	USD
	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	38187000	USD
	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	6593000	USD
	us-gaap	Treasury Stock Value Acquired Par Value Method TreasuryStockValueAcquiredParValueMethod	136612000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	1962807000	USD
	us-gaap	Net Income Loss NetIncomeLoss	7915000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-10090000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	79638000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	87397000	USD
	ntct	Increase Decrease In Operating Lease Right Of Use Asset IncreaseDecreaseInOperatingLeaseRightOfUseAsset	7820000	USD
	ntct	Increase Decrease In Operating Lease Right Of Use Asset IncreaseDecreaseInOperatingLeaseRightOfUseAsset	7872000	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-37000	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-16000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	40349000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	39961000	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	0	USD
	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	541000	USD
	ntct	Accretion Of Contingent Consideration AccretionOfContingentConsideration	0	USD
	ntct	Accretion Of Contingent Consideration AccretionOfContingentConsideration	24000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-10438000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-8480000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	1000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-35000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-6722000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	9554000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	5083000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	1233000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-2321000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-10957000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-589000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-4647000	USD
	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	22694000	USD
	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	16009000	USD
	ntct	Increase Decrease In Operating Lease Liabilities IncreaseDecreaseInOperatingLeaseLiabilities	7923000	USD
	ntct	Increase Decrease In Operating Lease Liabilities IncreaseDecreaseInOperatingLeaseLiabilities	9690000	USD
	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	190000	USD
	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	24000	USD
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-21749000	USD
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-1304000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	121903000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	117790000	USD
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	13974000	USD
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	89840000	USD
	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	51706000	USD
	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	108413000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	9110000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	15207000	USD
	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	4537000	USD
	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	0	USD
	us-gaap	Proceeds From Other Deposits ProceedsFromOtherDeposits	105000	USD
	us-gaap	Payments For Other Deposits PaymentsForOtherDeposits	29000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	4154000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	24190000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-817000	USD
	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	2000	USD
	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	2000	USD
	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	1000000	USD
	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	0	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	100000000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3275000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	125000000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	12768000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	11612000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-17041000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-236610000	USD
	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	9214000	USD
	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-1523000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	138266000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-121160000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	340237000	USD
CY2019Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	409820000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	288660000	USD
	us-gaap	Interest Paid Net InterestPaidNet	6103000	USD
	us-gaap	Interest Paid Net InterestPaidNet	14019000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	8532000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	10494000	USD
	ntct	Transfers From Inventory To Fixed Assets TransfersFromInventoryToFixedAssets	1530000	USD
	ntct	Transfers From Inventory To Fixed Assets TransfersFromInventoryToFixedAssets	2290000	USD
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	231000	USD
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	119000	USD
	us-gaap	Stock Issued1 StockIssued1	6475000	USD
	us-gaap	Stock Issued1 StockIssued1	6593000	USD
	ntct	Business Combination Contingent Consideration Includedin Accrued Other BusinessCombinationContingentConsiderationIncludedinAccruedOther	0	USD
	ntct	Business Combination Contingent Consideration Includedin Accrued Other BusinessCombinationContingentConsiderationIncludedinAccruedOther	1000000	USD
CY2020Q4	ntct	Social Security Tax Employer Deferral Cares Act SocialSecurityTaxEmployerDeferralCARESAct	8900000	USD
	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	228900000	USD
CY2020Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	354000000.0	USD
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	251300000	USD
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation Percentage RevenueRemainingPerformanceObligationPercentage	0.71
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P12M
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	102700000	USD
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation Percentage RevenueRemainingPerformanceObligationPercentage	0.29
CY2020Q4	ntct	Unrecognized Accounts Receivable And Deferred Revenue UnrecognizedAccountsReceivableAndDeferredRevenue	5400000	USD
CY2020Q1	ntct	Unrecognized Accounts Receivable And Deferred Revenue UnrecognizedAccountsReceivableAndDeferredRevenue	11100000	USD
CY2020Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	7500000	USD
CY2020Q1	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	7200000	USD
CY2020Q4	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	1600000	USD
CY2019Q4	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	1600000	USD
	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	4700000	USD
	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	4800000	USD
CY2020Q1	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1350000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	50000	USD
	us-gaap	Allowance For Doubtful Accounts Receivable Recoveries AllowanceForDoubtfulAccountsReceivableRecoveries	621000	USD
	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	60000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	719000	USD
CY2020Q4	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	12517000	USD
CY2019Q4	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	11361000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	40349000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	39961000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	477755000	USD
CY2020Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	338489000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	287660000	USD
CY2019Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	409632000	USD
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	748000	USD
CY2020Q1	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	1748000	USD
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	1000000	USD
CY2019Q1	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	188000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	478503000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	340237000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	288660000	USD
CY2019Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	409820000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	12671000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Accumulated Gross Unrealized Gain Loss Before Tax DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax	18000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	12689000	USD
CY2020Q1	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	50414000	USD
CY2020Q1	us-gaap	Debt Securities Available For Sale Accumulated Gross Unrealized Gain Loss Before Tax DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax	168000	USD
CY2020Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	50582000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	12689000	USD
CY2020Q1	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	47969000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	0	USD
CY2020Q1	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	2613000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	12689000	USD
CY2020Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	50582000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	477755000	USD
CY2020Q4	us-gaap	Derivative Assets DerivativeAssets	174000	USD
CY2020Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	490618000	USD
CY2020Q4	us-gaap	Business Combination Contingent Consideration Liability BusinessCombinationContingentConsiderationLiability	748000	USD
CY2020Q4	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	748000	USD
CY2020Q1	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	338489000	USD
CY2020Q1	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	389071000	USD
CY2020Q1	us-gaap	Business Combination Contingent Consideration Liability BusinessCombinationContingentConsiderationLiability	1748000	USD
CY2020Q1	us-gaap	Derivative Liabilities DerivativeLiabilities	49000	USD
CY2020Q1	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	1797000	USD
CY2020Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	1748000	USD
	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements	1000000	USD
CY2020Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	748000	USD
CY2020Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	15428000	USD
CY2020Q1	us-gaap	Inventory Raw Materials InventoryRawMaterials	15311000	USD
CY2020Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	46000	USD
CY2020Q1	us-gaap	Inventory Work In Process InventoryWorkInProcess	819000	USD
CY2020Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	5600000	USD
CY2020Q1	us-gaap	Inventory Finished Goods InventoryFinishedGoods	5376000	USD
CY2020Q4	us-gaap	Other Inventory Capitalized Costs OtherInventoryCapitalizedCosts	4966000	USD
CY2020Q1	us-gaap	Other Inventory Capitalized Costs OtherInventoryCapitalizedCosts	721000	USD
CY2020Q4	us-gaap	Fifo Inventory Amount FIFOInventoryAmount	26040000	USD
CY2020Q1	us-gaap	Fifo Inventory Amount FIFOInventoryAmount	22227000	USD
CY2018Q3	ntct	Transitional Services Period TransitionalServicesPeriod	P18M
CY2020Q4	ntct	Proceeds From Divestiture Of Businesses Transitional Services ProceedsFromDivestitureOfBusinessesTransitionalServices	100000	USD
CY2019Q4	ntct	Proceeds From Divestiture Of Businesses Transitional Services ProceedsFromDivestitureOfBusinessesTransitionalServices	-25000	USD
	ntct	Proceeds From Divestiture Of Businesses Transitional Services ProceedsFromDivestitureOfBusinessesTransitionalServices	200000	USD
	ntct	Proceeds From Divestiture Of Businesses Transitional Services ProceedsFromDivestitureOfBusinessesTransitionalServices	1200000	USD
	us-gaap	Number Of Reporting Units NumberOfReportingUnits	2	reporting_unit
	us-gaap	Number Of Reporting Units NumberOfReportingUnits	2	reporting_unit
CY2019Q4	us-gaap	Number Of Reporting Units NumberOfReportingUnits	1	reporting_unit
	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
CY2020Q1	us-gaap	Goodwill Goodwill	1700000000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	1700000000	USD
CY2020Q1	us-gaap	Goodwill Goodwill	1725680000	USD
	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-11571000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	1714109000	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	535100000	USD
CY2020Q1	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	582200000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	1113754000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	597259000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	516495000	USD
CY2020Q1	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	1091953000	USD
CY2020Q1	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	528374000	USD
CY2020Q1	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	563579000	USD
CY2020Q4	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	20455000	USD
CY2019Q4	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	22689000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	61422000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	68453000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear	20352000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	71881000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	64112000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	55830000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	48729000	USD
CY2020Q4	ntct	Finite Lived Intangible Asset Expected Amortization After Year Four FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour	255591000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	516495000	USD
	us-gaap	Acquired Finite Lived Intangible Assets Weighted Average Useful Life AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife	P14Y7M6D
	ntct	Hedging Forecasted Cash Flows For Operating Expenses Denominated In Foreign Currencies Managed In Months HedgingForecastedCashFlowsForOperatingExpensesDenominatedInForeignCurrenciesManagedInMonths	P12M
	ntct	Contract Maturing Over Next Months ContractMaturingOverNextMonths	P12M
CY2018Q1	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	25000000	shares
CY2020	ntct	Restructuring And Related Cost Number Of Restructuring Plans RestructuringAndRelatedCostNumberOfRestructuringPlans	2	plan
	us-gaap	Other Restructuring Costs OtherRestructuringCosts	100000	USD
CY2020Q1	us-gaap	Restructuring Reserve RestructuringReserve	1720000	USD
	ntct	Restructuring Charges And Other Adjustments RestructuringChargesAndOtherAdjustments	62000	USD
	us-gaap	Payments For Restructuring PaymentsForRestructuring	1863000	USD
	us-gaap	Restructuring Reserve Accrual Adjustment1 RestructuringReserveAccrualAdjustment1	81000	USD
CY2020Q4	us-gaap	Restructuring Reserve RestructuringReserve	0	USD
CY2020Q4	us-gaap	Operating Lease Cost OperatingLeaseCost	3277000	USD
CY2019Q4	us-gaap	Operating Lease Cost OperatingLeaseCost	3459000	USD
	us-gaap	Operating Lease Cost OperatingLeaseCost	9803000	USD
	us-gaap	Operating Lease Cost OperatingLeaseCost	9980000	USD
CY2020Q4	us-gaap	Short Term Lease Cost ShortTermLeaseCost	804000	USD
CY2019Q4	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1681000	USD
	us-gaap	Short Term Lease Cost ShortTermLeaseCost	3184000	USD
	us-gaap	Short Term Lease Cost ShortTermLeaseCost	3430000	USD
CY2020Q4	us-gaap	Variable Lease Cost VariableLeaseCost	895000	USD
CY2019Q4	us-gaap	Variable Lease Cost VariableLeaseCost	974000	USD
	us-gaap	Variable Lease Cost VariableLeaseCost	2845000	USD
	us-gaap	Variable Lease Cost VariableLeaseCost	3249000	USD
CY2020Q4	us-gaap	Lease Cost LeaseCost	4976000	USD
CY2019Q4	us-gaap	Lease Cost LeaseCost	6114000	USD
	us-gaap	Lease Cost LeaseCost	15832000	USD
	us-gaap	Lease Cost LeaseCost	16659000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1902000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	5474000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y11M1D
CY2020Q1	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P8Y7M2D
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.041
CY2020Q1	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.041
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	2522000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	14705000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	12477000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	10248000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	10081000	USD
CY2020Q4	ntct	Lessee Operating Lease Liability Payments Due After Year Four LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour	38416000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	88449000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	12882000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	75567000	USD
CY2016Q1	ntct	Number Of Subsidiary Entities NumberOfSubsidiaryEntities	2	subsidiary
CY2016Q1	us-gaap	Loss Contingency Patents Allegedly Infringed Number LossContingencyPatentsAllegedlyInfringedNumber	5	patent
CY2017Q4	us-gaap	Loss Contingency Patents Allegedly Infringed Number LossContingencyPatentsAllegedlyInfringedNumber	3	patent
CY2018Q3	us-gaap	Loss Contingency Damages Awarded Value LossContingencyDamagesAwardedValue	2800000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	55000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	45000	USD
	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	159000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	105000	USD
	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	283000	USD
	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	131000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	97000	USD
	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	307000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	152000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	150000	USD
	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	442000	USD
	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	438000	USD
	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	300000	USD
CY2020Q1	us-gaap	Defined Benefit Plan Expected Future Employer Contributions Current Fiscal Year DefinedBenefitPlanExpectedFutureEmployerContributionsCurrentFiscalYear	1000000.0	USD
CY2017Q4	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	20000000	shares
CY2020Q4	us-gaap	Stock Repurchase Program Remaining Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased	7089160	shares
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	29021000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	36725000	USD
	us-gaap	Net Income Loss NetIncomeLoss	7915000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-10090000	USD
CY2020Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	73492000	shares
CY2019Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	74367000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	72953000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	75780000	shares
CY2020Q4	us-gaap	Weighted Average Number Of Shares Restricted Stock WeightedAverageNumberOfSharesRestrictedStock	386000	shares
CY2019Q4	us-gaap	Weighted Average Number Of Shares Restricted Stock WeightedAverageNumberOfSharesRestrictedStock	333000	shares
	us-gaap	Weighted Average Number Of Shares Restricted Stock WeightedAverageNumberOfSharesRestrictedStock	665000	shares
	us-gaap	Weighted Average Number Of Shares Restricted Stock WeightedAverageNumberOfSharesRestrictedStock	0	shares
CY2020Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	73878000	shares
CY2019Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	74700000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	73618000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	75780000	shares
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.39
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.49
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.11
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.13
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.39
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.49
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.11
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.13
CY2020Q4	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.030
CY2019Q4	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.116
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.149
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.472
	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	1	Segment
CY2020Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	228739000	USD
CY2019Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	260024000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	617893000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	662469000	USD

Files In Submission

Name	View Source	Status
0001628280-21-001478-index-headers.html	Edgar Link	pending
0001628280-21-001478-index.html	Edgar Link	pending
0001628280-21-001478.txt	Edgar Link	pending
0001628280-21-001478-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
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ntct-20201231.xsd	Edgar Link	pending
ntct-20201231_cal.xml	Edgar Link	unprocessable
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$NTCT
NETSCOUT SYSTEMS INC Stock $ntct

2021 Q1 Form 10-Q Financial Statement

#000162828021001478 Filed on February 04, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NTCT NETSCOUT SYSTEMS INC Stock $ntct

2021 Q1 Form 10-Q Financial Statement

#000162828021001478 Filed on February 04, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NTCT
NETSCOUT SYSTEMS INC Stock $ntct