$ANET
Arista Networks, Inc. Stock $anet

$anet Overview Financials Valuation SEC Filings Company Website

2018 Form 10-K Financial Statement

#000159653219000027 Filed on February 15, 2019

Income Statement

Concept	2018	2017 Q4	2017 Q3
Revenue	$2.151B	$467.9M	$437.6M
YoY Change	30.69%	42.66%	50.77%
Cost Of Revenue	$778.0M	$160.7M	$157.0M
YoY Change	33.12%	36.4%	51.21%
Gross Profit	$1.373B	$307.2M	$280.6M
YoY Change	29.35%	46.16%	50.53%
Gross Profit Margin	63.84%	65.65%	64.12%
Selling, General & Admin	$252.6M	$60.60M	$60.18M
YoY Change	4.41%	-1.09%	14.07%
% of Gross Profit	18.39%	19.73%	21.44%
Research & Development	$442.5M	$107.2M	$79.61M
YoY Change	26.57%	50.12%	12.69%
% of Gross Profit	32.22%	34.89%	28.37%
Depreciation & Amortization	$27.67M	$5.200M	$5.200M
YoY Change	34.06%	6.12%	1.96%
% of Gross Profit	2.01%	1.69%	1.85%
Operating Expenses	$1.100B	$167.8M	$139.8M
YoY Change	85.97%	26.47%	13.28%
Operating Profit	$273.3M	$139.4M	$140.8M
YoY Change	-41.87%	79.87%	123.47%
Interest Expense	$2.701M	-$700.0K	$701.0K
YoY Change	-2.84%	-22.22%	-200.14%
% of Operating Profit	0.99%	-0.5%	0.5%
Other Income/Expense, Net	$15.45M	$2.247M	$1.435M
YoY Change	244.34%	-727.65%	-1594.79%
Pretax Income	$288.8M	$141.6M	$142.3M
YoY Change	-39.17%	83.61%	126.09%
Income Tax	-$39.31M	$37.80M	$8.545M
% Of Pretax Income	-13.61%	26.69%	6.01%
Net Earnings	$328.1M	$103.8M	$133.7M
YoY Change	-22.47%	76.64%	160.89%
Net Earnings / Revenue	15.25%	22.19%	30.56%
Basic Earnings Per Share	$4.39	$1.42	$1.84
Diluted Earnings Per Share	$4.06	$1.29	$1.68
COMMON SHARES
Basic Shares Outstanding	74.75M shares	73.10M shares	72.59M shares
Diluted Shares Outstanding	80.84M shares		79.32M shares

Balance Sheet

Concept	2018	2017 Q4	2017 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.956B	$1.536B	$1.343B
YoY Change	27.38%	76.94%	67.86%
Cash & Equivalents	$650.0M	$859.2M	$854.5M
Short-Term Investments	$1.306B	$676.4M	$488.6M
Other Short-Term Assets	$141.4M	$96.22M	$126.2M
YoY Change	-1.26%	21.58%	127.93%
Inventory	$279.2M	$306.2M	$333.2M
Prepaid Expenses
Receivables	$338.1M	$247.3M	$212.6M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$2.715B	$2.266B	$2.076B
YoY Change	19.78%	48.51%	56.74%
LONG-TERM ASSETS
Property, Plant & Equipment	$75.40M	$74.28M	$73.06M
YoY Change	1.48%	-3.48%	-6.51%
Goodwill		$0.00
YoY Change
Intangibles
YoY Change
Long-Term Investments	$30.30M	$36.10M	$36.10M
YoY Change	-16.07%	0.0%	0.0%
Other Assets	$149.2M	$18.89M	$21.28M
YoY Change	77.62%	0.36%	15.65%
Total Long-Term Assets	$367.2M	$194.4M	$226.2M
YoY Change	88.79%	-4.17%	16.04%
TOTAL ASSETS
Total Short-Term Assets	$2.715B	$2.266B	$2.076B
Total Long-Term Assets	$367.2M	$194.4M	$226.2M
Total Assets	$3.082B	$2.461B	$2.302B
YoY Change	25.24%	42.33%	51.52%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$93.80M	$52.20M	$32.89M
YoY Change	79.69%	-34.3%	-57.31%
Accrued Expenses	$123.3M	$133.8M	$94.46M
YoY Change	-7.85%	47.14%	22.41%
Deferred Revenue		$327.7M
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$606.5M	$529.9M	$567.5M
YoY Change	14.46%	15.31%	59.84%
LONG-TERM LIABILITIES
Long-Term Debt	$35.40M	$37.70M	$38.20M
YoY Change	-6.1%	-4.8%	-4.5%
Other Long-Term Liabilities	$296.7M	$9.745M	$7.811M
YoY Change	28.22%	22.46%	13.2%
Total Long-Term Liabilities	$332.1M	$9.745M	$7.811M
YoY Change	23.41%	22.46%	13.2%
TOTAL LIABILITIES
Total Short-Term Liabilities	$606.5M	$529.9M	$567.5M
Total Long-Term Liabilities	$332.1M	$9.745M	$7.811M
Total Liabilities	$938.6M	$798.9M	$777.2M
YoY Change	17.49%	28.62%	53.09%
SHAREHOLDERS EQUITY
Retained Earnings		$859.1M	$755.3M
YoY Change		97.45%	100.7%
Common Stock		$7.000K	$7.000K
YoY Change		0.0%	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$2.143B	$1.662B	$1.525B
YoY Change
Total Liabilities & Shareholders Equity	$3.082B	$2.461B	$2.302B
YoY Change	25.24%	42.33%	51.52%

Cashflow Statement

Concept	2018	2017 Q4	2017 Q3
OPERATING ACTIVITIES
Net Income	$328.1M	$103.8M	$133.7M
YoY Change	-22.47%	76.64%	160.89%
Depreciation, Depletion And Amortization	$27.67M	$5.200M	$5.200M
YoY Change	34.06%	6.12%	1.96%
Cash From Operating Activities	$503.1M	$183.6M	$205.9M
YoY Change	-20.35%	179.88%	-718.32%
INVESTING ACTIVITIES
Capital Expenditures	$23.83M	-$3.100M	-$2.700M
YoY Change	55.97%	-36.73%	-28.95%
Acquisitions	$96.82M
YoY Change
Other Investing Activities	$0.00	-$189.1M	-$184.8M
YoY Change	-100.0%	14446.15%	2300.0%
Cash From Investing Activities	-$755.1M	-$192.2M	-$187.4M
YoY Change	92.97%	3000.0%	1543.86%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$0.00
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	$42.85M	13.30M	12.20M
YoY Change	-16.74%	54.65%	-13.48%
NET CHANGE
Cash From Operating Activities	$503.1M	183.6M	205.9M
Cash From Investing Activities	-$755.1M	-192.2M	-187.4M
Cash From Financing Activities	$42.85M	13.30M	12.20M
Net Change In Cash	-$210.5M	4.700M	30.70M
YoY Change	-171.97%	-93.09%	-200.33%
FREE CASH FLOW
Cash From Operating Activities	$503.1M	$183.6M	$205.9M
Capital Expenditures	$23.83M	-$3.100M	-$2.700M
Free Cash Flow	$479.3M	$186.7M	$208.6M
YoY Change	-22.24%	164.82%	-807.12%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2017Q4	anet	Accrued Manufacturing Costs Current AccruedManufacturingCostsCurrent	35703000	USD
CY2018Q4	anet	Accrued Manufacturing Costs Current AccruedManufacturingCostsCurrent	31336000	USD
CY2017Q4	anet	Accrued Product Development Costs Current AccruedProductDevelopmentCostsCurrent	21201000	USD
CY2018Q4	anet	Accrued Product Development Costs Current AccruedProductDevelopmentCostsCurrent	6988000	USD
CY2016	anet	Adjustmentsto Additional Paidin Capital Vestingof Early Exercised Stock Options AdjustmentstoAdditionalPaidinCapitalVestingofEarlyExercisedStockOptions	1082000	USD
CY2017	anet	Adjustmentsto Additional Paidin Capital Vestingof Early Exercised Stock Options AdjustmentstoAdditionalPaidinCapitalVestingofEarlyExercisedStockOptions	564000	USD
CY2018	anet	Adjustmentsto Additional Paidin Capital Vestingof Early Exercised Stock Options AdjustmentstoAdditionalPaidinCapitalVestingofEarlyExercisedStockOptions	305000	USD
CY2016	anet	Adjustmentsto Additional Paidin Capital Vestingof Stock Optionsand Restricted Stock AdjustmentstoAdditionalPaidinCapitalVestingofStockOptionsandRestrictedStock	1082000	USD
CY2017	anet	Adjustmentsto Additional Paidin Capital Vestingof Stock Optionsand Restricted Stock AdjustmentstoAdditionalPaidinCapitalVestingofStockOptionsandRestrictedStock	564000	USD
CY2018	anet	Adjustmentsto Additional Paidin Capital Vestingof Stock Optionsand Restricted Stock AdjustmentstoAdditionalPaidinCapitalVestingofStockOptionsandRestrictedStock	305000	USD
CY2016	anet	Allowance For Doubtful Accounts Increase Decrease From Business Acquisition AllowanceForDoubtfulAccountsIncreaseDecreaseFromBusinessAcquisition	0	USD
CY2017	anet	Allowance For Doubtful Accounts Increase Decrease From Business Acquisition AllowanceForDoubtfulAccountsIncreaseDecreaseFromBusinessAcquisition	0	USD
CY2018	anet	Allowance For Doubtful Accounts Increase Decrease From Business Acquisition AllowanceForDoubtfulAccountsIncreaseDecreaseFromBusinessAcquisition	132000	USD
CY2017Q4	anet	Allowancefor Doubtful Accountsand Product Sales Return Reserve AllowanceforDoubtfulAccountsandProductSalesReturnReserve	7535000	USD
CY2018Q4	anet	Allowancefor Doubtful Accountsand Product Sales Return Reserve AllowanceforDoubtfulAccountsandProductSalesReturnReserve	9120000	USD
CY2018Q4	anet	Availableforsale Securities Debt Maturities Year One Through Two Fair Value AvailableforsaleSecuritiesDebtMaturitiesYearOneThroughTwoFairValue	430699000	USD
CY2017Q4	anet	Cash Equivalents Marketable Securities And Other Assets Amortized Cost CashEquivalentsMarketableSecuritiesAndOtherAssetsAmortizedCost	1397330000	USD
CY2018Q4	anet	Cash Equivalents Marketable Securities And Other Assets Amortized Cost CashEquivalentsMarketableSecuritiesAndOtherAssetsAmortizedCost	1634065000	USD
CY2016	anet	Contract Manufacturerand Supplier Liability ContractManufacturerandSupplierLiability	6200000	USD
CY2017	anet	Contract Manufacturerand Supplier Liability ContractManufacturerandSupplierLiability	21200000	USD
CY2018	anet	Contract Manufacturerand Supplier Liability ContractManufacturerandSupplierLiability	0	USD
CY2018	anet	Contractwith Customer Liability Beginning Balance Reclassified To Deferred Revenue ContractwithCustomerLiabilityBeginningBalanceReclassifiedToDeferredRevenue	371000	USD
CY2018	anet	Contractwith Customer Liability Contract Liabilities Recognized ContractwithCustomerLiabilityContractLiabilitiesRecognized	24006000	USD
CY2017Q4	anet	Deferred Tax Assets Capitalized Research And Development DeferredTaxAssetsCapitalizedResearchAndDevelopment	0	USD
CY2018Q4	anet	Deferred Tax Assets Capitalized Research And Development DeferredTaxAssetsCapitalizedResearchAndDevelopment	30027000	USD
CY2016	anet	Effective Income Tax Rate Reconciliation Nondeductible Expense Acquisition And Integration Costs Percent EffectiveIncomeTaxRateReconciliationNondeductibleExpenseAcquisitionAndIntegrationCostsPercent	0.0000
CY2017	anet	Effective Income Tax Rate Reconciliation Nondeductible Expense Acquisition And Integration Costs Percent EffectiveIncomeTaxRateReconciliationNondeductibleExpenseAcquisitionAndIntegrationCostsPercent	0.0000
CY2018	anet	Effective Income Tax Rate Reconciliation Nondeductible Expense Acquisition And Integration Costs Percent EffectiveIncomeTaxRateReconciliationNondeductibleExpenseAcquisitionAndIntegrationCostsPercent	0.0212
CY2016	anet	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Percent	0.0000
CY2017	anet	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Percent	0.1114
CY2018	anet	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Percent	-0.0172
CY2016	anet	Effective Income Tax Rate Reconciliation Uncertain Tax Positionsand Associated Interest Percent EffectiveIncomeTaxRateReconciliationUncertainTaxPositionsandAssociatedInterestPercent	-0.0233
CY2017	anet	Effective Income Tax Rate Reconciliation Uncertain Tax Positionsand Associated Interest Percent EffectiveIncomeTaxRateReconciliationUncertainTaxPositionsandAssociatedInterestPercent	0.0000
CY2018	anet	Effective Income Tax Rate Reconciliation Uncertain Tax Positionsand Associated Interest Percent EffectiveIncomeTaxRateReconciliationUncertainTaxPositionsandAssociatedInterestPercent	0.0000
CY2017Q4	anet	Equity Securities Without Readily Determinable Fair Value Initial Costs EquitySecuritiesWithoutReadilyDeterminableFairValueInitialCosts	36100000	USD
CY2018Q4	anet	Equity Securities Without Readily Determinable Fair Value Initial Costs EquitySecuritiesWithoutReadilyDeterminableFairValueInitialCosts	44100000	USD
CY2016	anet	Incremental Common Shares Attributableto Dilutive Effectof Employee Stock Purchase Plan IncrementalCommonSharesAttributabletoDilutiveEffectofEmployeeStockPurchasePlan	43000	shares
CY2017	anet	Incremental Common Shares Attributableto Dilutive Effectof Employee Stock Purchase Plan IncrementalCommonSharesAttributabletoDilutiveEffectofEmployeeStockPurchasePlan	120000	shares
CY2018	anet	Incremental Common Shares Attributableto Dilutive Effectof Employee Stock Purchase Plan IncrementalCommonSharesAttributabletoDilutiveEffectofEmployeeStockPurchasePlan	11000	shares
CY2017Q1	anet	Interest Expense Excluding Related Party InterestExpenseExcludingRelatedParty	715000	USD
CY2017Q2	anet	Interest Expense Excluding Related Party InterestExpenseExcludingRelatedParty	623000	USD
CY2017Q3	anet	Interest Expense Excluding Related Party InterestExpenseExcludingRelatedParty	701000	USD
CY2017Q4	anet	Interest Expense Excluding Related Party InterestExpenseExcludingRelatedParty	741000	USD
CY2018Q1	anet	Interest Expense Excluding Related Party InterestExpenseExcludingRelatedParty	687000	USD
CY2018Q2	anet	Interest Expense Excluding Related Party InterestExpenseExcludingRelatedParty	680000	USD
CY2018Q3	anet	Interest Expense Excluding Related Party InterestExpenseExcludingRelatedParty	673000	USD
CY2018Q4	anet	Interest Expense Excluding Related Party InterestExpenseExcludingRelatedParty	661000	USD
CY2016	anet	Interest Paid Lease Financing Obligation InterestPaidLeaseFinancingObligation	2916000	USD
CY2017	anet	Interest Paid Lease Financing Obligation InterestPaidLeaseFinancingObligation	2814000	USD
CY2018	anet	Interest Paid Lease Financing Obligation InterestPaidLeaseFinancingObligation	2692000	USD
CY2017Q4	anet	Inventory Deposit Current InventoryDepositCurrent	34141000	USD
CY2018Q4	anet	Inventory Deposit Current InventoryDepositCurrent	14639000	USD
CY2018Q4	anet	Lease Financing Obligation Future Minimum Payments Due LeaseFinancingObligationFutureMinimumPaymentsDue	31649000	USD
CY2018Q4	anet	Lease Financing Obligation Future Minimum Payments Due Next Twelve Months LeaseFinancingObligationFutureMinimumPaymentsDueNextTwelveMonths	6321000	USD
CY2018Q4	anet	Lease Financing Obligation Future Minimum Payments Due Thereafter LeaseFinancingObligationFutureMinimumPaymentsDueThereafter	0	USD
CY2018Q4	anet	Lease Financing Obligation Future Minimum Payments Duein Five Years LeaseFinancingObligationFutureMinimumPaymentsDueinFiveYears	5265000	USD
CY2018Q4	anet	Lease Financing Obligation Future Minimum Payments Duein Four Years LeaseFinancingObligationFutureMinimumPaymentsDueinFourYears	6871000	USD
CY2018Q4	anet	Lease Financing Obligation Future Minimum Payments Duein Three Years LeaseFinancingObligationFutureMinimumPaymentsDueinThreeYears	6686000	USD
CY2018Q4	anet	Lease Financing Obligation Future Minimum Payments Duein Two Years LeaseFinancingObligationFutureMinimumPaymentsDueinTwoYears	6506000	USD
CY2018Q4	anet	Lease Financing Obligation Future Minimum Payments Interestand Land Lease Expense Includedin Payments LeaseFinancingObligationFutureMinimumPaymentsInterestandLandLeaseExpenseIncludedinPayments	17536000	USD
CY2018Q4	anet	Lease Financing Obligation Property Revertingto Landlord LeaseFinancingObligationPropertyRevertingtoLandlord	23630000	USD
CY2013Q3	anet	Lessee Leasing Arrangements Financing Obligation Termof Contract LesseeLeasingArrangementsFinancingObligationTermofContract	P120M
CY2017Q2	anet	Loss Contingency Violationof Ceaseand Desist Order Recommended Civil Penalty LossContingencyViolationofCeaseandDesistOrderRecommendedCivilPenalty	307000000	USD
CY2018	anet	Marketable Securities Weighted Average Remaining Life MarketableSecuritiesWeightedAverageRemainingLife	P8M24D
CY2015Q4	anet	Product Return Reserve Current ProductReturnReserveCurrent	566000	USD
CY2016Q4	anet	Product Return Reserve Current ProductReturnReserveCurrent	1317000	USD
CY2017Q4	anet	Product Return Reserve Current ProductReturnReserveCurrent	7423000	USD
CY2018Q4	anet	Product Return Reserve Current ProductReturnReserveCurrent	8613000	USD
CY2016	anet	Repaymentsof Longterm Lease Financing Obligations RepaymentsofLongtermLeaseFinancingObligations	1336000	USD
CY2017	anet	Repaymentsof Longterm Lease Financing Obligations RepaymentsofLongtermLeaseFinancingObligations	1617000	USD
CY2018	anet	Repaymentsof Longterm Lease Financing Obligations RepaymentsofLongtermLeaseFinancingObligations	1929000	USD
CY2017Q4	anet	Restricted Cash Letterof Credit RestrictedCashLetterofCredit	1100000	USD
CY2017Q4	anet	Restricted Cash Pledged As Collateral RestrictedCashPledgedAsCollateral	4000000	USD
CY2016	anet	Return Reserve Consumption ReturnReserveConsumption	4371000	USD
CY2017	anet	Return Reserve Consumption ReturnReserveConsumption	11265000	USD
CY2018	anet	Return Reserve Consumption ReturnReserveConsumption	3079000	USD
CY2016	anet	Sales Return Reserve Chargedto Revenue SalesReturnReserveChargedtoRevenue	5122000	USD
CY2017	anet	Sales Return Reserve Chargedto Revenue SalesReturnReserveChargedtoRevenue	17371000	USD
CY2018	anet	Sales Return Reserve Chargedto Revenue SalesReturnReserveChargedtoRevenue	4269000	USD
CY2018	anet	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Shares Traded For Taxes ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSharesTradedForTaxes	36000	shares
CY2017	anet	Tax Cuts And Jobs Actof2017 Incomplete Accounting Global Intangible Low Taxed Income Deferred Tax Benefit TaxCutsAndJobsActof2017IncompleteAccountingGlobalIntangibleLowTaxedIncomeDeferredTaxBenefit	11000000	USD
CY2018	anet	Tax Cutsand Jobs Actof2017 Transition Taxfor Accumulated Foreign Earnings Income Tax Expense TaxCutsandJobsActof2017TransitionTaxforAccumulatedForeignEarningsIncomeTaxExpense	6100000	USD
CY2017Q4	us-gaap	Accrued Income Taxes AccruedIncomeTaxes	794000	USD
CY2018	anet	Warranty Termon Hardware Products WarrantyTermonHardwareProducts	P1Y
CY2018	anet	Warranty Termon Software Embeddedin Products WarrantyTermonSoftwareEmbeddedinProducts	P90D
CY2018Q4	us-gaap	Accrued Income Taxes AccruedIncomeTaxes	839000	USD
CY2017	anet	Specific Product Warranty Accrual Warranties Issued SpecificProductWarrantyAccrualWarrantiesIssued	0	USD
CY2018	anet	Specific Product Warranty Accrual Warranties Issued SpecificProductWarrantyAccrualWarrantiesIssued	0	USD
CY2017Q4	anet	Tax Cuts And Jobs Act Of2017 Incomplete Accounting Provisional Income Tax Expense Benefit TaxCutsAndJobsActOf2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefit	51800000	USD
CY2017Q4	anet	Tax Cuts And Jobs Act Of2017 Incomplete Accounting Transition Tax For Accumulated Foreign Earnings Provisional Liability TaxCutsAndJobsActOf2017IncompleteAccountingTransitionTaxForAccumulatedForeignEarningsProvisionalLiability	18800000	USD
CY2017	anet	Tax Cuts And Jobs Actof2017 Incomplete Accounting Changein Tax Rate Deferred Tax Asset Provisional Income Tax Expense Benefit TaxCutsAndJobsActof2017IncompleteAccountingChangeinTaxRateDeferredTaxAssetProvisionalIncomeTaxExpenseBenefit	33000000	USD
CY2018	dei	Amendment Flag AmendmentFlag	false
CY2018	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2018	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2018	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
CY2018	dei	Document Period End Date DocumentPeriodEndDate	2018-12-31
CY2018	dei	Document Type DocumentType	10-K
CY2018	dei	Entity Central Index Key EntityCentralIndexKey	0001596532
CY2019Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	75730873	shares
CY2018	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2018	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2018	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2018Q2	dei	Entity Public Float EntityPublicFloat	14715944627	USD
CY2018	dei	Entity Registrant Name EntityRegistrantName	Arista Networks, Inc.
CY2018	dei	Entity Shell Company EntityShellCompany	false
CY2018	dei	Entity Small Business EntitySmallBusiness	false
CY2018	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2018	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2018	dei	Trading Symbol TradingSymbol	ANET
CY2017Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	52200000	USD
CY2018Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	93757000	USD
CY2017Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	254881000	USD
CY2018Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	340897000	USD
CY2017Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	247346000	USD
CY2018Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	331777000	USD
CY2017Q4	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	34067000	USD
CY2018Q4	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	36167000	USD
CY2017Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	133827000	USD
CY2018Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	123254000	USD
CY2017Q4	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	7086000	USD
CY2018Q4	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	5678000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	69020000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	90012000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1938000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-3994000	USD
CY2017Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	804731000	USD
CY2018Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	956572000	USD
CY2016	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	1100000	USD
CY2017	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	4025000	USD
CY2018	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	8878000	USD
CY2016	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	59032000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	75427000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	91202000	USD
CY2016	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	42100000	USD
CY2016	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	42084000	USD
CY2016	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	59032000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	75427000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	91202000	USD
CY2015Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	963000	USD
CY2016Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	204000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	112000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	507000	USD
CY2016	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	467000	USD
CY2017	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	109000	USD
CY2018	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	105000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	5100000	USD
CY2016	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	2594000	shares
CY2017	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	58000	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	211000	shares
CY2017Q4	us-gaap	Assets Assets	2460860000	USD
CY2018Q4	us-gaap	Assets Assets	3081983000	USD
CY2017Q4	us-gaap	Assets Current AssetsCurrent	2266429000	USD
CY2018Q4	us-gaap	Assets Current AssetsCurrent	2714802000	USD
CY2017Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	1395741000	USD
CY2018Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	1632491000	USD
CY2017Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	22000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	622000	USD
CY2017Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1611000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	2196000	USD
CY2017Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	677952000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1307771000	USD
CY2017	us-gaap	Available For Sale Debt Securities Gross Unrealized Loss AvailableForSaleDebtSecuritiesGrossUnrealizedLoss	0	USD
CY2018	us-gaap	Available For Sale Debt Securities Gross Unrealized Loss AvailableForSaleDebtSecuritiesGrossUnrealizedLoss	0	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	875498000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	676363000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1306197000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Securities Current AvailableForSaleSecuritiesDebtSecuritiesCurrent	676363000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Securities Current AvailableForSaleSecuritiesDebtSecuritiesCurrent	1306197000	USD
CY2016	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	869000	USD
CY2017	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	3811000	USD
CY2018	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	2340000	USD
CY2018Q4	us-gaap	Capital Leases Future Minimum Payments Due CapitalLeasesFutureMinimumPaymentsDue	14113000	USD
CY2018Q4	us-gaap	Capitalized Contract Cost Amortization Period CapitalizedContractCostAmortizationPeriod	P5Y
CY2018Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	6400000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	713873000	USD
CY2015Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	691367000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	572168000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	864697000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	567923000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	859192000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	649950000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	654164000	USD
CY2016	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-119199000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	292529000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-210533000	USD
CY2017Q4	us-gaap	Cash Equivalents At Carrying Value CashEquivalentsAtCarryingValue	713873000	USD
CY2017Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2018Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000	shares
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	73706000	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	75668000	shares
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	73706000	shares
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	75668000	shares
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	7000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	8000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	183389000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	422738000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	326059000	USD
CY2017Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	0	USD
CY2018Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	6341000	USD
CY2017Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	16521000	USD
CY2018Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	32595000	USD
CY2017Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	327706000	USD
CY2018Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	358586000	USD
CY2017Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	187556000	USD
CY2018Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	228641000	USD
CY2018	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	7561000	USD
CY2016	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	406051000	USD
CY2017Q1	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	121265000	USD
CY2017Q2	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	145434000	USD
CY2017Q3	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	157016000	USD
CY2017Q4	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	160702000	USD
CY2017	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	584417000	USD
CY2018Q1	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	169570000	USD
CY2018Q2	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	185962000	USD
CY2018Q3	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	201726000	USD
CY2018Q4	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	220734000	USD
CY2018	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	777992000	USD
CY2017	us-gaap	Cumulative Effect On Retained Earnings Net Of Tax1 CumulativeEffectOnRetainedEarningsNetOfTax1	2279000	USD
CY2018	us-gaap	Cumulative Effect On Retained Earnings Net Of Tax1 CumulativeEffectOnRetainedEarningsNetOfTax1	3574000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	64594000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	31935000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	6113000	USD
CY2016	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	4675000	USD
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	7322000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	10451000	USD
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	79798000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	42902000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	18582000	USD
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	10529000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3645000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2018000	USD
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-18579000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	12795000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-57726000	USD
CY2016	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	381000	USD
CY2018Q4	us-gaap	Debt Securities Available For Sale Term DebtSecuritiesAvailableForSaleTerm	P24M
CY2017	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-734000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	8426000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-57896000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	2015000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	19911000	USD
CY2016	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-21762000	USD
CY2017	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	8657000	USD
CY2018	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-57896000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	56700000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	56724000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Reserves And Accruals DeferredTaxLiabilitiesDeferredExpenseReservesAndAccruals	2006000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Reserves And Accruals DeferredTaxLiabilitiesDeferredExpenseReservesAndAccruals	5190000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	3994000	USD
CY2017Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	65125000	USD
CY2018Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	126492000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-21720000	USD
CY2017Q4	us-gaap	Deferred Revenue DeferredRevenue	498740000	USD
CY2018Q4	us-gaap	Deferred Revenue DeferredRevenue	587227000	USD
CY2018	us-gaap	Deferred Revenue Period Increase Decrease DeferredRevenuePeriodIncreaseDecrease	417245000	USD
CY2018	us-gaap	Deferred Revenue Revenue Recognized1 DeferredRevenueRevenueRecognized1	328758000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-3564000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-3404000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-4164000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	100394000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	199374000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	63247000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	122739000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	65125000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	126492000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	65262000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	142650000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	2432000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	11052000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	2115000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	2053000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	1942000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	1890000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	30831000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	57793000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	22050000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	19186000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	41024000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	77373000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	35132000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	35100000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	0	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	13401000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	1878000	USD
CY2018	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	1
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	27671000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	3753000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	9000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	1320000	USD
CY2016	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	0	USD
CY2017	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	3500000	USD
CY2018	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	4600000	USD
CY2018	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.03
CY2016	us-gaap	Depreciation Depreciation	19400000	USD
CY2017	us-gaap	Depreciation Depreciation	20200000	USD
CY2018	us-gaap	Depreciation Depreciation	21600000	USD
CY2016	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	19749000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	20640000	USD
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.66
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.16
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.42
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.84
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.42
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.85
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.95
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-2.08
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.25
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.26
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.39
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.50
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.07
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.30
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.68
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.29
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.35
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.79
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-2.08
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.08
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.10
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.06
CY2016	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-464000	USD
CY2017	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	753000	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-1390000	USD
CY2016	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.2396
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.1086
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.1361
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.0000
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.0000
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.0337
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.0281
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.2586
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.2490
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.0111
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.0104
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.0053
CY2017Q1	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	28800000	USD
CY2017Q2	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	19100000	USD
CY2017Q3	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	23800000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.0100
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.0227
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.0518
CY2017Q4	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	38300000	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	110000000	USD
CY2018Q1	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	25300000	USD
CY2018Q2	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	20100000	USD
CY2018Q3	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	22300000	USD
CY2018Q4	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	7800000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	75500000	USD
CY2016	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.0187
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.0003
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.0059
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.0439
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.0323
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.0768
CY2017Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	56626000	USD
CY2018Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	70755000	USD
CY2016	us-gaap	Equity Securities Fv Ni Unrealized Loss EquitySecuritiesFvNiUnrealizedLoss	0	USD
CY2017	us-gaap	Equity Securities Fv Ni Unrealized Loss EquitySecuritiesFvNiUnrealizedLoss	0	USD
CY2018	us-gaap	Equity Securities Fv Ni Unrealized Loss EquitySecuritiesFvNiUnrealizedLoss	13800000	USD
CY2017Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	36100000	USD
CY2018Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	30300000	USD
CY2018	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	15000000	USD
CY2017Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Cumulative Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossCumulativeAmount	0	USD
CY2018	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount	1200000	USD
CY2017Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	39600000	USD
CY2018Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	37700000	USD
CY2018Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	37743000	USD
CY2018Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	2300000	USD
CY2018Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	2312000	USD
CY2017Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	37673000	USD
CY2018Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	35400000	USD
CY2018Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	35431000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	5110000	USD
CY2018Q2	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	18420000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	1647000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	13375000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	7690000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	11513000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	12048000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	12337000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	63720000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	0	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	58610000	USD
CY2018	us-gaap	Finite Lived Intangible Assets Remaining Amortization Period1 FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1	P4Y8M20D
CY2016	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	-700000	USD
CY2017	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	-500000	USD
CY2018	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	300000	USD
CY2016	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	75239000	USD
CY2017Q1	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	22155000	USD
CY2017Q2	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	23319000	USD
CY2017Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	19535000	USD
CY2017Q4	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	21789000	USD
CY2017	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	86798000	USD
CY2018Q1	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	19679000	USD
CY2018Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	15321000	USD
CY2018Q4	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	12000000	USD
CY2018	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	65420000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	0	USD
CY2018Q4	us-gaap	Goodwill Goodwill	53684000	USD
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2016	us-gaap	Gross Profit GrossProfit	723116000	USD
CY2017Q1	us-gaap	Gross Profit GrossProfit	214210000	USD
CY2017Q2	us-gaap	Gross Profit GrossProfit	259777000	USD
CY2017Q3	us-gaap	Gross Profit GrossProfit	280617000	USD
CY2017Q4	us-gaap	Gross Profit GrossProfit	307165000	USD
CY2017	us-gaap	Gross Profit GrossProfit	1061769000	USD
CY2018Q1	us-gaap	Gross Profit GrossProfit	302919000	USD
CY2018Q2	us-gaap	Gross Profit GrossProfit	333883000	USD
CY2018Q3	us-gaap	Gross Profit GrossProfit	361583000	USD
CY2018Q4	us-gaap	Gross Profit GrossProfit	374992000	USD
CY2018	us-gaap	Gross Profit GrossProfit	1373377000	USD
CY2017	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
CY2018	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
CY2016	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2017	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2018	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	196202000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	373221000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	136818000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	46023000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	101539000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	151983000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	58036000	USD
CY2017Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-9233000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	242225000	USD
CY2017Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	73728000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	117130000	USD
CY2017Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	142267000	USD
CY2017Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	141635000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	474760000	USD
CY2018Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	142894000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-241972000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	189389000	USD
CY2018Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	198490000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	288801000	USD
CY2017Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14445000	USD
CY2017Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8545000	USD
CY2017Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	37802000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	51559000	USD
CY2018Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-1644000	USD
CY2018Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-86703000	USD
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	20865000	USD
CY2018Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	28168000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-39314000	USD
CY2016	us-gaap	Income Taxes Paid IncomeTaxesPaid	39638000	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	44216000	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	17573000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	38678000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-30104000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	39337000	USD
CY2016	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	108856000	USD
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-5773000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	77916000	USD
CY2016	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	42650000	USD
CY2017	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	19921000	USD
CY2018	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-112000	USD
CY2016	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	30629000	USD
CY2017	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	43535000	USD
CY2018	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-14786000	USD
CY2016	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	176126000	USD
CY2017	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	142327000	USD
CY2018	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	70533000	USD
CY2016	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	144361000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	69708000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-51054000	USD
CY2016	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-2866000	USD
CY2017	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-907000	USD
CY2018	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	3389000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	8894000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	1475000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	17455000	USD
CY2016	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	115074000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	11645000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-21411000	USD
CY2016	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	4408000	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	6599000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	6083000	shares
CY2016	us-gaap	Interest Expense InterestExpense	3136000	USD
CY2017	us-gaap	Interest Expense InterestExpense	2780000	USD
CY2018	us-gaap	Interest Expense InterestExpense	2701000	USD
CY2016	us-gaap	Interest Expense Other InterestExpenseOther	3136000	USD
CY2017	us-gaap	Interest Expense Other InterestExpenseOther	2780000	USD
CY2018	us-gaap	Interest Expense Other InterestExpenseOther	2701000	USD
CY2016	us-gaap	Interest Income Other InterestIncomeOther	2995000	USD
CY2017	us-gaap	Interest Income Other InterestIncomeOther	8093000	USD
CY2018	us-gaap	Interest Income Other InterestIncomeOther	31666000	USD
CY2017Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	236525000	USD
CY2018Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	187762000	USD
CY2017Q4	us-gaap	Inventory Net InventoryNet	306198000	USD
CY2018Q4	us-gaap	Inventory Net InventoryNet	264557000	USD
CY2017Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	69673000	USD
CY2018Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	76795000	USD
CY2016	us-gaap	Inventory Write Down InventoryWriteDown	12100000	USD
CY2017	us-gaap	Inventory Write Down InventoryWriteDown	28100000	USD
CY2018	us-gaap	Inventory Write Down InventoryWriteDown	20800000	USD
CY2016	us-gaap	Investment Income Net Amortization Of Discount And Premium InvestmentIncomeNetAmortizationOfDiscountAndPremium	-1493000	USD
CY2017	us-gaap	Investment Income Net Amortization Of Discount And Premium InvestmentIncomeNetAmortizationOfDiscountAndPremium	-1452000	USD
CY2018	us-gaap	Investment Income Net Amortization Of Discount And Premium InvestmentIncomeNetAmortizationOfDiscountAndPremium	3360000	USD
CY2016	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	8100000	USD
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	9400000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	11600000	USD
CY2018Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	4000000	USD
CY2017Q4	us-gaap	Liabilities Liabilities	798946000	USD
CY2018Q4	us-gaap	Liabilities Liabilities	938594000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2460860000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	3081983000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	529905000	USD
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	606504000	USD
CY2016	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	0	USD
CY2017Q1	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	0	USD
CY2017Q2	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	0	USD
CY2017Q3	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	0	USD
CY2017Q4	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	0	USD
CY2017	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	0	USD
CY2018Q1	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	0	USD
CY2018Q2	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	405000000	USD
CY2018Q3	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	0	USD
CY2018Q4	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	0	USD
CY2018	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	405000000	USD
CY2017Q4	us-gaap	Long Term Investments LongTermInvestments	36136000	USD
CY2018Q4	us-gaap	Long Term Investments LongTermInvestments	30336000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	32745000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	51469000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	42851000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-325775000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-391320000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-755113000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	174295000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	631627000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	503119000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	184189000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	82961000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	102685000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	133722000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	103833000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	423201000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	144538000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	-155269000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	168524000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	170322000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	328115000	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	182965000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	422400000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	327926000	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	183039000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	422468000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	327941000	USD
CY2016	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-1184000	USD
CY2017Q1	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	310000	USD
CY2017Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	496000	USD
CY2017Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	1435000	USD
CY2017Q4	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	2247000	USD
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	4488000	USD
CY2018Q1	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	4156000	USD
CY2018Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-2169000	USD
CY2018Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	8619000	USD
CY2018Q4	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	4848000	USD
CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	15454000	USD
CY2018	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	1	segment
CY2018	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2016	us-gaap	Operating Expenses OperatingExpenses	479707000	USD
CY2017Q1	us-gaap	Operating Expenses OperatingExpenses	140792000	USD
CY2017Q2	us-gaap	Operating Expenses OperatingExpenses	143143000	USD
CY2017Q3	us-gaap	Operating Expenses OperatingExpenses	139785000	USD
CY2017Q4	us-gaap	Operating Expenses OperatingExpenses	167777000	USD
CY2017	us-gaap	Operating Expenses OperatingExpenses	591497000	USD
CY2018Q1	us-gaap	Operating Expenses OperatingExpenses	164181000	USD
CY2018Q2	us-gaap	Operating Expenses OperatingExpenses	573686000	USD
CY2018Q3	us-gaap	Operating Expenses OperatingExpenses	180813000	USD
CY2018Q4	us-gaap	Operating Expenses OperatingExpenses	181350000	USD
CY2018	us-gaap	Operating Expenses OperatingExpenses	1100030000	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	243409000	USD
CY2017Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	73418000	USD
CY2017Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	116634000	USD
CY2017Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	140832000	USD
CY2017Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	139388000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	470272000	USD
CY2018Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	138738000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	-239803000	USD
CY2018Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	180770000	USD
CY2018Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	193642000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	273347000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	103351000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	12789000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	12325000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	14291000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	14308000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	13769000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	35869000	USD
CY2017Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	5002000	USD
CY2018Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	2296000	USD
CY2017Q4	us-gaap	Other Assets Current OtherAssetsCurrent	96215000	USD
CY2018Q4	us-gaap	Other Assets Current OtherAssetsCurrent	95730000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	18891000	USD
CY2018Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	22704000	USD
CY2016	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-348000	USD
CY2017	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	672000	USD
CY2018	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-2069000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-800000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-463000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-2056000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-452000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-1135000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	13000	USD
CY2017Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	16172000	USD
CY2018Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	30907000	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	9745000	USD
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	31851000	USD
CY2016	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	-1043000	USD
CY2017	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	-825000	USD
CY2018	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	289000	USD
CY2016	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1952000	USD
CY2017Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1025000	USD
CY2017Q2	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1119000	USD
CY2017Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	2136000	USD
CY2017Q4	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	2988000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	7268000	USD
CY2018Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	4843000	USD
CY2018Q2	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-1489000	USD
CY2018Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	9292000	USD
CY2018Q4	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	5509000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	18155000	USD
CY2017Q4	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	8840000	USD
CY2018Q4	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	13316000	USD
CY2016	us-gaap	Other Significant Noncash Transaction Value Of Consideration Given1 OtherSignificantNoncashTransactionValueOfConsiderationGiven1	0	USD
CY2017	us-gaap	Other Significant Noncash Transaction Value Of Consideration Given1 OtherSignificantNoncashTransactionValueOfConsiderationGiven1	0	USD
CY2018	us-gaap	Other Significant Noncash Transaction Value Of Consideration Given1 OtherSignificantNoncashTransactionValueOfConsiderationGiven1	15555000	USD
CY2016	us-gaap	Payments For Proceeds From Investments PaymentsForProceedsFromInvestments	2500000	USD
CY2017	us-gaap	Payments For Proceeds From Investments PaymentsForProceedsFromInvestments	0	USD
CY2018	us-gaap	Payments For Proceeds From Investments PaymentsForProceedsFromInvestments	8000000	USD
CY2016	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	2000000	USD
CY2016	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1100000	USD
CY2017	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	4025000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	8878000	USD
CY2016	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	96821000	USD
CY2016	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	439711000	USD
CY2017	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	585373000	USD
CY2018	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	1174259000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	21419000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	15279000	USD
CY2017Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.0001
CY2018Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.0001
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	23830000	USD
CY2017Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	100000000	shares
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	100000000	shares
CY2017Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2018Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2017Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2018Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2017Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2018Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2017Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	177330000	USD
CY2018Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	162321000	USD
CY2017Q4	us-gaap	Prepaid Taxes PrepaidTaxes	38134000	USD
CY2018Q4	us-gaap	Prepaid Taxes PrepaidTaxes	38636000	USD
CY2016	us-gaap	Proceeds From Collection Of Notes Receivable ProceedsFromCollectionOfNotesReceivable	0	USD
CY2017	us-gaap	Proceeds From Collection Of Notes Receivable ProceedsFromCollectionOfNotesReceivable	3000000	USD
CY2018	us-gaap	Proceeds From Collection Of Notes Receivable ProceedsFromCollectionOfNotesReceivable	2000000	USD
CY2016	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	35181000	USD
CY2017	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	57111000	USD
CY2018	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	53658000	USD
CY2016	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	137855000	USD
CY2017	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	206332000	USD
CY2018	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	547797000	USD
CY2016Q4	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	6744000	USD
CY2017Q4	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	7415000	USD
CY2018Q4	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	5362000	USD
CY2017	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	4871000	USD
CY2018	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	5618000	USD
CY2017	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	5542000	USD
CY2018	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	3565000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	143299000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	165367000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	74279000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	75355000	USD
CY2018	us-gaap	Property Plant And Equipment Useful Life PropertyPlantAndEquipmentUsefulLife	P3Y
CY2016	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	-292000	USD
CY2017	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	17000	USD
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	368000	USD
CY2018Q4	us-gaap	Purchase Commitment Remaining Minimum Amount Committed PurchaseCommitmentRemainingMinimumAmountCommitted	389200000	USD
CY2016	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	273581000	USD
CY2017Q1	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	81610000	USD
CY2017Q2	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	81194000	USD
CY2017Q3	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	79610000	USD
CY2017Q4	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	107180000	USD
CY2017	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	349594000	USD
CY2018Q1	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	102362000	USD
CY2018Q2	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	104078000	USD
CY2018Q3	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	117589000	USD
CY2018Q4	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	118439000	USD
CY2018	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	442468000	USD
CY2016Q4	us-gaap	Restricted Cash RestrictedCash	4245000	USD
CY2017Q4	us-gaap	Restricted Cash RestrictedCash	5505000	USD
CY2018Q4	us-gaap	Revenue Remaining Performance Obligation Percentage RevenueRemainingPerformanceObligationPercentage	0.85
CY2018Q4	us-gaap	Revenue Remaining Performance Obligation Percentage RevenueRemainingPerformanceObligationPercentage	0.15
CY2016	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	130887000	USD
CY2017Q1	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	37027000	USD
CY2017Q2	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	38630000	USD
CY2018Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	519845000	USD
CY2017Q3	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	40640000	USD
CY2018Q4	us-gaap	Restricted Cash RestrictedCash	4214000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	859114000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1190803000	USD
CY2016	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1129167000	USD
CY2017Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	335475000	USD
CY2017Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	405211000	USD
CY2017Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	437633000	USD
CY2017Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	467867000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1646186000	USD
CY2018Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	472489000	USD
CY2018Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	563309000	USD
CY2018Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	595726000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2151369000	USD
CY2018	us-gaap	Revenue Performance Obligation Description Of Timing RevenuePerformanceObligationDescriptionOfTiming	30 days with some large high volume customers having extended terms up to 60 days
CY2018Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	621100000	USD
CY2018Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P2Y
CY2018Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P3Y
CY2017Q4	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	38808000	USD
CY2017	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	155105000	USD
CY2018Q1	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	42140000	USD
CY2018Q2	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	46188000	USD
CY2018Q3	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	47903000	USD
CY2018Q4	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	50911000	USD
CY2018	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	187142000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	59032000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	75427000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	91202000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Additional Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized	2211000	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	13512000	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	15386000	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	3097000	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	25.22
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	147600000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	307700000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	283800000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	49000	shares
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	113000	shares
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	23.66
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	40.17
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	121.18
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	1422637000	USD
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	1027741000	USD
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	7024000	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	5899000	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	33.05
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	37.09
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	32.24
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	49.53
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	241.92
CY2018Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	574392000	USD
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P4Y8M19D
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P6Y1M2D
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P5Y2M15D
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	1189000	shares
CY2018	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	15555000	USD
CY2016	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	35181000	USD
CY2017	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	57111000	USD
CY2018	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	53658000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	788152000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	1107820000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	1661914000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	2143389000	USD
CY2016	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	1224000	USD
CY2017	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	801000	USD
CY2018	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	189000	USD
CY2016	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	74000	USD
CY2017	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	68000	USD
CY2018	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	15000	USD
CY2016	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	0	USD
CY2017	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	0	USD
CY2018	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	-13800000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	22239000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	26900000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	26915000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	48835000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	48800000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	74436000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	74400000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	426000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	21000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	675000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	432000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	1000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	1900000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	400000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	900000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	0	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	706000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	11359000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	22202000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	27413000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	46000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1243000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	330000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	5871000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	1504000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	2173000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	13900000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	26800000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	35700000	USD
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	73222000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	78977000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	80844000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	68771000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	72258000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	74750000	shares
CY2018	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:8px;text-align:justify;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Financial instruments that potentially subject us to concentrations of credit risk consist primarily of cash, cash equivalents, marketable securities, restricted cash, and accounts receivable. Our cash equivalents, restricted cash and marketable securities are invested in high quality financial instruments with banks and financial institutions. Such deposits may be in excess of insured limits provided on such deposits. </font></div><div style="line-height:120%;padding-top:8px;text-align:justify;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Our accounts receivable are unsecured and represent amounts due to us based on contractual obligations of our customers. We mitigate credit risk in respect to accounts receivable by performing ongoing credit evaluations of our customers to assess the probability of accounts receivable collection based on a number of factors, including past transaction experience with the customer, evaluation of their credit history, the credit limits extended and review of the invoicing terms of the arrangement. In situations where a customer may be thinly capitalized and we have limited payment history with it, we will either establish a small credit limit or require it to prepay its purchases. We generally do not require our customers to provide collateral to support accounts receivable. We have recorded an allowance for doubtful accounts for those receivables that we have determined not to be collectible. We mitigate credit risk in respect to the notes receivable by performing ongoing credit evaluations of the borrower to assess the probability of collecting all amounts due to us under the existing contractual terms. </font></div><div style="line-height:120%;padding-top:8px;text-align:justify;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">We market and sell our products through both our direct sales force and our channel partners, including distributors, value-added resellers, system integrators and original equipment manufacturer (“OEM”) partners and in conjunction with various technology partners. Significant customers are those which represent more than </font><font style="font-family:inherit;font-size:10pt;">10%</font><font style="font-family:inherit;font-size:10pt;"> of our total net revenue during the period or net accounts receivable balance at each respective balance sheet date. As of December 31, 2018, we had </font><font style="font-family:inherit;font-size:10pt;">two</font><font style="font-family:inherit;font-size:10pt;"> customers who represented </font><font style="font-family:inherit;font-size:10pt;">35%</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:inherit;font-size:10pt;">10%</font><font style="font-family:inherit;font-size:10pt;"> of total accounts receivable, respectively. As of December 31, 2017, we had </font><font style="font-family:inherit;font-size:10pt;">two</font><font style="font-family:inherit;font-size:10pt;"> customers who represented </font><font style="font-family:inherit;font-size:10pt;">30%</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:inherit;font-size:10pt;">18%</font><font style="font-family:inherit;font-size:10pt;"> of total accounts receivable, respectively. For the years ended December 31, 2018, 2017 and 2016, there was one customer who represented </font><font style="font-family:inherit;font-size:10pt;">27%</font><font style="font-family:inherit;font-size:10pt;">, </font><font style="font-family:inherit;font-size:10pt;">16%</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:inherit;font-size:10pt;">16%</font><font style="font-family:inherit;font-size:10pt;"> of our total revenue, respectively.</font></div></div>
CY2018	us-gaap	Guarantees Indemnifications And Warranties Policies GuaranteesIndemnificationsAndWarrantiesPolicies	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:8px;text-align:justify;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">We offer a </font><font style="font-family:inherit;font-size:10pt;">one</font><font style="font-family:inherit;font-size:10pt;">-year warranty on all of our hardware products and a </font><font style="font-family:inherit;font-size:10pt;">90</font><font style="font-family:inherit;font-size:10pt;">-day warranty against defects in the software embedded in the products. We use judgment and estimates when determining warranty costs based on historical costs to replace product returns within the warranty period at the time we recognize revenue. We accrue for potential warranty claims at the time of shipment as a component of cost of revenues based on historical experience and other relevant information. We reserve for specifically identified products if and when we determine we have a systemic product failure. Although we engage in extensive product quality programs, if actual product failure rates or use of materials differ from estimates, additional warranty costs may be incurred, which could reduce our gross margin. The accrued warranty liability is recorded in accrued liabilities in the accompanying consolidated balance sheets. </font></div></div>
CY2018	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:8px;text-align:justify;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The preparation of the accompanying consolidated financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the amounts reported and disclosed in the consolidated financial statements and accompanying notes. Those estimates and assumptions include, but are not limited to, revenue recognition and deferred revenue; allowance for doubtful accounts, sales rebates and return reserves; valuation of goodwill and acquisition-related intangible assets, accounting for income taxes, including the valuation allowance on deferred tax assets and reserves for uncertain tax positions; estimate of useful lives of long-lived assets including intangible assets; valuation of inventory and contract manufacturer/supplier liabilities; recognition and measurement of contingent liabilities; valuation of equity investments in privately-held companies; determination of fair value for stock-based awards; and valuation of warranty accruals. We evaluate our estimates and assumptions based on historical experience and other factors and adjust those estimates and assumptions when facts and circumstances dictate. Actual results could differ materially from those estimates.</font></div></div>

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2018 Form 10-K Financial Statement

#000159653219000027 Filed on February 15, 2019

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$ANET Arista Networks, Inc. Stock $anet

2018 Form 10-K Financial Statement

#000159653219000027 Filed on February 15, 2019

Income Statement

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Files In Submission

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Arista Networks, Inc. Stock $anet