$ANET
Arista Networks, Inc. Stock $anet

$anet Overview Financials Valuation SEC Filings Company Website

2017 Q4 Form 10-K Financial Statement

#000159653218000018 Filed on February 20, 2018

Income Statement

Concept	2017 Q4	2017 Q3	2017 Q2
Revenue	$467.9M	$437.6M	$405.2M
YoY Change	42.66%	50.77%	50.78%
Cost Of Revenue	$160.7M	$157.0M	$145.4M
YoY Change	36.4%	51.21%	49.49%
Gross Profit	$307.2M	$280.6M	$259.8M
YoY Change	46.16%	50.53%	51.52%
Gross Profit Margin	65.65%	64.12%	64.11%
Selling, General & Admin	$60.60M	$60.18M	$61.95M
YoY Change	-1.09%	14.07%	25.73%
% of Gross Profit	19.73%	21.44%	23.85%
Research & Development	$107.2M	$79.61M	$81.19M
YoY Change	50.12%	12.69%	17.64%
% of Gross Profit	34.89%	28.37%	31.26%
Depreciation & Amortization	$5.200M	$5.200M	$5.000M
YoY Change	6.12%	1.96%	4.17%
% of Gross Profit	1.69%	1.85%	1.92%
Operating Expenses	$167.8M	$139.8M	$143.1M
YoY Change	26.47%	13.28%	21.01%
Operating Profit	$139.4M	$140.8M	$116.6M
YoY Change	79.87%	123.47%	119.41%
Interest Expense	-$700.0K	$701.0K	$623.0K
YoY Change	-22.22%	-200.14%	-189.0%
% of Operating Profit	-0.5%	0.5%	0.53%
Other Income/Expense, Net	$2.247M	$1.435M	$496.0K
YoY Change	-727.65%	-1594.79%	-256.96%
Pretax Income	$141.6M	$142.3M	$117.1M
YoY Change	83.61%	126.09%	121.66%
Income Tax	$37.80M	$8.545M	$14.45M
% Of Pretax Income	26.69%	6.01%	12.33%
Net Earnings	$103.8M	$133.7M	$102.7M
YoY Change	76.64%	160.89%	163.94%
Net Earnings / Revenue	22.19%	30.56%	25.34%
Basic Earnings Per Share	$1.42	$1.84	$1.42
Diluted Earnings Per Share	$1.29	$1.68	$1.30
COMMON SHARES
Basic Shares Outstanding	73.10M shares	72.59M shares	71.99M shares
Diluted Shares Outstanding		79.32M shares	78.76M shares

Balance Sheet

Concept	2017 Q4	2017 Q3	2017 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.536B	$1.343B	$1.125B
YoY Change	76.94%	67.86%	36.54%
Cash & Equivalents	$859.2M	$854.5M	$823.5M
Short-Term Investments	$676.4M	$488.6M	$301.4M
Other Short-Term Assets	$96.22M	$126.2M	$124.4M
YoY Change	21.58%	127.93%	352.01%
Inventory	$306.2M	$333.2M	$363.8M
Prepaid Expenses
Receivables	$247.3M	$212.6M	$269.6M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$2.266B	$2.076B	$1.949B
YoY Change	48.51%	56.74%	70.67%
LONG-TERM ASSETS
Property, Plant & Equipment	$74.28M	$73.06M	$75.84M
YoY Change	-3.48%	-6.51%	-4.82%
Goodwill	$0.00
YoY Change
Intangibles
YoY Change
Long-Term Investments	$36.10M	$36.10M	$36.10M
YoY Change	0.0%	0.0%	-7.67%
Other Assets	$18.89M	$21.28M	$20.31M
YoY Change	0.36%	15.65%	7.94%
Total Long-Term Assets	$194.4M	$226.2M	$213.8M
YoY Change	-4.17%	16.04%	10.79%
TOTAL ASSETS
Total Short-Term Assets	$2.266B	$2.076B	$1.949B
Total Long-Term Assets	$194.4M	$226.2M	$213.8M
Total Assets	$2.461B	$2.302B	$2.163B
YoY Change	42.33%	51.52%	62.02%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$52.20M	$32.89M	$80.42M
YoY Change	-34.3%	-57.31%	33.81%
Accrued Expenses	$133.8M	$94.46M	$84.41M
YoY Change	47.14%	22.41%	53.17%
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	$529.9M	$567.5M	$610.8M
YoY Change	15.31%	59.84%	131.86%
LONG-TERM LIABILITIES
Long-Term Debt	$37.70M	$38.20M	$38.70M
YoY Change	-4.8%	-4.5%	-4.21%
Other Long-Term Liabilities	$9.745M	$7.811M	$7.992M
YoY Change	22.46%	13.2%	18.33%
Total Long-Term Liabilities	$9.745M	$7.811M	$7.992M
YoY Change	22.46%	13.2%	18.33%
TOTAL LIABILITIES
Total Short-Term Liabilities	$529.9M	$567.5M	$610.8M
Total Long-Term Liabilities	$9.745M	$7.811M	$7.992M
Total Liabilities	$798.9M	$777.2M	$805.2M
YoY Change	28.62%	53.09%	92.56%
SHAREHOLDERS EQUITY
Retained Earnings	$859.1M	$755.3M	$621.6M
YoY Change	97.45%	100.7%	91.21%
Common Stock	$7.000K	$7.000K	$7.000K
YoY Change	0.0%	0.0%	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.662B	$1.525B	$1.358B
YoY Change
Total Liabilities & Shareholders Equity	$2.461B	$2.302B	$2.163B
YoY Change	42.33%	51.52%	62.02%

Cashflow Statement

Concept	2017 Q4	2017 Q3	2017 Q2
OPERATING ACTIVITIES
Net Income	$103.8M	$133.7M	$102.7M
YoY Change	76.64%	160.89%	163.94%
Depreciation, Depletion And Amortization	$5.200M	$5.200M	$5.000M
YoY Change	6.12%	1.96%	4.17%
Cash From Operating Activities	$183.6M	$205.9M	$79.20M
YoY Change	179.88%	-718.32%	22.03%
INVESTING ACTIVITIES
Capital Expenditures	-$3.100M	-$2.700M	-$4.900M
YoY Change	-36.73%	-28.95%	19.51%
Acquisitions
YoY Change
Other Investing Activities	-$189.1M	-$184.8M	-$5.100M
YoY Change	14446.15%	2300.0%	-97.91%
Cash From Investing Activities	-$192.2M	-$187.4M	-$10.00M
YoY Change	3000.0%	1543.86%	-95.97%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	13.30M	12.20M	7.500M
YoY Change	54.65%	-13.48%	108.33%
NET CHANGE
Cash From Operating Activities	183.6M	205.9M	79.20M
Cash From Investing Activities	-192.2M	-187.4M	-10.00M
Cash From Financing Activities	13.30M	12.20M	7.500M
Net Change In Cash	4.700M	30.70M	76.70M
YoY Change	-93.09%	-200.33%	-142.75%
FREE CASH FLOW
Cash From Operating Activities	$183.6M	$205.9M	$79.20M
Capital Expenditures	-$3.100M	-$2.700M	-$4.900M
Free Cash Flow	$186.7M	$208.6M	$84.10M
YoY Change	164.82%	-807.12%	21.88%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2016Q4	anet	Accrued Manufacturing Costs Current AccruedManufacturingCostsCurrent	14824000	USD
CY2017Q4	anet	Accrued Manufacturing Costs Current AccruedManufacturingCostsCurrent	35703000	USD
CY2016Q4	anet	Accrued Product Development Costs Current AccruedProductDevelopmentCostsCurrent	7103000	USD
CY2017Q4	anet	Accrued Product Development Costs Current AccruedProductDevelopmentCostsCurrent	21201000	USD
CY2015	anet	Adjustmentsto Additional Paidin Capital Vestingof Early Exercised Stock Options AdjustmentstoAdditionalPaidinCapitalVestingofEarlyExercisedStockOptions	2226000	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
CY2015	anet	Adjustmentsto Additional Paidin Capital Vestingof Stock Optionsand Restricted Stock AdjustmentstoAdditionalPaidinCapitalVestingofStockOptionsandRestrictedStock	2226000	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
CY2016Q4	anet	Allowancefor Doubtful Accountsand Product Sales Return Reserve AllowanceforDoubtfulAccountsandProductSalesReturnReserve	1521000	USD
CY2017Q4	anet	Allowancefor Doubtful Accountsand Product Sales Return Reserve AllowanceforDoubtfulAccountsandProductSalesReturnReserve	7535000	USD
CY2017Q4	anet	Available For Sale Securities Debt Maturities One Yearto Two Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesOneYeartoTwoYearsFairValue	289857000	USD
CY2017	anet	Availablefor Sale Securities Maximum Maturity AvailableforSaleSecuritiesMaximumMaturity	P2Y
CY2017	anet	Availablefor Sale Securities Weighted Average Remaining Duration AvailableforSaleSecuritiesWeightedAverageRemainingDuration	P10M24D
CY2015	anet	Contract Manufacturerand Supplier Liability ContractManufacturerandSupplierLiability	3900000	USD
CY2016	anet	Contract Manufacturerand Supplier Liability ContractManufacturerandSupplierLiability	6200000	USD
CY2017	anet	Contract Manufacturerand Supplier Liability ContractManufacturerandSupplierLiability	21200000	USD
CY2017Q1	anet	Effective Income Tax Rate Reconciliation Sharebased Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount	28800000	USD
CY2017Q2	anet	Effective Income Tax Rate Reconciliation Sharebased Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount	19100000	USD
CY2017Q3	anet	Effective Income Tax Rate Reconciliation Sharebased Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount	23800000	USD
CY2017Q4	anet	Effective Income Tax Rate Reconciliation Sharebased Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount	38300000	USD
CY2017	anet	Effective Income Tax Rate Reconciliation Sharebased Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount	110000000	USD
CY2015	anet	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Percent	0.0000
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
CY2015	anet	Effective Income Tax Rate Reconciliation Uncertain Tax Positionsand Associated Interest Percent EffectiveIncomeTaxRateReconciliationUncertainTaxPositionsandAssociatedInterestPercent	-0.0395
CY2016	anet	Effective Income Tax Rate Reconciliation Uncertain Tax Positionsand Associated Interest Percent EffectiveIncomeTaxRateReconciliationUncertainTaxPositionsandAssociatedInterestPercent	-0.0146
CY2017	anet	Effective Income Tax Rate Reconciliation Uncertain Tax Positionsand Associated Interest Percent EffectiveIncomeTaxRateReconciliationUncertainTaxPositionsandAssociatedInterestPercent	0.0077
CY2015	anet	Incremental Common Shares Attributableto Dilutive Effectof Employee Stock Purchase Plan IncrementalCommonSharesAttributabletoDilutiveEffectofEmployeeStockPurchasePlan	84000	shares
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
CY2015	anet	Interest Expense Excluding Related Party InterestExpenseExcludingRelatedParty	3152000	USD
CY2016Q1	anet	Interest Expense Excluding Related Party InterestExpenseExcludingRelatedParty	751000	USD
CY2016Q2	anet	Interest Expense Excluding Related Party InterestExpenseExcludingRelatedParty	732000	USD
CY2016Q3	anet	Interest Expense Excluding Related Party InterestExpenseExcludingRelatedParty	735000	USD
CY2016Q4	anet	Interest Expense Excluding Related Party InterestExpenseExcludingRelatedParty	918000	USD
CY2016	anet	Interest Expense Excluding Related Party InterestExpenseExcludingRelatedParty	3136000	USD
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
CY2017	anet	Interest Expense Excluding Related Party InterestExpenseExcludingRelatedParty	2780000	USD
CY2015	anet	Interest Paid Lease Financing Obligation InterestPaidLeaseFinancingObligation	2999000	USD
CY2016	anet	Interest Paid Lease Financing Obligation InterestPaidLeaseFinancingObligation	2916000	USD
CY2017	anet	Interest Paid Lease Financing Obligation InterestPaidLeaseFinancingObligation	2814000	USD
CY2016Q4	anet	Inventory Deposit Current InventoryDepositCurrent	60315000	USD
CY2017Q4	anet	Inventory Deposit Current InventoryDepositCurrent	34141000	USD
CY2016Q4	anet	Lease Financing Obligation LeaseFinancingObligation	41200000	USD
CY2017Q4	anet	Lease Financing Obligation LeaseFinancingObligation	39600000	USD
CY2017Q4	anet	Lease Financing Obligation Current LeaseFinancingObligationCurrent	1900000	USD
CY2017Q4	anet	Lease Financing Obligation Future Minimum Payments Due LeaseFinancingObligationFutureMinimumPaymentsDue	37692000	USD
CY2017Q4	anet	Lease Financing Obligation Future Minimum Payments Due Next Twelve Months LeaseFinancingObligationFutureMinimumPaymentsDueNextTwelveMonths	6113000	USD
CY2017Q4	anet	Lease Financing Obligation Future Minimum Payments Due Thereafter LeaseFinancingObligationFutureMinimumPaymentsDueThereafter	5264000	USD
CY2017Q4	anet	Lease Financing Obligation Future Minimum Payments Duein Five Years LeaseFinancingObligationFutureMinimumPaymentsDueinFiveYears	6871000	USD
CY2017Q4	anet	Lease Financing Obligation Future Minimum Payments Duein Four Years LeaseFinancingObligationFutureMinimumPaymentsDueinFourYears	6674000	USD
CY2017Q4	anet	Lease Financing Obligation Future Minimum Payments Duein Three Years LeaseFinancingObligationFutureMinimumPaymentsDueinThreeYears	6477000	USD
CY2017Q4	anet	Lease Financing Obligation Future Minimum Payments Duein Two Years LeaseFinancingObligationFutureMinimumPaymentsDueinTwoYears	6293000	USD
CY2017Q4	anet	Lease Financing Obligation Future Minimum Payments Interestand Land Lease Expense Includedin Payments LeaseFinancingObligationFutureMinimumPaymentsInterestandLandLeaseExpenseIncludedinPayments	21730000	USD
CY2017Q4	anet	Lease Financing Obligation Future Minimum Payments Net Minimum Payments LeaseFinancingObligationFutureMinimumPaymentsNetMinimumPayments	15962000	USD
CY2017Q4	anet	Lease Financing Obligation Future Minimum Payments Present Valueof Net Minimum Payments LeaseFinancingObligationFutureMinimumPaymentsPresentValueofNetMinimumPayments	39592000	USD
CY2016Q4	anet	Lease Financing Obligation Noncurrent LeaseFinancingObligationNoncurrent	39593000	USD
CY2017Q4	anet	Lease Financing Obligation Noncurrent LeaseFinancingObligationNoncurrent	37700000	USD
CY2017Q4	anet	Lease Financing Obligation Noncurrent LeaseFinancingObligationNoncurrent	37673000	USD
CY2017Q4	anet	Lease Financing Obligation Property Revertingto Landlord LeaseFinancingObligationPropertyRevertingtoLandlord	23630000	USD
CY2017Q4	anet	Lease Financing Obligations Current LeaseFinancingObligationsCurrent	1919000	USD
CY2013Q3	anet	Lessee Leasing Arrangements Financing Obligation Termof Contract LesseeLeasingArrangementsFinancingObligationTermofContract	P120M
CY2015	anet	Proceedsfrom Issuance Initial Public Offering Netof Offering Costs ProceedsfromIssuanceInitialPublicOfferingNetofOfferingCosts	-261000	USD
CY2016	anet	Proceedsfrom Issuance Initial Public Offering Netof Offering Costs ProceedsfromIssuanceInitialPublicOfferingNetofOfferingCosts	0	USD
CY2017	anet	Proceedsfrom Issuance Initial Public Offering Netof Offering Costs ProceedsfromIssuanceInitialPublicOfferingNetofOfferingCosts	0	USD
CY2014Q4	anet	Product Return Reserve Current ProductReturnReserveCurrent	2031000	USD
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
CY2015	anet	Repaymentsof Longterm Lease Financing Obligations RepaymentsofLongtermLeaseFinancingObligations	1086000	USD
CY2016	anet	Repaymentsof Longterm Lease Financing Obligations RepaymentsofLongtermLeaseFinancingObligations	1336000	USD
CY2017	anet	Repaymentsof Longterm Lease Financing Obligations RepaymentsofLongtermLeaseFinancingObligations	1617000	USD
CY2015	anet	Sales Return Reserve Chargedto Revenue SalesReturnReserveChargedtoRevenue	818000	USD
CY2016	anet	Sales Return Reserve Chargedto Revenue SalesReturnReserveChargedtoRevenue	5122000	USD
CY2017	anet	Sales Return Reserve Chargedto Revenue SalesReturnReserveChargedtoRevenue	17371000	USD
CY2017	anet	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Shares Traded For Taxes ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSharesTradedForTaxes	23000	shares
CY2016	anet	Specific Product Warranty Accrual Warranties Issued SpecificProductWarrantyAccrualWarrantiesIssued	0	USD
CY2017	anet	Specific Product Warranty Accrual Warranties Issued SpecificProductWarrantyAccrualWarrantiesIssued	0	USD
CY2017	anet	Tax Cuts And Jobs Act Of2017 Incomplete Accounting Change In Tax Rate Provisional Income Tax Expense Benefit TaxCutsAndJobsActOf2017IncompleteAccountingChangeInTaxRateProvisionalIncomeTaxExpenseBenefit	33000000	USD
CY2017Q4	anet	Tax Cuts And Jobs Act Of2017 Incomplete Accounting Provisional Income Tax Expense Benefit TaxCutsAndJobsActOf2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefit	51800000	USD
CY2017	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	Warranty Termon Hardware Products WarrantyTermonHardwareProducts	P1Y
CY2017	anet	Warranty Termon Software Embeddedin Products WarrantyTermonSoftwareEmbeddedinProducts	P90D
CY2017	dei	Amendment Flag AmendmentFlag	false
CY2017	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2017	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2017	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2017
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2017	dei	Document Type DocumentType	10-K
CY2017	dei	Entity Central Index Key EntityCentralIndexKey	0001596532
CY2018Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	73875377	shares
CY2017	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2017	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2017Q2	dei	Entity Public Float EntityPublicFloat	8052073793	USD
CY2017	dei	Entity Registrant Name EntityRegistrantName	Arista Networks, Inc.
CY2017	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2017	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2017	dei	Trading Symbol TradingSymbol	ANET
CY2016Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	79457000	USD
CY2017Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	52200000	USD
CY2016Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	254640000	USD
CY2017Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	254881000	USD
CY2016Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	253119000	USD
CY2017Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	247346000	USD
CY2016Q4	us-gaap	Accrued Income Taxes AccruedIncomeTaxes	1098000	USD
CY2017Q4	us-gaap	Accrued Income Taxes AccruedIncomeTaxes	794000	USD
CY2016Q4	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	14498000	USD
CY2017Q4	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	34067000	USD
CY2016Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	90951000	USD
CY2017Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	133827000	USD
CY2016Q4	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	6829000	USD
CY2017Q4	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	7086000	USD
CY2016Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	49132000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	69020000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1475000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1938000	USD
CY2016Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	674183000	USD
CY2017Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	804731000	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
CY2015	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	45303000	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
CY2015	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	37000000	USD
CY2015	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	37003000	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
CY2015	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	45303000	USD
CY2016	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	59032000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	75427000	USD
CY2014Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1063000	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
CY2016Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	204000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	112000	USD
CY2015	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	435000	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
CY2016Q4	us-gaap	Assets Assets	1729007000	USD
CY2017Q4	us-gaap	Assets Assets	2460860000	USD
CY2016Q4	us-gaap	Assets Current AssetsCurrent	1526126000	USD
CY2017Q4	us-gaap	Assets Current AssetsCurrent	2266429000	USD
CY2016Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	114000	USD
CY2017Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	22000	USD
CY2016Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	566000	USD
CY2017Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1611000	USD
CY2016Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	300362000	USD
CY2017Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	677952000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	386506000	USD
CY2016Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	299910000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	676363000	USD
CY2016Q4	us-gaap	Available For Sale Securities Debt Securities Current AvailableForSaleSecuritiesDebtSecuritiesCurrent	299910000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Securities Current AvailableForSaleSecuritiesDebtSecuritiesCurrent	676363000	USD
CY2015	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	3957000	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
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	240031000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	687326000	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
CY2015	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	447295000	USD
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-119403000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	291269000	USD
CY2016Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2017Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2016Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2016Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000	shares
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000	shares
CY2016Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	70811000	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	73706000	shares
CY2016Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	70811000	shares
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	73706000	shares
CY2016Q4	us-gaap	Common Stock Value CommonStockValue	7000	USD
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	7000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	120761000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	183389000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	422738000	USD
CY2016Q4	us-gaap	Cost Method Investments CostMethodInvestments	36100000	USD
CY2017Q4	us-gaap	Cost Method Investments CostMethodInvestments	36100000	USD
CY2015	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	294031000	USD
CY2016	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	406051000	USD
CY2017	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	584417000	USD
CY2015	us-gaap	Cost Of Goods Sold CostOfGoodsSold	263585000	USD
CY2016Q1	us-gaap	Cost Of Goods Sold CostOfGoodsSold	78913000	USD
CY2016Q2	us-gaap	Cost Of Goods Sold CostOfGoodsSold	88021000	USD
CY2016Q3	us-gaap	Cost Of Goods Sold CostOfGoodsSold	94777000	USD
CY2016Q4	us-gaap	Cost Of Goods Sold CostOfGoodsSold	108057000	USD
CY2016	us-gaap	Cost Of Goods Sold CostOfGoodsSold	369768000	USD
CY2017Q1	us-gaap	Cost Of Goods Sold CostOfGoodsSold	109836000	USD
CY2017Q2	us-gaap	Cost Of Goods Sold CostOfGoodsSold	134406000	USD
CY2017Q3	us-gaap	Cost Of Goods Sold CostOfGoodsSold	145874000	USD
CY2017Q4	us-gaap	Cost Of Goods Sold CostOfGoodsSold	147919000	USD
CY2017	us-gaap	Cost Of Goods Sold CostOfGoodsSold	538035000	USD
CY2016Q1	us-gaap	Cost Of Revenue CostOfRevenue	87106000	USD
CY2016Q2	us-gaap	Cost Of Revenue CostOfRevenue	97290000	USD
CY2016Q3	us-gaap	Cost Of Revenue CostOfRevenue	103841000	USD
CY2016Q4	us-gaap	Cost Of Revenue CostOfRevenue	117814000	USD
CY2017Q1	us-gaap	Cost Of Revenue CostOfRevenue	121265000	USD
CY2017Q2	us-gaap	Cost Of Revenue CostOfRevenue	145434000	USD
CY2017Q3	us-gaap	Cost Of Revenue CostOfRevenue	157016000	USD
CY2017Q4	us-gaap	Cost Of Revenue CostOfRevenue	160702000	USD
CY2015	us-gaap	Cost Of Services CostOfServices	30446000	USD
CY2016Q1	us-gaap	Cost Of Services CostOfServices	8193000	USD
CY2016Q2	us-gaap	Cost Of Services CostOfServices	9269000	USD
CY2016Q3	us-gaap	Cost Of Services CostOfServices	9064000	USD
CY2016Q4	us-gaap	Cost Of Services CostOfServices	9757000	USD
CY2016	us-gaap	Cost Of Services CostOfServices	36283000	USD
CY2017Q1	us-gaap	Cost Of Services CostOfServices	11429000	USD
CY2017Q2	us-gaap	Cost Of Services CostOfServices	11028000	USD
CY2017Q3	us-gaap	Cost Of Services CostOfServices	11142000	USD
CY2017Q4	us-gaap	Cost Of Services CostOfServices	12783000	USD
CY2017	us-gaap	Cost Of Services CostOfServices	46382000	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
CY2017	us-gaap	Costmethod Investments Other Than Temporary Impairment CostmethodInvestmentsOtherThanTemporaryImpairment	0	USD
CY2016Q4	us-gaap	Cumulative Effect Of New Accounting Principle In Period Of Adoption CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	2279000	USD
CY2015	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	43706000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	67253000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	36862000	USD
CY2015	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1588000	USD
CY2016	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	2016000	USD
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	2395000	USD
CY2015	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	50794000	USD
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	79798000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	42902000	USD
CY2015	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	5500000	USD
CY2015	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-23896000	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
CY2015	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	309000	USD
CY2016	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	381000	USD
CY2017	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-734000	USD
CY2016Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	70960000	USD
CY2017Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	65125000	USD
CY2015	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-24409000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-21720000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	8426000	USD
CY2016Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	2756000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	2015000	USD
CY2015	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-25887000	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
CY2016Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	273350000	USD
CY2017Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	327706000	USD
CY2016Q4	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	99585000	USD
CY2017Q4	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	187556000	USD
CY2015	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-2300000	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
CY2016Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	89329000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	100394000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	69679000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	63247000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	70960000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	65125000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	72435000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	65262000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	1140000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	2432000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	194000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	2115000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	473000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	1942000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	15015000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	30831000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	23071000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	22050000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	49436000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	41024000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	16894000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	35132000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Reserves And Accruals DeferredTaxLiabilitiesDeferredExpenseReservesAndAccruals	2555000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Reserves And Accruals DeferredTaxLiabilitiesDeferredExpenseReservesAndAccruals	2006000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	1281000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	1878000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	3000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	9000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	198000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	0	USD
CY2015	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	0	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
CY2017	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.03
CY2017	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	1
CY2015	us-gaap	Depreciation Depreciation	13400000	USD
CY2016	us-gaap	Depreciation Depreciation	19400000	USD
CY2017	us-gaap	Depreciation Depreciation	20200000	USD
CY2015	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	13671000	USD
CY2016	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	19749000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	20640000	USD
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.81
CY2016Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.52
CY2016Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.57
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.74
CY2016Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.84
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
CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.67
CY2016Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.48
CY2016Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.53
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.69
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.35
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	0.0132
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.29
CY2016Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.79
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
CY2015	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-513000	USD
CY2016	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-464000	USD
CY2017	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	753000	USD
CY2015	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.1706
CY2016	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.2396
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.1086
CY2015	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
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
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.0284
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.0171
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.0195
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.0216
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.0324
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.0762
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	0.0102
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	0.0110
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.0529
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	0.2374
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.0001
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.0005
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.0000
CY2015	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.0135
CY2016	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.0003
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.0170
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.0672
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.0424
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.0384
CY2016Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	52854000	USD
CY2017Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	56626000	USD
CY2017Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	67600000	USD
CY2015	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	-500000	USD
CY2016	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	-700000	USD
CY2017	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	-500000	USD
CY2015	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	75720000	USD
CY2016Q1	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	15234000	USD
CY2016Q2	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	17529000	USD
CY2016Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	19535000	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
CY2015	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	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
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	129240000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	196202000	USD
CY2016Q4	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	22941000	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
CY2015	us-gaap	Gross Profit GrossProfit	543560000	USD
CY2016Q1	us-gaap	Gross Profit GrossProfit	155090000	USD
CY2016Q2	us-gaap	Gross Profit GrossProfit	171451000	USD
CY2016Q3	us-gaap	Gross Profit GrossProfit	186420000	USD
CY2016Q4	us-gaap	Gross Profit GrossProfit	210155000	USD
CY2016	us-gaap	Gross Profit GrossProfit	723116000	USD
CY2017Q1	us-gaap	Gross Profit GrossProfit	214210000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	373221000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	146009000	USD
CY2016Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	49321000	USD
CY2016Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	52842000	USD
CY2016Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	62925000	USD
CY2016Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	77137000	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
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	16769000	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
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	24907000	USD
CY2016Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14076000	USD
CY2016Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13938000	USD
CY2016Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11668000	USD
CY2016Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	18354000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	58036000	USD
CY2017Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-9233000	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
CY2015	us-gaap	Income Taxes Paid IncomeTaxesPaid	6591000	USD
CY2016	us-gaap	Income Taxes Paid IncomeTaxesPaid	39638000	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	44216000	USD
CY2015	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	9037000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	38678000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-30104000	USD
CY2015	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	47281000	USD
CY2016	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	108856000	USD
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-5773000	USD
CY2015	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	32018000	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
CY2015	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	20398000	USD
CY2016	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	30629000	USD
CY2017	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	43535000	USD
CY2015	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	90340000	USD
CY2016	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	176126000	USD
CY2017	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	142327000	USD
CY2015	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	14123000	USD
CY2016	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	144361000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	69708000	USD
CY2015	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	3087000	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
CY2015	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	1171000	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
CY2015	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	7827000	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
CY2015	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	4041000	USD
CY2016	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	204000	USD
CY2017	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	1260000	USD
CY2015	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	5363000	shares
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
CY2016Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	137300000	USD
CY2017Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	236525000	USD
CY2016Q4	us-gaap	Inventory Net InventoryNet	236490000	USD
CY2017Q4	us-gaap	Inventory Net InventoryNet	306198000	USD
CY2016Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	99190000	USD
CY2017Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	69673000	USD
CY2015	us-gaap	Inventory Write Down InventoryWriteDown	9000000	USD
CY2016	us-gaap	Inventory Write Down InventoryWriteDown	12100000	USD
CY2017	us-gaap	Inventory Write Down InventoryWriteDown	28100000	USD
CY2015	us-gaap	Investment Income Amortization Of Premium InvestmentIncomeAmortizationOfPremium	1471000	USD
CY2016	us-gaap	Investment Income Amortization Of Premium InvestmentIncomeAmortizationOfPremium	1493000	USD
CY2017	us-gaap	Investment Income Amortization Of Premium InvestmentIncomeAmortizationOfPremium	1452000	USD
CY2015	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	5400000	USD
CY2016	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	8100000	USD
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	9400000	USD
CY2016Q4	us-gaap	Liabilities Liabilities	621187000	USD
CY2017Q4	us-gaap	Liabilities Liabilities	798946000	USD
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1729007000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2460860000	USD
CY2016Q4	us-gaap	Liabilities Current LiabilitiesCurrent	459553000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	529905000	USD
CY2016Q4	us-gaap	Long Term Investments And Receivables Net LongTermInvestmentsAndReceivablesNet	36136000	USD
CY2017Q4	us-gaap	Long Term Investments And Receivables Net LongTermInvestmentsAndReceivablesNet	36136000	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	25854000	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
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	184170000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-325979000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-392580000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	237784000	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
CY2015	us-gaap	Net Income Loss NetIncomeLoss	121102000	USD
CY2016Q1	us-gaap	Net Income Loss NetIncomeLoss	35245000	USD
CY2016Q2	us-gaap	Net Income Loss NetIncomeLoss	38904000	USD
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	51257000	USD
CY2016Q4	us-gaap	Net Income Loss NetIncomeLoss	58783000	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
CY2015	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	119115000	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
CY2015	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	119264000	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
CY2015	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-3299000	USD
CY2016Q1	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-414000	USD
CY2016Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-316000	USD
CY2016Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-96000	USD
CY2016Q4	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-358000	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
CY2017	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	1	segment
CY2017	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2015	us-gaap	Operating Expenses OperatingExpenses	394252000	USD
CY2016Q1	us-gaap	Operating Expenses OperatingExpenses	105355000	USD
CY2016Q2	us-gaap	Operating Expenses OperatingExpenses	118293000	USD
CY2016Q3	us-gaap	Operating Expenses OperatingExpenses	123399000	USD
CY2016Q4	us-gaap	Operating Expenses OperatingExpenses	132660000	USD
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
CY2015	us-gaap	Operating Income Loss OperatingIncomeLoss	149308000	USD
CY2016Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	49735000	USD
CY2016Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	53158000	USD
CY2016Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	63021000	USD
CY2016Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	77495000	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
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	51004000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	9127000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	7577000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	7741000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	8350000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	8336000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	9873000	USD
CY2016Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	1499000	USD
CY2017Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	5002000	USD
CY2016Q4	us-gaap	Other Assets Current OtherAssetsCurrent	79140000	USD
CY2017Q4	us-gaap	Other Assets Current OtherAssetsCurrent	96215000	USD
CY2017Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	16172000	USD
CY2016Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	7958000	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	9745000	USD
CY2015	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	0	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
CY2015	us-gaap	Payments To Acquire Businesses And Interest In Affiliates PaymentsToAcquireBusinessesAndInterestInAffiliates	0	USD
CY2016	us-gaap	Payments To Acquire Businesses And Interest In Affiliates PaymentsToAcquireBusinessesAndInterestInAffiliates	2500000	USD
CY2017	us-gaap	Payments To Acquire Businesses And Interest In Affiliates PaymentsToAcquireBusinessesAndInterestInAffiliates	0	USD
CY2015	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	0	USD
CY2016	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	439711000	USD
CY2016Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	18824000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	18891000	USD
CY2015	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-494000	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
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-341000	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
CY2015	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	153000	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
CY2016Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	15795000	USD
CY2015	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-147000	USD
CY2016Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	337000	USD
CY2016Q2	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	416000	USD
CY2016Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	639000	USD
CY2016Q4	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	560000	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
CY2016Q4	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	11846000	USD
CY2017Q4	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	8840000	USD
CY2016	us-gaap	Other Than Temporary Impairment Losses Investments Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities	0	USD
CY2017	us-gaap	Other Than Temporary Impairment Losses Investments Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities	0	USD
CY2017	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	585373000	USD
CY2015	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	19989000	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
CY2016Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.0001
CY2017Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.0001
CY2016Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	100000000	shares
CY2017Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	100000000	shares
CY2016Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2017Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2016Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2017Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2016Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2017Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2016Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	168684000	USD
CY2017Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	177330000	USD
CY2016Q4	us-gaap	Prepaid Taxes PrepaidTaxes	17383000	USD
CY2017Q4	us-gaap	Prepaid Taxes PrepaidTaxes	38134000	USD
CY2015	us-gaap	Proceeds From Collection Of Notes Receivable ProceedsFromCollectionOfNotesReceivable	0	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
CY2015	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	27201000	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
CY2015	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	208200000	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
CY2015Q4	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	4718000	USD
CY2016Q4	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	6744000	USD
CY2017Q4	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	7415000	USD
CY2016	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	3395000	USD
CY2017	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	4871000	USD
CY2016	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	5421000	USD
CY2017	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	5542000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	126093000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	143299000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	76961000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	74279000	USD
CY2015	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	335000	USD
CY2016	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	-292000	USD
CY2017	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	17000	USD
CY2017Q4	us-gaap	Purchase Commitment Remaining Minimum Amount Committed PurchaseCommitmentRemainingMinimumAmountCommitted	195100000	USD
CY2015	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	209448000	USD
CY2016Q1	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	62515000	USD
CY2016Q2	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	69020000	USD
CY2016Q3	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	70648000	USD
CY2016Q4	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	71398000	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
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	435105000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	859114000	USD
CY2015	us-gaap	Sales Returns Goods SalesReturnsGoods	2283000	USD
CY2016	us-gaap	Sales Returns Goods SalesReturnsGoods	4371000	USD
CY2017	us-gaap	Sales Returns Goods SalesReturnsGoods	11265000	USD
CY2015	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	744877000	USD
CY2016Q1	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	212475000	USD
CY2016Q2	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	235616000	USD
CY2016Q3	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	254238000	USD
CY2016Q4	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	289008000	USD
CY2016	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	991337000	USD
CY2017Q1	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	291367000	USD
CY2017Q2	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	353904000	USD
CY2017Q3	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	380344000	USD
CY2017Q4	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	407195000	USD
CY2017	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	1432810000	USD
CY2015	us-gaap	Sales Revenue Net SalesRevenueNet	837591000	USD
CY2016Q1	us-gaap	Sales Revenue Net SalesRevenueNet	242196000	USD
CY2016Q2	us-gaap	Sales Revenue Net SalesRevenueNet	268741000	USD
CY2016Q3	us-gaap	Sales Revenue Net SalesRevenueNet	290261000	USD
CY2016Q4	us-gaap	Sales Revenue Net SalesRevenueNet	327969000	USD
CY2016	us-gaap	Sales Revenue Net SalesRevenueNet	1129167000	USD
CY2017Q1	us-gaap	Sales Revenue Net SalesRevenueNet	335475000	USD
CY2017Q2	us-gaap	Sales Revenue Net SalesRevenueNet	405211000	USD
CY2017Q3	us-gaap	Sales Revenue Net SalesRevenueNet	437633000	USD
CY2017Q4	us-gaap	Sales Revenue Net SalesRevenueNet	467867000	USD
CY2017	us-gaap	Sales Revenue Net SalesRevenueNet	1646186000	USD
CY2015	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	92714000	USD
CY2016Q1	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	29721000	USD
CY2016Q2	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	33125000	USD
CY2016Q3	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	36023000	USD
CY2016Q4	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	38961000	USD
CY2016	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	137830000	USD
CY2017Q1	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	44108000	USD
CY2017Q2	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	51307000	USD
CY2017Q3	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	57289000	USD
CY2017Q4	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	60672000	USD
CY2017	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	213376000	USD
CY2015	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	109084000	USD
CY2016Q1	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	27606000	USD
CY2016Q2	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	31744000	USD
CY2016Q3	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	33216000	USD
CY2016Q4	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	38321000	USD
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
CY2017Q3	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	40640000	USD
CY2017Q4	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	38808000	USD
CY2017	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	155105000	USD
CY2015	us-gaap	Share Based Compensation ShareBasedCompensation	45303000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	59032000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	75427000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Additional Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized	2124000	shares
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	11754000	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	13512000	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	2992000	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	20.70
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	152400000	USD
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
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	395000	shares
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	399000	shares
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	170000	shares
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	29.20
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
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	646394000	USD
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	1422637000	USD
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	9509000	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	7024000	shares
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	28.79
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	33.05
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue	1422637000	USD
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	7024000	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	33.05
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	19.73
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	34.04
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	96.60
CY2017Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	643012000	USD
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P5Y5M8D
CY2016	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P6Y11M1D
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P6Y1M2D
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1	P6Y1M2D
CY2017	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	2260000	shares
CY2015	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	27201000	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
CY2014Q4	us-gaap	Stockholders Equity StockholdersEquity	555658000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	788152000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	1107820000	USD
CY2017Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	82300000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	5871000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	1661914000	USD
CY2015	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	1987000	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
CY2015	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	149000	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
CY2015Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	16400000	USD
CY2016Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	36400000	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	21322000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	22239000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	22200000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	26915000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	26900000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	48835000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	48800000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	228000	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
CY2015	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	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
CY2016Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	600000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	1000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	500000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	400000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	7385000	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
CY2015	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	346000	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
CY2015	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	6586000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	1504000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	13000000	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	23500000	USD
CY2016	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	4200000	USD
CY2017	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	18200000	USD
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	71411000	shares
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
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	65964000	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
CY2017	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, 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, 2017, we had two 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. As of December 31, 2016, we had one customer who represented </font><font style="font-family:inherit;font-size:10pt;">36%</font><font style="font-family:inherit;font-size:10pt;"> of total accounts receivable. For the year ended December 31, 2017, 2016 and 2015, there was one customer who represented </font><font style="font-family:inherit;font-size:10pt;">16%</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;">12%</font><font style="font-family:inherit;font-size:10pt;"> of our total revenue, respectively.</font></div></div>
CY2017	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>
CY2017	us-gaap	Revenue Recognition Multiple Element Arrangements RevenueRecognitionMultipleElementArrangements	<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;">Most of our arrangements, other than renewals of PCS, are multiple element arrangements with a combination of products and PCS. Products and PCS generally qualify as separate units of accounting. Our hardware deliverables include EOS software, which together deliver the essential functionality of our products. For multiple element arrangements, we allocate revenue to each unit of accounting based on the relative selling price. The relative selling price for each element is based upon the following hierarchy: vendor-specific objective evidence (“VSOE”), if available; third-party evidence (“TPE”), if VSOE is not available; and best estimate of selling price (“BESP”), if neither VSOE nor TPE is available. As we have not been able to establish VSOE or TPE for our products and most of our services, we generally utilize BESP for the purposes of allocating revenue to each unit of accounting. </font></div><table cellpadding="0" cellspacing="0" style="padding-top:4px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:54px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:10pt;padding-left:36px;"><font style="font-family:inherit;font-size:10pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">VSOE</font><font style="font-family:inherit;font-size:10pt;">—We determine VSOE based on our historical pricing and discounting practices for the specific products and services when sold separately. In determining VSOE, we require that a substantial majority of the stand-alone selling prices fall within a reasonably narrow pricing range. </font><font style="font-family:inherit;font-size:6pt;"> </font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:4px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:54px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:10pt;padding-left:36px;"><font style="font-family:inherit;font-size:10pt;">• </font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">TPE</font><font style="font-family:inherit;font-size:10pt;">—When VSOE cannot be established for deliverables in multiple-element arrangements, we apply judgment with respect to whether we can establish a selling price based on TPE. TPE is determined based on competitor prices for interchangeable products or services when sold separately to similarly situated customers. However, as our products contain a significant element of proprietary technology and offer substantially different features and functionality, the comparable pricing of products with similar functionality typically cannot be obtained. Additionally, as we are unable to reliably determine what competitors products’ selling prices are on a stand-alone basis, we are not able to obtain reliable evidence of TPE of selling price. </font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:4px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:54px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:10pt;padding-left:36px;"><font style="font-family:inherit;font-size:10pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">BESP</font><font style="font-family:inherit;font-size:10pt;">—When we are unable to establish selling price using VSOE or TPE, we use BESP in our allocation of arrangement consideration. The objective of BESP is to determine the price at which we would transact a sale if the product or service was sold regularly on a stand-alone basis. BESP is based on considering multiple factors including, but not limited to the sales channel (reseller, distributor or end customer), the geographies in which our products and services were sold (domestic or international) and size of the end customer. </font></div></td></tr></table><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 limit the amount of revenue recognition for delivered elements to the amount that is not contingent on the future delivery of products or services, future performance obligations, or subject to customer-specific return, acceptance or refund privileges. </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 account for multiple agreements with a single partner as </font><font style="font-family:inherit;font-size:10pt;">one</font><font style="font-family:inherit;font-size:10pt;"> arrangement if the contractual terms and/or substance of those agreements indicate that they may be so closely related that they are, in effect, parts of a single arrangement. </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 may occasionally accept returns to address customer satisfaction issues even though there is no contractual provision for such returns. We estimate returns for sales to customers based on historical returns rates applied against current-period gross revenues. Specific customer returns and allowances are considered when determining our sales return reserve estimate.</font></div></div>
CY2017	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; accounting for income taxes, including the valuation allowance on deferred tax assets and reserves for uncertain tax positions; valuation of inventory and contract manufacturer/supplier liabilities; recognition and measurement of contingent liabilities; 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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2017 Q4 Form 10-K Financial Statement

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2017 Q4 Form 10-K Financial Statement

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Files In Submission

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