$AKAM
AKAMAI TECHNOLOGIES INC Stock $akam

$akam Overview Financials Valuation SEC Filings Company Website

2017 Q4 Form 10-K Financial Statement

#000108622218000052 Filed on March 01, 2018

Income Statement

Concept	2017 Q4	2017 Q3	2017 Q2
Revenue	$663.5M	$621.4M	$608.9M
YoY Change	7.68%	6.39%	6.43%
Cost Of Revenue	$229.9M	$225.5M	$214.7M
YoY Change	13.01%	10.28%	4.05%
Gross Profit	$433.5M	$395.9M	$394.2M
YoY Change	5.06%	4.3%	7.77%
Gross Profit Margin	65.34%	63.71%	64.74%
Selling, General & Admin	$238.9M	$242.4M	$241.5M
YoY Change	9.89%	12.24%	14.57%
% of Gross Profit	55.11%	61.22%	61.25%
Research & Development	$59.70M	$57.23M	$53.37M
YoY Change	27.56%	35.16%	41.61%
% of Gross Profit	13.77%	14.45%	13.54%
Depreciation & Amortization	$99.40M	$97.20M	$89.20M
YoY Change	18.33%	15.03%	4.82%
% of Gross Profit	22.93%	24.55%	22.63%
Operating Expenses	$326.3M	$299.6M	$294.8M
YoY Change	13.1%	16.0%	18.67%
Operating Profit	$107.2M	$91.25M	$85.59M
YoY Change	-13.64%	-18.35%	-22.32%
Interest Expense	-$400.0K	$4.746M	$4.646M
YoY Change	-20.0%	1.71%	0.15%
% of Operating Profit	-0.37%	5.2%	5.43%
Other Income/Expense, Net	$500.0K	$535.0K	$563.0K
YoY Change	-82.14%	-31.23%	35.66%
Pretax Income	$32.20M	$91.51M	$85.79M
YoY Change	-74.4%	-18.07%	-21.54%
Income Tax	-$21.30M	$27.59M	$29.04M
% Of Pretax Income	-66.15%	30.16%	33.85%
Net Earnings	$27.52M	$63.91M	$56.75M
YoY Change	-69.97%	-15.91%	-22.93%
Net Earnings / Revenue	4.15%	10.29%	9.32%
Basic Earnings Per Share	$0.16	$0.37	$0.33
Diluted Earnings Per Share	$0.16	$0.37	$0.33
COMMON SHARES
Basic Shares Outstanding	169.2M shares	171.0M shares	172.7M shares
Diluted Shares Outstanding		171.5M shares	173.4M shares

Balance Sheet

Concept	2017 Q4	2017 Q3	2017 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$711.9M	$752.0M	$683.1M
YoY Change	-14.95%	-17.47%	-21.37%
Cash & Equivalents	$313.4M	$368.2M	$352.5M
Short-Term Investments	$398.6M	$383.8M	$330.6M
Other Short-Term Assets	$29.30M	$142.9M	$159.4M
YoY Change	48.49%	21.41%	20.3%
Inventory
Prepaid Expenses
Receivables	$461.5M	$400.8M	$395.9M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$1.346B	$1.296B	$1.238B
YoY Change	2.77%	-6.57%	-9.32%
LONG-TERM ASSETS
Property, Plant & Equipment	$862.5M	$883.8M	$856.0M
YoY Change	7.68%	10.76%	8.8%
Goodwill	$1.499B	$1.359B	$1.357B
YoY Change	21.99%	18.03%	17.95%
Intangibles	$201.3M	$176.3M	$184.0M
YoY Change	34.65%	26.94%	29.0%
Long-Term Investments	$567.6M	$661.9M	$731.8M
YoY Change	-27.17%	-13.78%	0.08%
Other Assets	$136.4M	$113.7M	$114.8M
YoY Change	42.12%	26.58%	26.36%
Total Long-Term Assets	$3.303B	$3.213B	$3.251B
YoY Change	7.82%	8.32%	11.93%
TOTAL ASSETS
Total Short-Term Assets	$1.346B	$1.296B	$1.238B
Total Long-Term Assets	$3.303B	$3.213B	$3.251B
Total Assets	$4.649B	$4.509B	$4.489B
YoY Change	6.31%	3.57%	5.14%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$80.28M	$88.34M	$91.74M
YoY Change	5.46%	18.85%	34.42%
Accrued Expenses	$283.7M	$268.0M	$222.0M
YoY Change	18.83%	-7.95%	-5.12%
Deferred Revenue	$70.50M
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$0.00
YoY Change
Total Short-Term Liabilities	$456.7M	$430.3M	$399.1M
YoY Change	21.92%	-0.29%	5.98%
LONG-TERM LIABILITIES
Long-Term Debt	$662.9M	$657.1M	$651.4M
YoY Change	3.56%	3.56%	3.56%
Other Long-Term Liabilities	$143.0M	$128.8M	$125.8M
YoY Change	20.44%	22.04%	26.1%
Total Long-Term Liabilities	$143.0M	$128.8M	$125.8M
YoY Change	20.44%	22.04%	26.1%
TOTAL LIABILITIES
Total Short-Term Liabilities	$456.7M	$430.3M	$399.1M
Total Long-Term Liabilities	$143.0M	$128.8M	$125.8M
Total Liabilities	$1.286B	$1.236B	$1.202B
YoY Change	11.98%	4.37%	7.38%
SHAREHOLDERS EQUITY
Retained Earnings	-$690.7M	-$761.5M	-$822.0M
YoY Change	-28.11%	-27.64%	-27.15%
Common Stock	$1.699M	$1.755M	$1.751M
YoY Change	-1.96%	-2.17%	-2.23%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$0.00	$306.6M	$177.6M
YoY Change		3.99%	-11.06%
Treasury Stock Shares	0.000 shares	5.823M shares	3.122M shares
Shareholders Equity	$3.362B	$3.273B	$3.287B
YoY Change
Total Liabilities & Shareholders Equity	$4.649B	$4.509B	$4.489B
YoY Change	6.31%	3.57%	5.14%

Cashflow Statement

Concept	2017 Q4	2017 Q3	2017 Q2
OPERATING ACTIVITIES
Net Income	$27.52M	$63.91M	$56.75M
YoY Change	-69.97%	-15.91%	-22.93%
Depreciation, Depletion And Amortization	$99.40M	$97.20M	$89.20M
YoY Change	18.33%	15.03%	4.82%
Cash From Operating Activities	$197.5M	$236.2M	$224.7M
YoY Change	7.22%	-6.23%	-8.02%
INVESTING ACTIVITIES
Capital Expenditures	-$106.9M	-$119.7M	-$97.00M
YoY Change	40.84%	49.81%	24.04%
Acquisitions
YoY Change
Other Investing Activities	-$95.30M	$17.30M	-$197.9M
YoY Change	7.44%	-156.54%	226.03%
Cash From Investing Activities	-$202.2M	-$102.4M	-$294.9M
YoY Change	22.77%	-7.33%	112.46%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-50.90M	-119.7M	-105.5M
YoY Change	-25.91%	39.02%	19.75%
NET CHANGE
Cash From Operating Activities	197.5M	236.2M	224.7M
Cash From Investing Activities	-202.2M	-102.4M	-294.9M
Cash From Financing Activities	-50.90M	-119.7M	-105.5M
Net Change In Cash	-55.60M	14.10M	-175.7M
YoY Change	13.01%	-74.5%	-1109.77%
FREE CASH FLOW
Cash From Operating Activities	$197.5M	$236.2M	$224.7M
Capital Expenditures	-$106.9M	-$119.7M	-$97.00M
Free Cash Flow	$304.4M	$355.9M	$321.7M
YoY Change	17.03%	7.26%	-0.25%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2016Q4	akam	Availableforsale Securities Current Excluding Restricted Trading Securities AvailableforsaleSecuritiesCurrentExcludingRestrictedTradingSecurities	512572000	USD
CY2017Q4	akam	Availableforsale Securities Current Excluding Restricted Trading Securities AvailableforsaleSecuritiesCurrentExcludingRestrictedTradingSecurities	398554000	USD
CY2016Q4	akam	Bandwidth And Co Location BandwidthAndCoLocation	61084000	USD
CY2017Q4	akam	Bandwidth And Co Location BandwidthAndCoLocation	72782000	USD
CY2015	akam	Capitalized Stockbased Compensation Relatedto Software CapitalizedStockbasedCompensationRelatedtoSoftware	17900000	USD
CY2016	akam	Capitalized Stockbased Compensation Relatedto Software CapitalizedStockbasedCompensationRelatedtoSoftware	23100000	USD
CY2017	akam	Capitalized Stockbased Compensation Relatedto Software CapitalizedStockbasedCompensationRelatedtoSoftware	28900000	USD
CY2015	akam	Chargesto Incomefrom Operations ChargestoIncomefromOperations	37870000	USD
CY2016	akam	Chargesto Incomefrom Operations ChargestoIncomefromOperations	49677000	USD
CY2017	akam	Chargesto Incomefrom Operations ChargestoIncomefromOperations	5809000	USD
CY2015	akam	Collectionsfrom Cash Basis Customers CollectionsfromCashBasisCustomers	39529000	USD
CY2016	akam	Collectionsfrom Cash Basis Customers CollectionsfromCashBasisCustomers	50896000	USD
CY2017	akam	Collectionsfrom Cash Basis Customers CollectionsfromCashBasisCustomers	10675000	USD
CY2014Q1	akam	Debt Instrument Convertible Threshold Consecutive Trading Days Not Exceeding DebtInstrumentConvertibleThresholdConsecutiveTradingDaysNotExceeding	P5D
CY2014Q1	akam	Debt Instrument Convertible Threshold Consecutive Trading Term DebtInstrumentConvertibleThresholdConsecutiveTradingTerm	P30D
CY2014Q1	akam	Debt Instrument Convertible Threshold Less Than Percentageof Stock Price Trigger DebtInstrumentConvertibleThresholdLessThanPercentageofStockPriceTrigger	0.98
CY2014Q1	akam	Debt Instrument Convertible Threshold Trading Days Not Exceeding DebtInstrumentConvertibleThresholdTradingDaysNotExceeding	P5D
CY2014Q1	akam	Debt Instrument Convertible Threshold Trading Term DebtInstrumentConvertibleThresholdTradingTerm	P20D
CY2015	akam	Deferred Benefit On Intercompany Sales DeferredBenefitOnIntercompanySales	15500000	USD
CY2016	akam	Deferred Benefit On Intercompany Sales DeferredBenefitOnIntercompanySales	9100000	USD
CY2017	akam	Deferred Benefit On Intercompany Sales DeferredBenefitOnIntercompanySales	16000000	USD
CY2016Q4	akam	Deferred Tax Assets Deferred Rent DeferredTaxAssetsDeferredRent	12592000	USD
CY2017Q4	akam	Deferred Tax Assets Deferred Rent DeferredTaxAssetsDeferredRent	8000000	USD
CY2016Q4	akam	Deferred Tax Assetstax Net Operating Loss And Carryforwards DeferredTaxAssetstaxNetOperatingLossAndCarryforwards	7855000	USD
CY2017Q4	akam	Deferred Tax Assetstax Net Operating Loss And Carryforwards DeferredTaxAssetstaxNetOperatingLossAndCarryforwards	26698000	USD
CY2016Q4	akam	Deferred Tax Liabilities Depreciationand Amortization DeferredTaxLiabilitiesDepreciationandAmortization	10470000	USD
CY2017Q4	akam	Deferred Tax Liabilities Depreciationand Amortization DeferredTaxLiabilitiesDepreciationandAmortization	13933000	USD
CY2015	akam	Effective Income Tax Rate Reconciliation Releaseof Acquisition Related Uncertain Tax Position EffectiveIncomeTaxRateReconciliationReleaseofAcquisitionRelatedUncertainTaxPosition	0.000
CY2016	akam	Effective Income Tax Rate Reconciliation Releaseof Acquisition Related Uncertain Tax Position EffectiveIncomeTaxRateReconciliationReleaseofAcquisitionRelatedUncertainTaxPosition	0.000
CY2017	akam	Effective Income Tax Rate Reconciliation Releaseof Acquisition Related Uncertain Tax Position EffectiveIncomeTaxRateReconciliationReleaseofAcquisitionRelatedUncertainTaxPosition	0.029
CY2015	akam	Effective Income Tax Rate Reconciliation Tax Cutsand Jobs Actof2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsandJobsActof2017Percent	0.000
CY2016	akam	Effective Income Tax Rate Reconciliation Tax Cutsand Jobs Actof2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsandJobsActof2017Percent	0.000
CY2017	akam	Effective Income Tax Rate Reconciliation Tax Cutsand Jobs Actof2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsandJobsActof2017Percent	0.082
CY2015	akam	Employee Taxes Paid Related To Net Share Settlement Of Equity Awards EmployeeTaxesPaidRelatedToNetShareSettlementOfEquityAwards	54164000	USD
CY2016	akam	Employee Taxes Paid Related To Net Share Settlement Of Equity Awards EmployeeTaxesPaidRelatedToNetShareSettlementOfEquityAwards	45545000	USD
CY2017	akam	Employee Taxes Paid Related To Net Share Settlement Of Equity Awards EmployeeTaxesPaidRelatedToNetShareSettlementOfEquityAwards	58395000	USD
CY2017	akam	Letter Of Credit Real Estate Leases LetterOfCreditRealEstateLeases	6400000	USD
CY2017	akam	Minimum Percentage Of Tax Benefit To Be Recognized MinimumPercentageOfTaxBenefitToBeRecognized	0.50
CY2014Q1	akam	Note Hedge Shares Outstanding NoteHedgeSharesOutstanding	7700000	shares
CY2017Q4	akam	Number Of Countries Servers Are In NumberOfCountriesServersAreIn	130	country
CY2017Q4	akam	Number Of Servers NumberOfServers	200000	server
CY2016Q4	akam	Other Long Term Liabilities OtherLongTermLiabilities	15792000	USD
CY2017Q4	akam	Other Long Term Liabilities OtherLongTermLiabilities	24631000	USD
CY2016Q4	akam	Prepaid Salesand Other Taxes Current PrepaidSalesandOtherTaxesCurrent	18877000	USD
CY2014Q1	akam	Paymentsfor Purchaseof Convertible Note Hedgeand Warrant Transactions PaymentsforPurchaseofConvertibleNoteHedgeandWarrantTransactions	23300000	USD
CY2014Q1	akam	Potential Conversion Shares Of Convertible Debt PotentialConversionSharesOfConvertibleDebt	7700000	shares
CY2017Q4	akam	Prepaid Salesand Other Taxes Current PrepaidSalesandOtherTaxesCurrent	22973000	USD
CY2017Q4	akam	Property And Equipment Per Unit Value Minimum PropertyAndEquipmentPerUnitValueMinimum	1000	USD
CY2017	akam	Property And Equipment Useful Life Minimum PropertyAndEquipmentUsefulLifeMinimum	P1Y
CY2016Q4	akam	Property Plant And Equipment And Capitalized Software Net PropertyPlantAndEquipmentAndCapitalizedSoftwareNet	801017000	USD
CY2017Q4	akam	Property Plant And Equipment And Capitalized Software Net PropertyPlantAndEquipmentAndCapitalizedSoftwareNet	862535000	USD
CY2016Q4	akam	Reserve For Cash Basis Customers ReserveForCashBasisCustomers	5316000	USD
CY2017Q4	akam	Reserve For Cash Basis Customers ReserveForCashBasisCustomers	236000	USD
CY2017	akam	Restricted Stock Units Vesting Conditions Service And Performance Based Granted Total RestrictedStockUnitsVestingConditionsServiceAndPerformanceBasedGrantedTotal	3609000	shares
CY2017Q4	akam	Share Based Compensation Arrangement By Share Based Payment Award Options In Money Vested And Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsInMoneyVestedAndExercisableNumber	300000	shares
CY2015	akam	Stock Issued During Period Value Exercise Of Stock Optionsand Vestingof Restrictedand Deferred Stock Units StockIssuedDuringPeriodValueExerciseOfStockOptionsandVestingofRestrictedandDeferredStockUnits	-27670000	USD
CY2016	akam	Stock Issued During Period Value Exercise Of Stock Optionsand Vestingof Restrictedand Deferred Stock Units StockIssuedDuringPeriodValueExerciseOfStockOptionsandVestingofRestrictedandDeferredStockUnits	-27394000	USD
CY2017	akam	Stock Issued During Period Value Exercise Of Stock Optionsand Vestingof Restrictedand Deferred Stock Units StockIssuedDuringPeriodValueExerciseOfStockOptionsandVestingofRestrictedandDeferredStockUnits	-40538000	USD
CY2017	akam	Tax Cutsand Jobs Actof2017 Incomplete Accounting Changein Tax Rate Provisional Income Tax Expense Benefit TaxCutsandJobsActof2017IncompleteAccountingChangeinTaxRateProvisionalIncomeTaxExpenseBenefit	-17400000	USD
CY2017	akam	Tax Cutsand Jobs Actof2017 Incomplete Accounting Provisional Income Tax Expense Benefit TaxCutsandJobsActof2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefit	26000000	USD
CY2017Q4	akam	Tax Cutsand Jobs Actof2017 Incomplete Accounting Provisional Undistributed Accumulated Earningsof Foreign Subsidiary TaxCutsandJobsActof2017IncompleteAccountingProvisionalUndistributedAccumulatedEarningsofForeignSubsidiary	603200000	USD
CY2017	akam	Tax Cutsand Jobs Actof2017 Incomplete Accounting Transition Taxfor Accumulated Foreign Earnings Provisional Income Tax Expense Benefit TaxCutsandJobsActof2017IncompleteAccountingTransitionTaxforAccumulatedForeignEarningsProvisionalIncomeTaxExpenseBenefit	43400000	USD
CY2016Q4	akam	Total Accounts Receivable Reserves TotalAccountsReceivableReserves	6145000	USD
CY2017Q4	akam	Total Accounts Receivable Reserves TotalAccountsReceivableReserves	1279000	USD
CY2016	akam	Total Stock Based Compensation Net Of Taxes TotalStockBasedCompensationNetOfTaxes	95492000	USD
CY2017	akam	Total Stock Based Compensation Net Of Taxes TotalStockBasedCompensationNetOfTaxes	108071000	USD
CY2015Q4	akam	Unrecognized Tax Benefits Including Accrued Interest And Penalties UnrecognizedTaxBenefitsIncludingAccruedInterestAndPenalties	72300000	USD
CY2015	akam	Total Stock Based Compensation Net Of Taxes TotalStockBasedCompensationNetOfTaxes	77644000	USD
CY2016Q4	akam	Unrecognized Tax Benefits Including Accrued Interest And Penalties UnrecognizedTaxBenefitsIncludingAccruedInterestAndPenalties	77100000	USD
CY2017Q4	akam	Unrecognized Tax Benefits Including Accrued Interest And Penalties UnrecognizedTaxBenefitsIncludingAccruedInterestAndPenalties	90700000	USD
CY2014Q1	akam	Value Per Conversionof Convertible Debt ValuePerConversionofConvertibleDebt	1000	USD
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	0001086222
CY2018Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	170031585	shares
CY2017	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2017	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2017Q2	dei	Entity Public Float EntityPublicFloat	8322400000	USD
CY2017	dei	Entity Registrant Name EntityRegistrantName	AKAMAI TECHNOLOGIES INC
CY2017	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2017	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
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CY2017Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	80278000	USD
CY2016Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	374741000	USD
CY2017Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	460406000	USD
CY2016Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	368596000	USD
CY2017Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	459127000	USD
CY2016Q4	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	73231000	USD
CY2017Q4	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	86814000	USD
CY2016Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	238777000	USD
CY2017Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	283743000	USD
CY2016Q4	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	4277000	USD
CY2017Q4	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	4225000	USD
CY2016Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1283690000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1484447000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-56222000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-21930000	USD
CY2016Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	4239588000	USD
CY2017Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	4073362000	USD
CY2015	us-gaap	Adjustment To Additional Paid In Capital Income Tax Effect From Share Based Compensation Net AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet	28870000	USD
CY2016	us-gaap	Adjustment To Additional Paid In Capital Income Tax Effect From Share Based Compensation Net AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet	-3584000	USD
CY2015	us-gaap	Adjustments Noncash Items To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	5804000	USD
CY2016	us-gaap	Adjustments Noncash Items To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	5987000	USD
CY2017	us-gaap	Adjustments Noncash Items To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	10068000	USD
CY2015	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	144544000	USD
CY2016	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	166987000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	193170000	USD
CY2015	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	126677000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	164308000	USD
CY2014Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	9023000	USD
CY2016	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	144506000	USD
CY2015Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	7364000	USD
CY2016Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	6145000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1279000	USD
CY2016Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	829000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1043000	USD
CY2015	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	18525000	USD
CY2016	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	18638000	USD
CY2017	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	18839000	USD
CY2015	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	27067000	USD
CY2016	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	26642000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	30904000	USD
CY2015	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	17097000	shares
CY2016	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	18418000	shares
CY2017	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	19729000	shares
CY2016Q4	us-gaap	Assets Assets	4373146000	USD
CY2017Q4	us-gaap	Assets Assets	4602844000	USD
CY2016Q4	us-gaap	Assets Current AssetsCurrent	1309917000	USD
CY2017Q4	us-gaap	Assets Current AssetsCurrent	1308872000	USD
CY2016Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	1288138000	USD
CY2017Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	958267000	USD
CY2016Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	158000	USD
CY2017Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	2000	USD
CY2016Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	5108000	USD
CY2017Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	5602000	USD
CY2016Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	1293088000	USD
CY2017Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	963867000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	3900000	USD
CY2016Q4	us-gaap	Available For Sale Securities Current AvailableForSaleSecuritiesCurrent	512849000	USD
CY2017Q4	us-gaap	Available For Sale Securities Current AvailableForSaleSecuritiesCurrent	398554000	USD
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	775566000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	559713000	USD
CY2016Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	512572000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	398554000	USD
CY2016Q4	us-gaap	Available For Sale Securities Noncurrent AvailableForSaleSecuritiesNoncurrent	775566000	USD
CY2017Q4	us-gaap	Available For Sale Securities Noncurrent AvailableForSaleSecuritiesNoncurrent	559713000	USD
CY2015	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	1800000	USD
CY2016	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	1700000	USD
CY2017	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	5500000	USD
CY2015	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	19327000	USD
CY2016	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	36742000	USD
CY2017	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	27209000	USD
CY2017	us-gaap	Capitalized Computer Software Impairments1 CapitalizedComputerSoftwareImpairments1	36200000	USD
CY2017Q4	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	32000000	USD
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	238650000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	289473000	USD
CY2017Q2	us-gaap	Revenues Revenues	608908000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	324169000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	313382000	USD
CY2015	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	50823000	USD
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	34696000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-10787000	USD
CY2014Q1	us-gaap	Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1 ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1	104.49
CY2014Q1	us-gaap	Class Of Warrant Or Right Outstanding ClassOfWarrantOrRightOutstanding	7700000	shares
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	0.01
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2016Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	700000000	shares
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	700000000	shares
CY2016Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	173254797	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	169893324	shares
CY2016Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	173254797	shares
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	169893324	shares
CY2016Q4	us-gaap	Common Stock Value CommonStockValue	1733000	USD
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	1699000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	297564000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	301363000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	252613000	USD
CY2016Q4	us-gaap	Convertible Long Term Notes Payable ConvertibleLongTermNotesPayable	640087000	USD
CY2017Q4	us-gaap	Convertible Long Term Notes Payable ConvertibleLongTermNotesPayable	662913000	USD
CY2016Q4	us-gaap	Convertible Preferred Stock Shares Reserved For Future Issuance ConvertiblePreferredStockSharesReservedForFutureIssuance	700000	shares
CY2017Q4	us-gaap	Convertible Preferred Stock Shares Reserved For Future Issuance ConvertiblePreferredStockSharesReservedForFutureIssuance	700000	shares
CY2015	us-gaap	Cost Of Revenue CostOfRevenue	725620000	USD
CY2016Q1	us-gaap	Cost Of Revenue CostOfRevenue	194736000	USD
CY2016Q2	us-gaap	Cost Of Revenue CostOfRevenue	206323000	USD
CY2016Q3	us-gaap	Cost Of Revenue CostOfRevenue	204467000	USD
CY2016Q4	us-gaap	Cost Of Revenue CostOfRevenue	203475000	USD
CY2016	us-gaap	Cost Of Revenue CostOfRevenue	809001000	USD
CY2017Q1	us-gaap	Cost Of Revenue CostOfRevenue	205703000	USD
CY2017Q2	us-gaap	Cost Of Revenue CostOfRevenue	214650000	USD
CY2017Q3	us-gaap	Cost Of Revenue CostOfRevenue	225468000	USD
CY2017Q4	us-gaap	Cost Of Revenue CostOfRevenue	229937000	USD
CY2017	us-gaap	Cost Of Revenue CostOfRevenue	875758000	USD
CY2015	us-gaap	Costs And Expenses CostsAndExpenses	1731298000	USD
CY2016	us-gaap	Costs And Expenses CostsAndExpenses	1880455000	USD
CY2017	us-gaap	Costs And Expenses CostsAndExpenses	2186777000	USD
CY2015	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	70298000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	89816000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	41090000	USD
CY2015	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	62572000	USD
CY2016	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	39952000	USD
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	51244000	USD
CY2015	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-1750000	USD
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	6238000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	6336000	USD
CY2014Q1	us-gaap	Debt Instrument Convertible Conversion Price1 DebtInstrumentConvertibleConversionPrice1	89.56
CY2014Q1	us-gaap	Debt Instrument Convertible Conversion Ratio1 DebtInstrumentConvertibleConversionRatio1	11.1651
CY2014Q1	us-gaap	Debt Instrument Convertible Threshold Percentage Of Stock Price Trigger DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger	1.3
CY2016Q4	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	690000000	USD
CY2017Q4	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	690000000	USD
CY2014Q1	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	690000000	USD
CY2014Q1	us-gaap	Debt Instrument Interest Rate Effective Percentage DebtInstrumentInterestRateEffectivePercentage	0.032
CY2016Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	49913000	USD
CY2017Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	27087000	USD
CY2015	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	23381000	USD
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	4265000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-17136000	USD
CY2015	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-18536000	USD
CY2016	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	3916000	USD
CY2017	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-4992000	USD
CY2015	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	4098000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	7308000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-869000	USD
CY2016Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	132633000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	117401000	USD
CY2016Q4	us-gaap	Deferred Rent Credit Noncurrent DeferredRentCreditNoncurrent	29668000	USD
CY2017Q4	us-gaap	Deferred Rent Credit Noncurrent DeferredRentCreditNoncurrent	31510000	USD
CY2016Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	52972000	USD
CY2017Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	77705000	USD
CY2016Q4	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	3758000	USD
CY2017Q4	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	6839000	USD
CY2015	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-742000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-86000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	21689000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	10055000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	8861000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	130393000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	152960000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	35559000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	8982000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	51069000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	7048000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	11909000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Other Tax Carryforwards DeferredTaxAssetsOtherTaxCarryforwards	23629000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Other Tax Carryforwards DeferredTaxAssetsOtherTaxCarryforwards	49135000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Research DeferredTaxAssetsTaxCreditCarryforwardsResearch	41500000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Research DeferredTaxAssetsTaxCreditCarryforwardsResearch	65900000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards General Business DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness	16932000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards General Business DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness	6611000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	32030000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	20557000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	18390000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	19950000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	1862000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	1239000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	430000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	2670000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Software DeferredTaxLiabilitiesDeferredExpenseCapitalizedSoftware	77375000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Software DeferredTaxLiabilitiesDeferredExpenseCapitalizedSoftware	54687000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	44788000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	48781000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	11652000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	15510000	USD
CY2015	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	13100000	USD
CY2016	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	13700000	USD
CY2017	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	15600000	USD
CY2015	us-gaap	Depreciation Depreciation	272500000	USD
CY2016	us-gaap	Depreciation Depreciation	307700000	USD
CY2017	us-gaap	Depreciation Depreciation	341400000	USD
CY2015	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	299563000	USD
CY2016	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	334302000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	372313000	USD
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.80
CY2016Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.42
CY2016Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.42
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.44
CY2016Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.53
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.81
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.47
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.33
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.35
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.11
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.27
CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.78
CY2016Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.42
CY2016Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.42
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.43
CY2016Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.52
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.79
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.46
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.33
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.35
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.11
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.26
CY2017Q3	us-gaap	Revenues Revenues	621399000	USD
CY2015	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-10036000	USD
CY2016	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-7907000	USD
CY2017	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	12912000	USD
CY2015	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.296
CY2016	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.312
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.309
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 Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	0.012
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	0.017
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	0.007
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.046
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.034
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.078
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.019
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.027
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.037
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.009
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.001
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.007
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies State And Local EffectiveIncomeTaxRateReconciliationTaxContingenciesStateAndLocal	0.017
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies State And Local EffectiveIncomeTaxRateReconciliationTaxContingenciesStateAndLocal	0.020
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies State And Local EffectiveIncomeTaxRateReconciliationTaxContingenciesStateAndLocal	0.016
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.041
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.033
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.069
CY2016Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	110822000	USD
CY2017Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	150784000	USD
CY2015	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	17867000	USD
CY2016	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	23093000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	28851000	USD
CY2017Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	267800000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y10M24D
CY2015	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	49033000	USD
CY2016	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	49014000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	56237000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	171658000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	201542000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	33300000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	22400000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	27900000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	33800000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	36500000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	321121000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	402801000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	149463000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	201259000	USD
CY2015	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	388265000	USD
CY2016	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	439916000	USD
CY2017	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	509165000	USD
CY2015Q4	us-gaap	Goodwill Goodwill	1150244000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	1228503000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	1498688000	USD
CY2016	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-5089000	USD
CY2017	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	10546000	USD
CY2016	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	0	USD
CY2017	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	4217000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	233247000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	273176000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	94518000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	223377000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	186270000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	221604000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	456624000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	459446000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	316122000	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	135218000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	143314000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	97801000	USD
CY2015	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-5000	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-787000	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-430000	USD
CY2015	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	75033000	USD
CY2016	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	120223000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	91640000	USD
CY2015	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	51624000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	18491000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	33232000	USD
CY2015	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	56247000	USD
CY2016	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-3356000	USD
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	63825000	USD
CY2015	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	3224000	USD
CY2016	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-1213000	USD
CY2017	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	1142000	USD
CY2015	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-345000	USD
CY2016	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	5484000	USD
CY2017	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	16378000	USD
CY2015	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-11986000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	9647000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-21422000	USD
CY2015	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-7137000	USD
CY2016	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-23881000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	22311000	USD
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	260000	shares
CY2016Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	149463000	USD
CY2017Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	201259000	USD
CY2016	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	3402000	USD
CY2017	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	3987000	USD
CY2016	us-gaap	Interest Costs Incurred InterestCostsIncurred	22040000	USD
CY2017	us-gaap	Interest Costs Incurred InterestCostsIncurred	22826000	USD
CY2015	us-gaap	Interest Expense InterestExpense	18525000	USD
CY2015	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	0	shares
CY2016	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	0	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	0	shares
CY2015	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	0	shares
CY2016	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	0	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	0	shares
CY2015	us-gaap	Incremental Common Shares Attributable To Participating Nonvested Shares With Non Forfeitable Dividend Rights IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights	1230000	shares
CY2016	us-gaap	Incremental Common Shares Attributable To Participating Nonvested Shares With Non Forfeitable Dividend Rights IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights	914000	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Participating Nonvested Shares With Non Forfeitable Dividend Rights IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights	892000	shares
CY2015	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	794000	shares
CY2016	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	384000	shares
CY2016	us-gaap	Interest Expense InterestExpense	18638000	USD
CY2017	us-gaap	Interest Expense InterestExpense	18839000	USD
CY2015	us-gaap	Investment Income Interest InvestmentIncomeInterest	11200000	USD
CY2016	us-gaap	Investment Income Interest InvestmentIncomeInterest	14702000	USD
CY2017	us-gaap	Investment Income Interest InvestmentIncomeInterest	17855000	USD
CY2015	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	47900000	USD
CY2016	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	50300000	USD
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	58800000	USD
CY2016Q4	us-gaap	Liabilities Liabilities	1148776000	USD
CY2017Q4	us-gaap	Liabilities Liabilities	1292121000	USD
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4373146000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	4602844000	USD
CY2016Q4	us-gaap	Liabilities Current LiabilitiesCurrent	374588000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	463904000	USD
CY2017Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	697000000	USD
CY2016Q4	us-gaap	Marketable Securities Noncurrent MarketableSecuritiesNoncurrent	779311000	USD
CY2017Q4	us-gaap	Marketable Securities Noncurrent MarketableSecuritiesNoncurrent	567592000	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-297029000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-359779000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-365005000	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-435564000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-469430000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-459677000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	793452000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	871812000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	800983000	USD
CY2015	us-gaap	Net Income Loss NetIncomeLoss	321406000	USD
CY2016Q1	us-gaap	Net Income Loss NetIncomeLoss	74858000	USD
CY2016Q2	us-gaap	Net Income Loss NetIncomeLoss	73635000	USD
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	76000000	USD
CY2016Q4	us-gaap	Net Income Loss NetIncomeLoss	91639000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	316132000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	80930000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	57772000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	60512000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	19107000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	218321000	USD
CY2017	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	1	segment
CY2015	us-gaap	Operating Income Loss OperatingIncomeLoss	466150000	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	459594000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	316219000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	756998000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	50187000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	56211000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	58680000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	61031000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	49418000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	481471000	USD
CY2015	us-gaap	Operating Leases Income Statement Sublease Revenue OperatingLeasesIncomeStatementSubleaseRevenue	3600000	USD
CY2016	us-gaap	Operating Leases Income Statement Sublease Revenue OperatingLeasesIncomeStatementSubleaseRevenue	1300000	USD
CY2017	us-gaap	Operating Leases Income Statement Sublease Revenue OperatingLeasesIncomeStatementSubleaseRevenue	3600000	USD
CY2016Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	9736000	USD
CY2017Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	8368000	USD
CY2016Q4	us-gaap	Other Assets Current OtherAssetsCurrent	19733000	USD
CY2017Q4	us-gaap	Other Assets Current OtherAssetsCurrent	29302000	USD
CY2016Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	95953000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	112829000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-22872000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-14081000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	34698000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-23842000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-14769000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	34292000	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-970000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-688000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-406000	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-773000	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-432000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-245000	USD
CY2016Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	6719000	USD
CY2017Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	22178000	USD
CY2015	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-2201000	USD
CY2016Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	118691000	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	142955000	USD
CY2016	us-gaap	Payments For Software PaymentsForSoftware	135340000	USD
CY2017	us-gaap	Payments For Software PaymentsForSoftware	160632000	USD
CY2016	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	3788000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	887000	USD
CY2016Q4	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	24727000	USD
CY2017Q4	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	28866000	USD
CY2015	us-gaap	Other Restructuring Costs OtherRestructuringCosts	0	USD
CY2016	us-gaap	Other Restructuring Costs OtherRestructuringCosts	4587000	USD
CY2017	us-gaap	Other Restructuring Costs OtherRestructuringCosts	31965000	USD
CY2014Q1	us-gaap	Payments For Hedge Financing Activities PaymentsForHedgeFinancingActivities	101300000	USD
CY2015	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	2494000	USD
CY2016	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-782000	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	2098000	USD
CY2014Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	62000000	USD
CY2015	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	302606000	USD
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	373794000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	361194000	USD
CY2015	us-gaap	Payments For Restructuring PaymentsForRestructuring	661000	USD
CY2016	us-gaap	Payments For Restructuring PaymentsForRestructuring	4488000	USD
CY2017	us-gaap	Payments For Restructuring PaymentsForRestructuring	9110000	USD
CY2015	us-gaap	Payments For Software PaymentsForSoftware	133307000	USD
CY2015	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	692879000	USD
CY2016	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	781061000	USD
CY2017	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	326497000	USD
CY2015	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	141147000	USD
CY2016	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	95439000	USD
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	369073000	USD
CY2015	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	311676000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	180949000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	254146000	USD
CY2016Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2017Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2016Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2017Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	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	104303000	USD
CY2017Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	137809000	USD
CY2016Q4	us-gaap	Prepaid Taxes PrepaidTaxes	25161000	USD
CY2017Q4	us-gaap	Prepaid Taxes PrepaidTaxes	30314000	USD
CY2015	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	19374000	USD
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	219916000	USD
CY2016	us-gaap	Property Plant And Equipment Disposals PropertyPlantAndEquipmentDisposals	93400000	USD
CY2017	us-gaap	Property Plant And Equipment Disposals PropertyPlantAndEquipmentDisposals	174600000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	2084707000	USD
CY2017	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1096000	USD
CY2015	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	2008000	USD
CY2016	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	57740000	USD
CY2016	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	1664000	USD
CY2017	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	6750000	USD
CY2015	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	61791000	USD
CY2016	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	59560000	USD
CY2017	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	55680000	USD
CY2014Q1	us-gaap	Proceeds From Issuance Of Warrants ProceedsFromIssuanceOfWarrants	78000000	USD
CY2015	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	843931000	USD
CY2016	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	664837000	USD
CY2017	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	432853000	USD
CY2015	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-2050000	USD
CY2016	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	0	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	2346982000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	801017000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	862535000	USD
CY2015	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	148591000	USD
CY2016	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	167628000	USD
CY2017	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	222434000	USD
CY2017Q4	us-gaap	Restructuring And Related Cost Expected Cost1 RestructuringAndRelatedCostExpectedCost1	65000000	USD
CY2016	us-gaap	Restructuring And Related Cost Incurred Cost RestructuringAndRelatedCostIncurredCost	9700000	USD
CY2017	us-gaap	Restructuring And Related Cost Incurred Cost RestructuringAndRelatedCostIncurredCost	49300000	USD
CY2015	us-gaap	Restructuring Charges RestructuringCharges	767000	USD
CY2016	us-gaap	Restructuring Charges RestructuringCharges	10301000	USD
CY2017	us-gaap	Restructuring Charges RestructuringCharges	54884000	USD
CY2014Q4	us-gaap	Restructuring Reserve RestructuringReserve	281000	USD
CY2015Q4	us-gaap	Restructuring Reserve RestructuringReserve	387000	USD
CY2016Q4	us-gaap	Restructuring Reserve RestructuringReserve	1613000	USD
CY2017Q4	us-gaap	Restructuring Reserve RestructuringReserve	14243000	USD
CY2016	us-gaap	Restructuring Reserve Settled Without Cash2 RestructuringReserveSettledWithoutCash2	4587000	USD
CY2017	us-gaap	Restructuring Reserve Settled Without Cash2 RestructuringReserveSettledWithoutCash2	33144000	USD
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-960729000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-742408000	USD
CY2015	us-gaap	Revenues Revenues	2197448000	USD
CY2016Q1	us-gaap	Revenues Revenues	567725000	USD
CY2016Q2	us-gaap	Revenues Revenues	572135000	USD
CY2016Q3	us-gaap	Revenues Revenues	584065000	USD
CY2016Q4	us-gaap	Revenues Revenues	616124000	USD
CY2016	us-gaap	Revenues Revenues	2340049000	USD
CY2017Q1	us-gaap	Revenues Revenues	609237000	USD
CY2017Q4	us-gaap	Revenues Revenues	663452000	USD
CY2017	us-gaap	Revenues Revenues	2502996000	USD
CY2015	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	440988000	USD
CY2016	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	426967000	USD
CY2017	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	493632000	USD
CY2015	us-gaap	Share Based Compensation ShareBasedCompensation	126677000	USD
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	339000	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	36.35
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	338000	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	36.31
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	34.68
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	47.26
CY2017Q4	us-gaap	Share Price SharePrice	65.04
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	13000	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	9734000	USD
CY2017Q4	us-gaap	Share Price SharePrice	65.04
CY2017Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	9708000	USD
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P1Y7M28D
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	339000	shares
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	35.51
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	874000	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	36.36
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue	9731000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	144506000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	164308000	USD
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P1Y7M28D
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1	P1Y7M28D
CY2017Q4	us-gaap	Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Amount Of Unrecorded Benefit SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit	3300000	USD
CY2017	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	522000	shares
CY2015	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	34841000	USD
CY2016	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	39914000	USD
CY2017	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	42302000	USD
CY2013Q4	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	750000000.0	USD
CY2016Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	1000000000.0	USD
CY2017Q4	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	333300000	USD
CY2014Q4	us-gaap	Stockholders Equity StockholdersEquity	2945335000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	3120878000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	3224370000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	3310723000	USD
CY2016Q4	us-gaap	Supplies Supplies	15805000	USD
CY2017Q4	us-gaap	Supplies Supplies	26354000	USD
CY2016Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	52858000	USD
CY2017Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	47584000	USD
CY2015	us-gaap	Treasury Stock Retired Cost Method Amount TreasuryStockRetiredCostMethodAmount	0	USD
CY2016	us-gaap	Treasury Stock Retired Cost Method Amount TreasuryStockRetiredCostMethodAmount	0	USD
CY2017	us-gaap	Treasury Stock Retired Cost Method Amount TreasuryStockRetiredCostMethodAmount	0	USD
CY2015	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	302606000	USD
CY2016	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	373794000	USD
CY2017	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	361194000	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	33320000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	65290000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	69117000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	85845000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	5739000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	6491000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	277000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	315000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	2038000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	10000000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	13700000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	10700000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	2200000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	3900000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	2300000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	27043000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	6252000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	27163000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	11238000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	6391000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	2692000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	257000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	287000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	12850000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	76000000	USD
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	180415000	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	176215000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	172711000	shares
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	178391000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	174917000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	171559000	shares
CY2017	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Concentrations of Credit Risk</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The amounts reflected in the consolidated balance sheets for accounts receivable, other current assets, accounts payable, accrued liabilities and other current liabilities approximate fair values due to their short-term maturities. The Company maintains the majority of its cash, cash equivalents and marketable securities with major financial institutions that the Company believes to be of high credit standing. The Company believes that, as of </font><font style="font-family:inherit;font-size:10pt;">December 31, 2017</font><font style="font-family:inherit;font-size:10pt;">, its concentration of credit risk related to cash equivalents and marketable securities was not significant.</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Concentrations of credit risk with respect to accounts receivable are primarily limited to certain customers to which the Company makes substantial sales. The Company’s customer base consists of a large number of geographically-dispersed customers diversified across several industries. To reduce risk, the Company routinely assesses the financial strength of its customers. Based on such assessments, the Company believes that its accounts receivable credit risk exposure is limited. For the years ended </font><font style="font-family:inherit;font-size:10pt;">December 31, 2017, 2016 and 2015</font><font style="font-family:inherit;font-size:10pt;">, no customer accounted for more than 10% of total revenue. As of </font><font style="font-family:inherit;font-size:10pt;">December 31, 2017</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:inherit;font-size:10pt;">2016</font><font style="font-family:inherit;font-size:10pt;">, no customer had an accounts receivable balance greater than 10% of total accounts receivable. The Company believes that, as of </font><font style="font-family:inherit;font-size:10pt;">December 31, 2017</font><font style="font-family:inherit;font-size:10pt;">, its concentration of credit risk related to accounts receivable was not significant.</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%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Use of Estimates</font></div><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:left;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Company prepares its consolidated financial statements in conformity with accounting principles generally accepted in the United States of America. These principles require management to make estimates, judgments and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses, and the amounts disclosed in the related notes to the consolidated financial statements. Actual results and outcomes may differ materially from management’s estimates, judgments and assumptions. Significant estimates, judgments and assumptions used in these financial statements include, but are not limited to, those related to revenue, accounts receivable and related reserves, valuation and impairment of investments and marketable securities, valuation and useful lives of acquired intangible assets, useful lives and realizability of long-lived assets, capitalized internal-use software development costs, income tax reserves and accounting for stock-based compensation. Estimates are periodically reviewed in light of changes in circumstances, facts and experience. The effects of material revisions in estimates are reflected in the consolidated financial statements prospectively from the date of the change in estimate.</font></div></div>

Files In Submission

Name	View Source	Status
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$AKAM
AKAMAI TECHNOLOGIES INC Stock $akam

2017 Q4 Form 10-K Financial Statement

#000108622218000052 Filed on March 01, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AKAM AKAMAI TECHNOLOGIES INC Stock $akam

2017 Q4 Form 10-K Financial Statement

#000108622218000052 Filed on March 01, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AKAM
AKAMAI TECHNOLOGIES INC Stock $akam