$RMBS
RAMBUS INC Stock $rmbs

$rmbs Overview Financials Valuation SEC Filings Company Website

2017 Q4 Form 10-K Financial Statement

#000091727318000007 Filed on February 23, 2018

Income Statement

Concept	2017 Q4	2017 Q3	2017
Revenue	$101.9M	$99.13M	$393.1M
YoY Change	4.44%	10.33%	16.79%
Cost Of Revenue	$18.00M	$14.46M	$55.36M
YoY Change	-15.89%	16.65%	20.99%
Gross Profit	$83.90M	$84.68M	$337.7M
YoY Change	10.1%	9.32%	16.12%
Gross Profit Margin	82.34%	85.42%	85.92%
Selling, General & Admin	$28.80M	$26.80M	$110.9M
YoY Change	12.94%	8.08%	16.6%
% of Gross Profit	34.33%	31.65%	32.85%
Research & Development	$39.40M	$36.20M	$149.1M
YoY Change	1.81%	7.03%	14.86%
% of Gross Profit	46.96%	42.75%	44.16%
Depreciation & Amortization	$13.90M	$13.80M	$13.30M
YoY Change	-5.44%	2.22%	2.58%
% of Gross Profit	16.57%	16.3%	3.94%
Operating Expenses	$68.30M	$63.00M	$260.1M
YoY Change	6.55%	7.47%	15.59%
Operating Profit	$15.72M	$17.01M	$54.41M
YoY Change	2899.81%	43.96%	61.72%
Interest Expense	-$3.100M	$3.287M	$13.72M
YoY Change	3.33%	2.94%	7.65%
% of Operating Profit	-19.72%	19.32%	25.22%
Other Income/Expense, Net		-$3.079M	-$13.42M
YoY Change		0.92%	21.93%
Pretax Income	$11.60M	$13.93M	$40.99M
YoY Change	-564.0%	58.94%	81.07%
Income Tax	$27.00M	$6.236M	$63.85M
% Of Pretax Income	232.76%	44.76%	155.78%
Net Earnings	-$36.17M	$7.695M	-$22.86M
YoY Change	949.87%	70.58%	-435.22%
Net Earnings / Revenue	-35.5%	7.76%	-5.82%
Basic Earnings Per Share		$0.07	-$0.21
Diluted Earnings Per Share	-$330.0K	$0.07	-$0.21
COMMON SHARES
Basic Shares Outstanding	109.7M shares	109.6M shares	110.2M shares
Diluted Shares Outstanding	109.7M shares	113.1M shares	110.2M shares

Balance Sheet

Concept	2017 Q4	2017 Q3	2017
SHORT-TERM ASSETS
Cash & Short-Term Investments	$329.4M	$183.6M	$329.4M
YoY Change	91.29%	21.75%	91.29%
Cash & Equivalents	$225.8M	$182.3M	$225.8M
Short-Term Investments	$103.5M	$1.300M	$103.5M
Other Short-Term Assets	$11.30M	$11.00M	$11.30M
YoY Change	-36.87%	-50.45%	-36.87%
Inventory	$5.159M	$5.015M	$5.200M
Prepaid Expenses
Receivables	$25.33M	$49.80M	$25.90M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$371.7M	$249.4M	$371.7M
YoY Change	71.48%	25.16%	71.45%
LONG-TERM ASSETS
Property, Plant & Equipment	$54.30M	$54.04M	$54.30M
YoY Change	-7.08%	-8.71%	-7.02%
Goodwill	$209.7M	$209.3M
YoY Change	2.38%	0.86%
Intangibles	$91.72M	$102.5M
YoY Change	-30.72%
Long-Term Investments
YoY Change
Other Assets	$4.543M	$2.283M	$163.6M
YoY Change	65.26%	-39.1%	-4.38%
Total Long-Term Assets	$519.3M	$574.7M	$519.4M
YoY Change	-8.36%	-4.38%	-8.35%
TOTAL ASSETS
Total Short-Term Assets	$371.7M	$249.4M	$371.7M
Total Long-Term Assets	$519.3M	$574.7M	$519.4M
Total Assets	$891.1M	$824.1M	$891.1M
YoY Change	13.73%	2.98%	13.73%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$9.614M	$7.016M	$9.600M
YoY Change	-1.83%	-31.13%	-2.04%
Accrued Expenses	$17.10M	$12.30M	$17.10M
YoY Change	20.42%	20.59%	20.42%
Deferred Revenue	$18.27M
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$78.50M	$131.5M	$78.50M
YoY Change
Total Short-Term Liabilities	$132.8M	$182.7M	$132.8M
YoY Change	158.95%	205.58%	158.87%
LONG-TERM LIABILITIES
Long-Term Debt	$172.7M	$37.50M	$172.7M
YoY Change	5.18%	-76.94%	5.18%
Other Long-Term Liabilities	$763.0K	$14.38M	$13.90M
YoY Change	-78.91%	95.87%	286.11%
Total Long-Term Liabilities	$763.0K	$14.38M	$186.6M
YoY Change	-78.91%	95.87%	11.2%
TOTAL LIABILITIES
Total Short-Term Liabilities	$132.8M	$182.7M	$132.8M
Total Long-Term Liabilities	$763.0K	$14.38M	$186.6M
Total Liabilities	$319.5M	$234.6M	$319.5M
YoY Change	38.48%	-5.2%	38.49%
SHAREHOLDERS EQUITY
Retained Earnings	-$636.2M	-$592.9M
YoY Change	3.44%	-3.06%
Common Stock	$1.213B	$1.188B
YoY Change	2.67%	1.22%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$571.6M	$589.5M	$571.6M
YoY Change
Total Liabilities & Shareholders Equity	$891.1M	$824.1M	$891.1M
YoY Change	13.73%	2.98%	13.73%

Cashflow Statement

Concept	2017 Q4	2017 Q3	2017
OPERATING ACTIVITIES
Net Income	-$36.17M	$7.695M	-$22.86M
YoY Change	949.87%	70.58%	-435.22%
Depreciation, Depletion And Amortization	$13.90M	$13.80M	$13.30M
YoY Change	-5.44%	2.22%	2.58%
Cash From Operating Activities	$59.60M	$15.30M	$117.4M
YoY Change	92.26%	36.61%	22.84%
INVESTING ACTIVITIES
Capital Expenditures	-$3.900M	-$2.100M	$9.385M
YoY Change	2.63%	75.0%	9.69%
Acquisitions			$0.00
YoY Change			-100.0%
Other Investing Activities	-$102.5M	$0.00	-$66.00M
YoY Change	-520.08%	-100.0%	-31.75%
Cash From Investing Activities	-$106.5M	-$2.000M	-$75.47M
YoY Change	-614.49%	-98.24%	-28.26%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$50.04M
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	89.80M	1.500M	$46.45M
YoY Change	-1860.78%	-61.54%	1619.55%
NET CHANGE
Cash From Operating Activities	59.60M	15.30M	$117.4M
Cash From Investing Activities	-106.5M	-2.000M	-$75.47M
Cash From Financing Activities	89.80M	1.500M	$46.45M
Net Change In Cash	42.90M	14.80M	$90.55M
YoY Change	-7.94%	-115.04%	-1411.37%
FREE CASH FLOW
Cash From Operating Activities	$59.60M	$15.30M	$117.4M
Capital Expenditures	-$3.900M	-$2.100M	$9.385M
Free Cash Flow	$63.50M	$17.40M	$108.1M
YoY Change	82.47%	40.32%	24.13%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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	0000917273
CY2018Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	109847582	shares
CY2017	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2017	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2017Q2	dei	Entity Public Float EntityPublicFloat	1000000000	USD
CY2017	dei	Entity Registrant Name EntityRegistrantName	RAMBUS INC
CY2017	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2017	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2017	rmbs	Adjustmentsto Additional Paidin Capital Purchaseofconvertiblenotehedges AdjustmentstoAdditionalPaidinCapitalPurchaseofconvertiblenotehedges	33523000	USD
CY2016Q4	rmbs	Cash Cash Equivalents And Short Term Investments Amortized Cost Disclosure CashCashEquivalentsAndShortTermInvestmentsAmortizedCostDisclosure	172202000	USD
CY2017Q4	rmbs	Cash Cash Equivalents And Short Term Investments Amortized Cost Disclosure CashCashEquivalentsAndShortTermInvestmentsAmortizedCostDisclosure	329508000	USD
CY2016Q4	rmbs	Cash Cash Equivalents And Short Term Investments Fair Value Disclosure CashCashEquivalentsAndShortTermInvestmentsFairValueDisclosure	172182000	USD
CY2017Q4	rmbs	Cash Cash Equivalents And Short Term Investments Fair Value Disclosure CashCashEquivalentsAndShortTermInvestmentsFairValueDisclosure	329376000	USD
CY2016Q4	rmbs	Cash Cash Equivalents And Short Term Investments Unrealized Gains CashCashEquivalentsAndShortTermInvestmentsUnrealizedGains	1000	USD
CY2017Q4	rmbs	Cash Cash Equivalents And Short Term Investments Unrealized Gains CashCashEquivalentsAndShortTermInvestmentsUnrealizedGains	0	USD
CY2016Q4	rmbs	Cash Cash Equivalents And Short Term Investments Unrealized Losses CashCashEquivalentsAndShortTermInvestmentsUnrealizedLosses	21000	USD
CY2017Q4	rmbs	Cash Cash Equivalents And Short Term Investments Unrealized Losses CashCashEquivalentsAndShortTermInvestmentsUnrealizedLosses	132000	USD
CY2016Q4	rmbs	Cash Fair Value Disclosure CashFairValueDisclosure	51031000	USD
CY2017Q4	rmbs	Cash Fair Value Disclosure CashFairValueDisclosure	68168000	USD
CY2016Q4	rmbs	Current And Long Term Imputed Financing Obligation CurrentAndLongTermImputedFinancingObligation	38900000	USD
CY2017Q4	rmbs	Current And Long Term Imputed Financing Obligation CurrentAndLongTermImputedFinancingObligation	38300000	USD
CY2016Q4	rmbs	Deferred Tax Assets Depreciation And Amortization DeferredTaxAssetsDepreciationAndAmortization	22348000	USD
CY2017Q4	rmbs	Deferred Tax Assets Depreciation And Amortization DeferredTaxAssetsDepreciationAndAmortization	10840000	USD
CY2016Q4	rmbs	Deferred Tax Assets Net Before Deducting Valuation Allowance DeferredTaxAssetsNetBeforeDeductingValuationAllowance	180271000	USD
CY2017Q4	rmbs	Deferred Tax Assets Net Before Deducting Valuation Allowance DeferredTaxAssetsNetBeforeDeductingValuationAllowance	200180000	USD
CY2016Q4	rmbs	Deferred Tax Liabilities Convertible Debt DeferredTaxLiabilitiesConvertibleDebt	3870000	USD
CY2017Q4	rmbs	Deferred Tax Liabilities Convertible Debt DeferredTaxLiabilitiesConvertibleDebt	791000	USD
CY2017Q4	rmbs	Derivative Nonmonetary Notional Amount Shares DerivativeNonmonetaryNotionalAmountShares	9100000	shares
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CY2017	rmbs	Effective Income Tax Rate Reconciliation Executive Compensation EffectiveIncomeTaxRateReconciliationExecutiveCompensation	0.018
CY2015	rmbs	Effective Income Tax Rate Reconciliation Withholding Tax EffectiveIncomeTaxRateReconciliationWithholdingTax	0.341
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CY2015	rmbs	Effectof Exchange Rateonassumedcashliabilityfromacquisition EffectofExchangeRateonassumedcashliabilityfromacquisition	0	USD
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CY2017	rmbs	Effectof Exchange Rateonassumedcashliabilityfromacquisition EffectofExchangeRateonassumedcashliabilityfromacquisition	0	USD
CY2015	rmbs	Financing Expense From Lease Facilities FinancingExpenseFromLeaseFacilities	4500000	USD
CY2016	rmbs	Financing Expense From Lease Facilities FinancingExpenseFromLeaseFacilities	4400000	USD
CY2017	rmbs	Financing Expense From Lease Facilities FinancingExpenseFromLeaseFacilities	4400000	USD
CY2016Q4	rmbs	Gross Unrealized Gain On Securities And Cash GrossUnrealizedGainOnSecuritiesAndCash	1000	USD
CY2017Q4	rmbs	Gross Unrealized Gain On Securities And Cash GrossUnrealizedGainOnSecuritiesAndCash	0	USD
CY2016Q4	rmbs	Gross Unrealized Loss On Securities And Cash GrossUnrealizedLossOnSecuritiesAndCash	21000	USD
CY2017Q4	rmbs	Gross Unrealized Loss On Securities And Cash GrossUnrealizedLossOnSecuritiesAndCash	132000	USD
CY2017Q4	rmbs	Intangible Asset Amortization Expense After Year Five IntangibleAssetAmortizationExpenseAfterYearFive	3064000	USD
CY2016Q4	rmbs	Long Term Imputed Financing Obligation LongTermImputedFinancingObligation	38029000	USD
CY2017Q4	rmbs	Long Term Imputed Financing Obligation LongTermImputedFinancingObligation	37262000	USD
CY2016	rmbs	Maximum Maturity Period Available For Sale Securities MaximumMaturityPeriodAvailableForSaleSecurities	P3Y
CY2017	rmbs	Maximum Maturity Period Available For Sale Securities MaximumMaturityPeriodAvailableForSaleSecurities	P3Y
CY2017	rmbs	Maximum Original Maturity Period To Be Classified As Cash And Cash Equivalents MaximumOriginalMaturityPeriodToBeClassifiedAsCashAndCashEquivalents	P3M
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CY2017	rmbs	Maximum Remaining Maturity Period Available For Sale Securities MaximumRemainingMaturityPeriodAvailableForSaleSecurities	P1Y
CY2015	rmbs	Operating Expenses Segment OperatingExpensesSegment	108983000	USD
CY2016	rmbs	Operating Expenses Segment OperatingExpensesSegment	150712000	USD
CY2017	rmbs	Operating Expenses Segment OperatingExpensesSegment	169914000	USD
CY2015	rmbs	Paymentofadditionalpurchaseconsiderationfromacquisition Paymentofadditionalpurchaseconsiderationfromacquisition	0	USD
CY2016	rmbs	Paymentofadditionalpurchaseconsiderationfromacquisition Paymentofadditionalpurchaseconsiderationfromacquisition	10206000	USD
CY2017	rmbs	Paymentofadditionalpurchaseconsiderationfromacquisition Paymentofadditionalpurchaseconsiderationfromacquisition	0	USD
CY2015	rmbs	Payments Under Installment PaymentsUnderInstallment	1717000	USD
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CY2017	rmbs	Payments Under Installment PaymentsUnderInstallment	0	USD
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CY2017Q4	rmbs	Property Plant And Equipment Cost Capitalization Amount PropertyPlantAndEquipmentCostCapitalizationAmount	40320000	USD
CY2017	rmbs	Revenue Recognition Number Of Types Of Royalty Revenue RevenueRecognitionNumberOfTypesOfRoyaltyRevenue	2
CY2015	rmbs	Segment Operating Income Loss SegmentOperatingIncomeLoss	187295000	USD
CY2016	rmbs	Segment Operating Income Loss SegmentOperatingIncomeLoss	185885000	USD
CY2017	rmbs	Segment Operating Income Loss SegmentOperatingIncomeLoss	223182000	USD
CY2017	rmbs	Share Based Compensation Arrangement By Share Based Payment Award Options To Derive Shares Available For Grant Denominator ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsToDeriveSharesAvailableForGrantDenominator	1	denominator
CY2015	rmbs	Segmentreconcilingitems Segmentreconcilingitems	115875000	USD
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CY2017	rmbs	Share Based Compensation Arrangement By Share Based Payment Award Discount From Market Price Specific Date ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceSpecificDate	0.15
CY2017Q4	rmbs	Unrecognized Tax Benefits Accrued Income Taxes Noncurrent UnrecognizedTaxBenefitsAccruedIncomeTaxesNoncurrent	2200000	USD
CY2017	rmbs	Share Based Compensation Arrangement By Share Based Payment Award Options To Derive Shares Available For Grant Numerator ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsToDeriveSharesAvailableForGrantNumerator	1.5	numerator
CY2017	rmbs	Termsof Noncancellable License Agreement Minimum TermsofNoncancellableLicenseAgreementMinimum	P1Y
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CY2015	rmbs	Unsettled Forward Contract Indexedto Issuers Stock Classifiedwithin Stock UnsettledForwardContractIndexedtoIssuersStockClassifiedwithinStock	20000000	USD
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CY2015	rmbs	Upfront Payment Related Fees Under Accelerated Stock Repurchase Program UpfrontPaymentRelatedFeesUnderAcceleratedStockRepurchaseProgram	100113000	USD
CY2016	rmbs	Upfront Payment Related Fees Under Accelerated Stock Repurchase Program UpfrontPaymentRelatedFeesUnderAcceleratedStockRepurchaseProgram	0	USD
CY2017	rmbs	Upfront Payment Related Fees Under Accelerated Stock Repurchase Program UpfrontPaymentRelatedFeesUnderAcceleratedStockRepurchaseProgram	50038000	USD
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CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	27403000	USD
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CY2015	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	6372000	USD
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CY2015	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	25074000	USD
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CY2016Q4	us-gaap	Business Acquisition Cost Of Acquired Entity Transaction Costs BusinessAcquisitionCostOfAcquiredEntityTransactionCosts	3400000	USD
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CY2015	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	188852000	USD
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CY2015	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	374036000	USD
CY2016	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	364443000	USD
CY2015	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	0	USD
CY2016	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	-6845000	USD
CY2017	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	0	USD
CY2016Q4	us-gaap	Cash Cash	51031000	USD
CY2017Q4	us-gaap	Cash Cash	68168000	USD
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	154126000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	143764000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	135294000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	225844000	USD
CY2015	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-10362000	USD
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-8470000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	90550000	USD
CY2017Q4	us-gaap	Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1 ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1	23.30
CY2017Q4	us-gaap	Class Of Warrant Or Right Number Of Securities Called By Warrants Or Rights ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights	9100000	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	0.001
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2016Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2016Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	111053734	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	109763967	shares
CY2016Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	111053734	shares
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	109763967	shares
CY2016Q4	us-gaap	Common Stock Value CommonStockValue	111000	USD
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	110000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	212163000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-7061000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-14451000	USD
CY2015	us-gaap	Contracts Revenue ContractsRevenue	16542000	USD
CY2016	us-gaap	Contracts Revenue ContractsRevenue	45931000	USD
CY2017	us-gaap	Contracts Revenue ContractsRevenue	66993000	USD
CY2017Q4	us-gaap	Contractual Obligation ContractualObligation	323275000	USD
CY2017Q4	us-gaap	Contractual Obligation Due After Fifth Year ContractualObligationDueAfterFifthYear	174557000	USD
CY2017Q4	us-gaap	Contractual Obligation Due In Fifth Year ContractualObligationDueInFifthYear	5753000	USD
CY2017Q4	us-gaap	Contractual Obligation Due In Fourth Year ContractualObligationDueInFourthYear	7211000	USD
CY2017Q4	us-gaap	Contractual Obligation Due In Next Twelve Months ContractualObligationDueInNextTwelveMonths	107624000	USD
CY2017Q4	us-gaap	Contractual Obligation Due In Second Year ContractualObligationDueInSecondYear	18184000	USD
CY2017Q4	us-gaap	Contractual Obligation Due In Third Year ContractualObligationDueInThirdYear	9946000	USD
CY2016Q4	us-gaap	Convertible Long Term Notes Payable ConvertibleLongTermNotesPayable	126167000	USD
CY2017Q4	us-gaap	Convertible Long Term Notes Payable ConvertibleLongTermNotesPayable	135447000	USD
CY2016Q4	us-gaap	Convertible Notes Payable ConvertibleNotesPayable	126167000	USD
CY2017Q4	us-gaap	Convertible Notes Payable ConvertibleNotesPayable	213898000	USD
CY2016Q4	us-gaap	Convertible Notes Payable Current ConvertibleNotesPayableCurrent	0	USD
CY2017Q4	us-gaap	Convertible Notes Payable Current ConvertibleNotesPayableCurrent	78451000	USD
CY2015	us-gaap	Cost Of Goods Sold CostOfGoodsSold	12377000	USD
CY2016	us-gaap	Cost Of Goods Sold CostOfGoodsSold	21329000	USD
CY2017	us-gaap	Cost Of Goods Sold CostOfGoodsSold	23783000	USD
CY2015	us-gaap	Cost Of Revenue CostOfRevenue	32967000	USD
CY2016	us-gaap	Cost Of Revenue CostOfRevenue	45761000	USD
CY2017	us-gaap	Cost Of Revenue CostOfRevenue	55364000	USD
CY2015	us-gaap	Costs And Expenses CostsAndExpenses	224858000	USD
CY2016Q1	us-gaap	Costs And Expenses CostsAndExpenses	63388000	USD
CY2016Q2	us-gaap	Costs And Expenses CostsAndExpenses	64493000	USD
CY2016Q3	us-gaap	Costs And Expenses CostsAndExpenses	78039000	USD
CY2016Q4	us-gaap	Costs And Expenses CostsAndExpenses	97035000	USD
CY2016	us-gaap	Costs And Expenses CostsAndExpenses	302955000	USD
CY2017Q1	us-gaap	Costs And Expenses CostsAndExpenses	83917000	USD
CY2017Q2	us-gaap	Costs And Expenses CostsAndExpenses	86476000	USD
CY2017Q3	us-gaap	Costs And Expenses CostsAndExpenses	82124000	USD
CY2017Q4	us-gaap	Costs And Expenses CostsAndExpenses	86172000	USD
CY2017	us-gaap	Costs And Expenses CostsAndExpenses	338689000	USD
CY2015	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	20497000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	22115000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	20661000	USD
CY2015	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	443000	USD
CY2016	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1275000	USD
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1101000	USD
CY2015	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	609000	USD
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	884000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	495000	USD
CY2015	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-170798000	USD
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-2198000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	43678000	USD
CY2015	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	25000	USD
CY2016	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-5988000	USD
CY2017	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-2041000	USD
CY2015	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-172706000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-7116000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	39535000	USD
CY2016Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	16932000	USD
CY2017Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	18272000	USD
CY2015	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1933000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-271000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-43000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	184141000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	200971000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	156742000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	149269000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	168342000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	159099000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	11439000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	16335000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	120660000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	157051000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	17426000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	7979000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	12268000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	8766000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	23529000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	50911000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	11600000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	9830000	USD
CY2015	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	2100000	USD
CY2016	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	2000000	USD
CY2017	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	2300000	USD
CY2017	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.06
CY2017	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	0.50
CY2017	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Percent DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent	0.60
CY2015	us-gaap	Depreciation Depreciation	12379000	USD
CY2016	us-gaap	Depreciation Depreciation	12965000	USD
CY2017	us-gaap	Depreciation Depreciation	13275000	USD
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.84
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.06
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.21
CY2015	us-gaap	Earnings Per Share Basic Undistributed EarningsPerShareBasicUndistributed	1.84
CY2016Q1	us-gaap	Earnings Per Share Basic Undistributed EarningsPerShareBasicUndistributed	0.02
CY2016Q4	us-gaap	Earnings Per Share Basic Undistributed EarningsPerShareBasicUndistributed	-0.03
CY2016Q2	us-gaap	Earnings Per Share Basic Undistributed EarningsPerShareBasicUndistributed	0.04
CY2016Q3	us-gaap	Earnings Per Share Basic Undistributed EarningsPerShareBasicUndistributed	0.04
CY2016	us-gaap	Earnings Per Share Basic Undistributed EarningsPerShareBasicUndistributed	0.06
CY2017Q1	us-gaap	Earnings Per Share Basic Undistributed EarningsPerShareBasicUndistributed	0.03
CY2017Q2	us-gaap	Earnings Per Share Basic Undistributed EarningsPerShareBasicUndistributed	0.02
CY2017Q3	us-gaap	Earnings Per Share Basic Undistributed EarningsPerShareBasicUndistributed	0.07
CY2017Q4	us-gaap	Earnings Per Share Basic Undistributed EarningsPerShareBasicUndistributed	-0.33
CY2017	us-gaap	Earnings Per Share Basic Undistributed EarningsPerShareBasicUndistributed	-0.21
CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.80
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.06
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.21
CY2015	us-gaap	Earnings Per Share Diluted Undistributed EarningsPerShareDilutedUndistributed	1.80
CY2016Q1	us-gaap	Earnings Per Share Diluted Undistributed EarningsPerShareDilutedUndistributed	0.02
CY2016Q2	us-gaap	Earnings Per Share Diluted Undistributed EarningsPerShareDilutedUndistributed	0.03
CY2016Q3	us-gaap	Earnings Per Share Diluted Undistributed EarningsPerShareDilutedUndistributed	0.04
CY2016Q4	us-gaap	Earnings Per Share Diluted Undistributed EarningsPerShareDilutedUndistributed	-0.03
CY2016	us-gaap	Earnings Per Share Diluted Undistributed EarningsPerShareDilutedUndistributed	0.06
CY2017Q1	us-gaap	Earnings Per Share Diluted Undistributed EarningsPerShareDilutedUndistributed	0.03
CY2017Q2	us-gaap	Earnings Per Share Diluted Undistributed EarningsPerShareDilutedUndistributed	0.02
CY2017Q3	us-gaap	Earnings Per Share Diluted Undistributed EarningsPerShareDilutedUndistributed	0.07
CY2017Q4	us-gaap	Earnings Per Share Diluted Undistributed EarningsPerShareDilutedUndistributed	-0.33
CY2017	us-gaap	Earnings Per Share Diluted Undistributed EarningsPerShareDilutedUndistributed	-0.21
CY2015	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-117000	USD
CY2016	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-1565000	USD
CY2017	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	2139000	USD
CY2015	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-2.510
CY2016	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.699
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	1.558
CY2015	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-2.878
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.000
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.525
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.000
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.000
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.506
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.004
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.041
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.028
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.053
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.348
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.149
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.006
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.010
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.014
CY2015	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.015
CY2016	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.018
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.007
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Foreign EffectiveIncomeTaxRateReconciliationTaxCreditsForeign	0.341
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Foreign EffectiveIncomeTaxRateReconciliationTaxCreditsForeign	0.970
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Foreign EffectiveIncomeTaxRateReconciliationTaxCreditsForeign	0.501
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.023
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.083
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.039
CY2016Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	14177000	USD
CY2017Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	17091000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1300000	USD
CY2015	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	747000	USD
CY2016	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	1196000	USD
CY2017	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	0	USD
CY2015	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	747000	USD
CY2016	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	1196000	USD
CY2017	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	0	USD
CY2016	us-gaap	Fair Value Inputs Long Term Revenue Growth Rate FairValueInputsLongTermRevenueGrowthRate	0.03
CY2017	us-gaap	Fair Value Inputs Long Term Revenue Growth Rate FairValueInputsLongTermRevenueGrowthRate	0.03
CY2016Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	194777000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	240480000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	30382000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	1331000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	12683000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	19220000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	19942000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	86622000	USD
CY2015	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	3670000	USD
CY2016	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	0	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-227000	USD
CY2015	us-gaap	Gain Loss On Disposition Of Intangible Assets GainLossOnDispositionOfIntangibleAssets	3686000	USD
CY2016	us-gaap	Gain Loss On Disposition Of Intangible Assets GainLossOnDispositionOfIntangibleAssets	0	USD
CY2017	us-gaap	Gain Loss On Disposition Of Intangible Assets GainLossOnDispositionOfIntangibleAssets	533000	USD
CY2015	us-gaap	Gain Loss Related To Litigation Settlement GainLossRelatedToLitigationSettlement	2040000	USD
CY2016	us-gaap	Gain Loss Related To Litigation Settlement GainLossRelatedToLitigationSettlement	579000	USD
CY2017	us-gaap	Gain Loss Related To Litigation Settlement GainLossRelatedToLitigationSettlement	0	USD
CY2015	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2016	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2017	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-1082000	USD
CY2015Q4	us-gaap	Goodwill Goodwill	116899000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	204794000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	209661000	USD
CY2016	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	93641000	USD
CY2017	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	803000	USD
CY2016	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	5746000	USD
CY2017	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-4064000	USD
CY2016Q4	us-gaap	Goodwill Gross GoodwillGross	226564000	USD
CY2017Q4	us-gaap	Goodwill Gross GoodwillGross	231431000	USD
CY2016Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	21770000	USD
CY2017Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	21770000	USD
CY2016	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2017	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2015	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
CY2016	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	18300000	USD
CY2017	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	58498000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	38211000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	46031000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	60231000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	22637000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	40989000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	1733000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-15574000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-5042000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	60231000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	22637000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	40989000	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-151157000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	15817000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	63851000	USD
CY2015	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	21679000	USD
CY2016	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	26787000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	22733000	USD
CY2015	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-2621000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	2373000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-651000	USD
CY2015	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	10407000	USD
CY2016	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-5797000	USD
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	1110000	USD
CY2015	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	3107000	USD
CY2016	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	7313000	USD
CY2017	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	607000	USD
CY2015	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	3412000	USD
CY2016	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-1748000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-473000	USD
CY2015	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-2150000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-1694000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	5564000	USD
CY2015	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	1042000	USD
CY2016	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	6205000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-4354000	USD
CY2017Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	5100000	USD
CY2016Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	327165000	USD
CY2017Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	332202000	USD
CY2016Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	132388000	USD
CY2017Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	91722000	USD
CY2015	us-gaap	Interest Expense InterestExpense	12413000	USD
CY2016	us-gaap	Interest Expense InterestExpense	12745000	USD
CY2017	us-gaap	Interest Expense InterestExpense	13720000	USD
CY2015	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	1224000	USD
CY2016	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	1740000	USD
CY2017	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	1384000	USD
CY2015	us-gaap	Interest Paid Net InterestPaidNet	1553000	USD
CY2016	us-gaap	Interest Paid Net InterestPaidNet	1553000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	1553000	USD
CY2016Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	1244000	USD
CY2017Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	1074000	USD
CY2016Q4	us-gaap	Inventory Net InventoryNet	5633000	USD
CY2017Q4	us-gaap	Inventory Net InventoryNet	5159000	USD
CY2016Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	3773000	USD
CY2017Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	2976000	USD
CY2016Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	616000	USD
CY2017Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	1109000	USD
CY2015	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	2700000	USD
CY2016	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	3800000	USD
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	4400000	USD
CY2016Q4	us-gaap	Liabilities Liabilities	230714000	USD
CY2017Q4	us-gaap	Liabilities Liabilities	319488000	USD
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	783496000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	891072000	USD
CY2016Q4	us-gaap	Liabilities Current LiabilitiesCurrent	51301000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	132842000	USD
CY2015	us-gaap	Marketable Securities Unrealized Gain Loss MarketableSecuritiesUnrealizedGainLoss	766000	USD
CY2016	us-gaap	Marketable Securities Unrealized Gain Loss MarketableSecuritiesUnrealizedGainLoss	-396000	USD
CY2017	us-gaap	Marketable Securities Unrealized Gain Loss MarketableSecuritiesUnrealizedGainLoss	613000	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-88580000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	2701000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	46445000	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	1091000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-105208000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-75471000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	77244000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	95602000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	117437000	USD
CY2015	us-gaap	Net Income Loss NetIncomeLoss	211388000	USD
CY2016Q1	us-gaap	Net Income Loss NetIncomeLoss	1878000	USD
CY2016Q2	us-gaap	Net Income Loss NetIncomeLoss	3876000	USD
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	4511000	USD
CY2016Q4	us-gaap	Net Income Loss NetIncomeLoss	-3445000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	6820000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	3006000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	2605000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	7695000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	-36168000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	-22862000	USD
CY2017	us-gaap	New Accounting Pronouncement Or Change In Accounting Principle Effect Of Change On Net Income NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnNetIncome	38243000	USD
CY2015	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	240000	USD
CY2016	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	576000	USD
CY2017	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	1092000	USD
CY2015	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-11189000	USD
CY2016	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-11005000	USD
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-13418000	USD
CY2015	us-gaap	Operating Income Loss OperatingIncomeLoss	71420000	USD
CY2016Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	9294000	USD
CY2016Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	12008000	USD
CY2016Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	11816000	USD
CY2016Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	524000	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	33642000	USD
CY2017Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	13434000	USD
CY2017Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	8244000	USD
CY2017Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	17010000	USD
CY2017Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	15719000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	54407000	USD
CY2016Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	10399000	USD
CY2017Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	9414000	USD
CY2016Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	2749000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	4543000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	9000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-13485000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	7798000	USD
CY2016Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	3617000	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	4107000	USD
CY2015	us-gaap	Payments For Hedge Financing Activities PaymentsForHedgeFinancingActivities	0	USD
CY2016	us-gaap	Payments For Hedge Financing Activities PaymentsForHedgeFinancingActivities	0	USD
CY2017	us-gaap	Payments For Hedge Financing Activities PaymentsForHedgeFinancingActivities	33523000	USD
CY2015	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	100113000	USD
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	50038000	USD
CY2015	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2016	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2017	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	3277000	USD
CY2015	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	802000	USD
CY2016	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	3064000	USD
CY2017	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	5099000	USD
CY2015	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	157811000	USD
CY2016	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	54869000	USD
CY2017	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	102497000	USD
CY2015	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2016	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	202523000	USD
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2015	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	0	USD
CY2016	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	0	USD
CY2017	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	120000	USD
CY2015	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	6132000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	8556000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	9385000	USD
CY2016Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2017Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
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	17867000	USD
CY2017Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	11317000	USD
CY2015	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	0	USD
CY2016	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	0	USD
CY2017	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	172500000	USD
CY2015	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	13783000	USD
CY2016	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	15436000	USD
CY2017	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	15826000	USD
CY2015	us-gaap	Proceeds From Issuance Of Warrants ProceedsFromIssuanceOfWarrants	0	USD
CY2016	us-gaap	Proceeds From Issuance Of Warrants ProceedsFromIssuanceOfWarrants	0	USD
CY2017	us-gaap	Proceeds From Issuance Of Warrants ProceedsFromIssuanceOfWarrants	23173000	USD
CY2015	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	112721000	USD
CY2016	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	110081000	USD
CY2017	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	32048000	USD
CY2015	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	48380000	USD
CY2016	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	50546000	USD
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	4450000	USD
CY2015	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	3933000	USD
CY2016	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	113000	USD
CY2017	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	33000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	138647000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	141109000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	58442000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	54303000	USD
CY2015	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	0	USD
CY2016	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	0	USD
CY2017	us-gaap	Repayments Of Senior Debt RepaymentsOfSeniorDebt	72257000	USD
CY2016	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	26052000	USD
CY2017	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	36509000	USD
CY2015	us-gaap	Sales Revenue Net SalesRevenueNet	296278000	USD
CY2016Q1	us-gaap	Sales Revenue Net SalesRevenueNet	72682000	USD
CY2016Q2	us-gaap	Sales Revenue Net SalesRevenueNet	76501000	USD
CY2015	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	111110000	USD
CY2016	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	129844000	USD
CY2017	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	149135000	USD
CY2015	us-gaap	Restructuring Charges RestructuringCharges	3576000	USD
CY2016	us-gaap	Restructuring Charges RestructuringCharges	0	USD
CY2017	us-gaap	Restructuring Charges RestructuringCharges	0	USD
CY2015	us-gaap	Restructuring Costs RestructuringCosts	583000	USD
CY2016	us-gaap	Restructuring Costs RestructuringCosts	0	USD
CY2017	us-gaap	Restructuring Costs RestructuringCosts	0	USD
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-615051000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-636227000	USD
CY2015	us-gaap	Royalty Revenue RoyaltyRevenue	262415000	USD
CY2016	us-gaap	Royalty Revenue RoyaltyRevenue	264614000	USD
CY2017	us-gaap	Royalty Revenue RoyaltyRevenue	289594000	USD
CY2015	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	17321000	USD
CY2016Q3	us-gaap	Sales Revenue Net SalesRevenueNet	89855000	USD
CY2016Q4	us-gaap	Sales Revenue Net SalesRevenueNet	97559000	USD
CY2016	us-gaap	Sales Revenue Net SalesRevenueNet	336597000	USD
CY2017Q1	us-gaap	Sales Revenue Net SalesRevenueNet	97351000	USD
CY2017Q2	us-gaap	Sales Revenue Net SalesRevenueNet	94720000	USD
CY2017Q3	us-gaap	Sales Revenue Net SalesRevenueNet	99134000	USD
CY2017Q4	us-gaap	Sales Revenue Net SalesRevenueNet	101891000	USD
CY2017	us-gaap	Sales Revenue Net SalesRevenueNet	393096000	USD
CY2015	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	70554000	USD
CY2016	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	95145000	USD
CY2017	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	110940000	USD
CY2015	us-gaap	Share Based Compensation ShareBasedCompensation	15096000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	21013000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	27403000	USD
CY2017Q4	us-gaap	Share Price SharePrice	14.56
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Expiration Period SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod	P10Y
CY2017Q4	us-gaap	Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Amount Of Unrecorded Benefit SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit	200000	USD
CY2015	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	13077000	USD
CY2016	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	12297000	USD
CY2017	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	10733000	USD
CY2015Q1	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	20000000.0	shares
CY2017Q4	us-gaap	Stock Repurchase Program Remaining Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased	7400000	shares
CY2015	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	7812000	shares
CY2016Q2	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	736000	shares
CY2017Q2	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	3187000	shares
CY2017Q4	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	830000	shares
CY2015	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	80000000	USD
CY2017Q2	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	40000000	USD
CY2017	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	36557000	USD
CY2014Q4	us-gaap	Stockholders Equity StockholdersEquity	391622000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	526533000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	552782000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	571584000	USD
CY2017Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	11500000	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	19903000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	20836000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	21925000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	22652000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	35000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	171000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	372000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	218000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	221000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2015	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1186000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1225000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1083000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	256000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	16000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	2200000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	2200000	USD
CY2017Q4	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	21527000	USD
CY2015	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	2670000	shares
CY2016	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	2978000	shares
CY2017	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	117484000	shares
CY2016Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	112252000	shares
CY2016Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	112061000	shares
CY2016Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	113723000	shares
CY2016Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	110788000	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	113140000	shares
CY2017Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	115325000	shares
CY2017Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	112565000	shares
CY2017Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	113119000	shares
CY2017Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	109737000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	110198000	shares
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	114814000	shares
CY2016Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	109733000	shares
CY2016Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	109904000	shares
CY2016Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	110214000	shares
CY2016Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	110788000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	110162000	shares
CY2017Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	111464000	shares
CY2017Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	110060000	shares
CY2017Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	109555000	shares
CY2017Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	109737000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	110198000	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-bottom:10px;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Credit Concentration</font></div><div style="line-height:120%;padding-bottom:10px;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">As of </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">December 31, 2017</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">2016</font><font style="font-family:inherit;font-size:10pt;">, the Company’s cash, cash equivalents and marketable securities were invested with various financial institutions in the form of corporate notes, bonds and commercial paper, money market funds, U.S. Treasuries, U.S. Government Agencies, and municipal bonds and notes. The Company’s exposure to market risk for changes in interest rates relates primarily to its investment portfolio. The Company places its investments with high credit issuers and, by investment policy, attempts to limit the amount of credit exposure to any one issuer. As stated in the Company’s investment policy, it will ensure the safety and preservation of the Company’s invested funds by limiting default risk and market risk. The Company has no investments denominated in foreign country currencies and therefore is not subject to foreign exchange risk from these assets.</font></div><div style="line-height:120%;padding-bottom:10px;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Company mitigates default risk by investing in high credit quality securities and by positioning its portfolio to respond appropriately to a significant reduction in a credit rating of any investment issuer or guarantor. The portfolio includes only marketable securities with active secondary or resale markets to enable portfolio liquidity.</font></div><div style="line-height:120%;padding-bottom:10px;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The</font><font style="font-family:inherit;font-size:10pt;color:#222222;"> Company’s note hedge transactions, entered into in connection with the 1.375% convertible senior notes due 2023 (the "2023 Notes"), expose the Company to credit risk to the extent that its counterparties may be unable to meet the terms of the transactions. The Company mitigates this risk by limiting its counterparties to major financial institutions. </font><font style="font-family:inherit;font-size:10pt;">See Note 10, "Convertible Notes" for further details.</font></div><div style="line-height:120%;padding-bottom:10px;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Company's accounts receivable are derived from revenue earned from customers located in the U.S. and internationally. See Note 6, "Segments and Major Customers" for further details.</font></div></div>
CY2017	us-gaap	Nature Of Operations NatureOfOperations	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:10px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Formation and Business of the Company</font></div><div style="line-height:120%;padding-bottom:10px;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Rambus Inc. (the “Company” or “Rambus”) was incorporated in California in March 1990 and reincorporated in Delaware in March 1997. In addition to licensing, the Company is creating new business opportunities through offering products and services where its goal is to perpetuate strong company operating performance and long-term stockholder value. The Company generates revenue by licensing its inventions and solutions, selling its semiconductor products and providing services to market-leading companies.</font></div><div style="line-height:120%;padding-bottom:10px;text-align:left;text-indent:17px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Building upon the foundation of technologies for memory, SerDes and other chip interfaces, the Company has expanded its portfolio of inventions and solutions to address chip and system security, mobile payments and smart ticketing. The Company intends to continue its growth into new technology fields, consistent with its mission to create value through its innovations and to make those technologies available through the shipment of products, the delivery of services, and the Company's licensing business models. Key to its efforts is continuing to hire and retain world-class inventors, scientists and engineers to lead the development and deployment of inventions and technology solutions for its fields of focus.</font></div></div>
CY2017	us-gaap	Reclassifications Reclassifications	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:10px;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Reclassifications</font></div><div style="line-height:120%;padding-bottom:10px;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Certain prior year balances were reclassified to conform to the current year’s presentation. None of these reclassifications had an impact on reported net income or cash flows for any of the periods presented. </font></div><div style="line-height:120%;padding-bottom:10px;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;"></font></div></div>
CY2017	us-gaap	Revenue Recognition Long Term Contracts RevenueRecognitionLongTermContracts	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">For development contracts related to licenses of its solutions that involve significant engineering and integration services, the Company uses the proportional performance method. The measurement of progress to completion is based on actual man-months incurred during the reporting period, not to exceed the billable project acceptances received. Contract costs are recognized as incurred. Maintenance and support revenue includes minimal hours of post-implementation customer support that is recognized ratably over the support period.</font></div><div style="line-height:120%;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;"></font></div></div>
CY2017	us-gaap	Revenue Recognition Sales Of Goods RevenueRecognitionSalesOfGoods	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:10px;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Product revenue is recognized upon shipment of product to customers, net of accruals for estimated sales returns and allowances, which to date, have not been significant. However, some of the Company’s sales are made through distributors under arrangements that allow for price protection or rights of return on product unsold by the distributors. Product revenue on sales made through distributors with rights of return or price protection is deferred until the distributors sell the product to end customers. Sales to distributors are included in deferred revenue and the Company defers the related costs until sale to the end customers occurs. Price protection rights allow distributors the right to a credit in the event of declines in the price of the Company’s product that they hold prior to the sale to an end customer. In the event that the Company reduces the selling price of products held by distributors, deferred revenue related to distributors with price protection rights is reduced upon notification to the customer of the price change. The Company’s sales to direct customers are made primarily pursuant to standard purchase orders for delivery of products. The Company generally allows customers to cancel or change purchase orders within limited notice periods prior to the scheduled shipment.</font></div></div>
CY2017	us-gaap	Revenue Recognition Services Royalty Fees RevenueRecognitionServicesRoyaltyFees	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:10px;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Royalty Revenue</font></div><div style="line-height:120%;padding-bottom:10px;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Rambus generally recognizes royalty revenue upon notification by its customers and when deemed collectible. The terms of the royalty agreements generally either require customers to give Rambus notification and to pay the royalties within a specified period or are based on a fixed royalty that is due within a specified period. Many of Rambus’ customers have the right to cancel their licenses. In such arrangements, revenue is only recognized to the extent that is consistent with the cancellation provisions. Cancellation provisions within such contracts generally provide for a prospective cancellation with no refund of fees already remitted by customers for products provided and payment for services rendered prior to the date of cancellation. Rambus has </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">two</font><font style="font-family:inherit;font-size:10pt;"> types of royalty revenue: (1) patent license royalties and (2) technology license royalties.</font></div><div style="line-height:120%;padding-bottom:10px;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Patent licenses - Rambus licenses its broad portfolio of patented inventions to companies who use these inventions in the development and manufacture of their own products. Such licensing agreements may cover the license of part, or all, of Rambus' patent portfolio. The contractual terms of the agreements generally provide for payments over an extended period of time. For the licensing agreements with fixed royalty payments, Rambus generally recognizes revenue from these arrangements as amounts become due. For the licensing agreements with variable royalty payments which can be based on either a percentage of sales or number of units sold, Rambus earns royalties at the time that the customers’ sales occur. Rambus’ customers, however, do not report and pay royalties owed for sales in any given quarter until after the conclusion of that quarter. As Rambus is unable to estimate the customers’ sales in any given quarter to determine the royalties due to Rambus, it recognizes royalty revenues based on royalties reported by customers during the quarter and when other revenue recognition criteria are met.</font></div><div style="line-height:120%;padding-bottom:10px;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">In addition, Rambus may enter into certain settlements of patent infringement disputes. The amount of consideration received upon any settlement (including but not limited to past royalty payments, future royalty payments and punitive damages) is allocated to each element of the settlement based on the fair value of each element. In addition, revenues related to past royalties are recognized upon execution of the agreement by both parties, provided that the amounts are fixed or determinable, there are no significant undelivered obligations and collectability is reasonably assured. Rambus does not recognize any revenues prior to execution of the agreement since there is no reliable basis on which it can estimate the amounts for royalties related to previous periods or assess collectability. Elements that are related to royalty revenue in nature (including but not limited to past royalty payments and future royalty payments) will be recorded as royalty revenue in the consolidated statements of operations. Elements that are not related to royalty revenue in nature (including but not limited to punitive damage and settlement) will be recorded as gain from settlement which is reflected as a separate line item within the operating expenses section in the consolidated statements of operations.</font></div><div style="line-height:120%;padding-bottom:10px;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Technology licenses - Rambus develops proprietary and industry-standard products that it provides to its customers under technology license agreements. These arrangements include royalties, which can be based on either a percentage of sales or number of units sold. Rambus earns royalties on such licensed products sold worldwide by its customers at the time that the customers’ sales occur. Rambus’ customers, however, do not report and pay royalties owed for sales in any given quarter until after the conclusion of that quarter. As Rambus is unable to estimate the customers’ sales in any given quarter to determine the royalties due to Rambus, it recognizes royalty revenues based on royalties reported by customers during the quarter and when other revenue recognition criteria are met. </font></div></div>
CY2017	us-gaap	Revenue Recognition Software RevenueRecognitionSoftware	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:10px;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">For software arrangements that include multiple elements, including software licenses, professional services and maintenance services, Rambus allocates and defers revenue for the undelivered items (typically only the maintenance services) based on the VSOE, and recognizes the difference between the total arrangement fee and the amount deferred for the undelivered item(s) as revenue. VSOE of fair value of each maintenance element is based on the contractual stated renewal rate for that maintenance element. When VSOE of fair value does not exist for undelivered items, the entire arrangement fee is recognized ratably over the performance period.</font></div><div style="line-height:120%;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">For software arrangements, the Company uses the percentage-of-completion method for contracts that involve the implementation of software solutions and that qualify for percentage-of-completion revenue accounting (e.g. software arrangements that contain a PCS element that has VSOE of fair value established and that have no refund rights that would allow a customer refunds of fees paid under the arrangement). Revenue is recognized based on man-days incurred during the reporting period as compared to the estimated total man-days necessary for each contract, not to exceed the billable project acceptances received, with deferral of corresponding contract costs, if applicable. Should a loss be anticipated on a contract, the full amount of the loss would be recorded when the loss is determinable. Maintenance and support revenue includes post-implementation customer support and the right to unspecified software updates and enhancements on a when and if available basis. The Company recognizes revenue from maintenance arrangements ratably over the period in which the services are provided.</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-bottom:10px;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Use of Estimates</font></div><div style="line-height:120%;padding-bottom:10px;text-align:left;text-indent:18px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates.</font></div></div>

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RAMBUS INC Stock $rmbs

2017 Q4 Form 10-K Financial Statement

#000091727318000007 Filed on February 23, 2018

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2017 Q4 Form 10-K Financial Statement

#000091727318000007 Filed on February 23, 2018

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RAMBUS INC Stock $rmbs