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v2.4.1.9

Income Taxes (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income before taxes |  |  |
Domestic | $ 49,173 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic | $ (12,535)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic | $ (61,036)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
Foreign | 1,077 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign | 518 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign | (56,849)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
Income (loss) before income taxes | 50,250 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | (12,017)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | (117,885)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Federal: |  |  |
Current | 19,386 us-gaap_CurrentFederalTaxExpenseBenefit | 19,319 us-gaap_CurrentFederalTaxExpenseBenefit | 15,048 us-gaap_CurrentFederalTaxExpenseBenefit
Deferred | 2,337 us-gaap_DeferredFederalIncomeTaxExpenseBenefit | 2,200 us-gaap_DeferredFederalIncomeTaxExpenseBenefit | 587 us-gaap_DeferredFederalIncomeTaxExpenseBenefit
State: |  |  |
Current | 713 us-gaap_CurrentStateAndLocalTaxExpenseBenefit | 47 us-gaap_CurrentStateAndLocalTaxExpenseBenefit | (2,868)us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Deferred | 0 us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit | (501)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit | 2,934 us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Foreign: |  |  |
Current | 1,640 us-gaap_CurrentForeignTaxExpenseBenefit | 446 us-gaap_CurrentForeignTaxExpenseBenefit | 543 us-gaap_CurrentForeignTaxExpenseBenefit
Deferred | (27)us-gaap_DeferredForeignIncomeTaxExpenseBenefit | 220 us-gaap_DeferredForeignIncomeTaxExpenseBenefit | 207 us-gaap_DeferredForeignIncomeTaxExpenseBenefit
Provision for (benefit from) income taxes | 24,049 us-gaap_IncomeTaxExpenseBenefit | 21,731 us-gaap_IncomeTaxExpenseBenefit | 16,451 us-gaap_IncomeTaxExpenseBenefit
Effective income tax rate reconciliation |  |  |
Expense (benefit) at U.S. federal statutory rate (as a percent) | 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | (35.00%)us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | (35.00%)us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Expense (benefit) at state statutory rate (as a percent) | 1.00%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes | (3.30%)us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes | 0.10%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
Withholding tax (as a percent) | 38.60%rmbs_EffectiveIncomeTaxRateReconciliationWithholdingTax | 160.40%rmbs_EffectiveIncomeTaxRateReconciliationWithholdingTax | 13.30%rmbs_EffectiveIncomeTaxRateReconciliationWithholdingTax
Foreign rate differential (as a percent) | 2.50%us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential | 4.10%us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential | 17.40%us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
Research and development ("R&D") credit (as a percent) | (6.10%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch | (36.70%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch | 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch
Executive compensation (as a percent) | 0.20%rmbs_EffectiveIncomeTaxRateReconciliationExecutiveCompensation | 0.80%rmbs_EffectiveIncomeTaxRateReconciliationExecutiveCompensation | 0.30%rmbs_EffectiveIncomeTaxRateReconciliationExecutiveCompensation
Non-deductible stock-based compensation (as a percent) | 1.40%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost | 2.50%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost | 0.70%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost
Foreign tax credit (as a percent) | (38.70%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsForeign | (163.30%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsForeign | (13.30%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsForeign
Capitalized merger and acquisition costs (as a percent) | 0.00%rmbs_EffectiveIncomeTaxRateReconciliationCapitalizedMergerAndAcquisitionCosts | 0.00%rmbs_EffectiveIncomeTaxRateReconciliationCapitalizedMergerAndAcquisitionCosts | 0.30%rmbs_EffectiveIncomeTaxRateReconciliationCapitalizedMergerAndAcquisitionCosts
Other (as a percent) | 0.60%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments | (1.00%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments | (2.20%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Valuation allowance (as a percent) | 13.40%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance | 252.30%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance | 32.40%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance
Effective tax rate (as a percent) | 47.90%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 180.80%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 14.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations
Components of net deferred tax assets |  |  |
Depreciation and amortization | 29,099 rmbs_DeferredTaxAssetsDepreciationAndAmortization | 28,093 rmbs_DeferredTaxAssetsDepreciationAndAmortization |
Other liabilities and reserves | 9,916 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther | 18,578 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther |
Deferred equity compensation | 29,511 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost | 33,837 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost |
Net operating loss carryovers | 12,307 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards | 27,752 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards |
Tax credits | 116,658 us-gaap_DeferredTaxAssetsTaxCreditCarryforwards | 100,052 us-gaap_DeferredTaxAssetsTaxCreditCarryforwards |
Total gross deferred tax assets | 197,491 us-gaap_DeferredTaxAssetsGross | 208,312 us-gaap_DeferredTaxAssetsGross |
Convertible debt | (8,092)rmbs_DeferredTaxLiabilitiesConvertibleDebt | (13,000)rmbs_DeferredTaxLiabilitiesConvertibleDebt |
Total net deferred tax assets | 189,399 rmbs_DeferredTaxAssetsNetBeforeDeductingValuationAllowance | 195,312 rmbs_DeferredTaxAssetsNetBeforeDeductingValuationAllowance |
Valuation allowance | (193,874)us-gaap_DeferredTaxAssetsValuationAllowance | (192,823)us-gaap_DeferredTaxAssetsValuationAllowance |
Net deferred tax assets | (4,475)us-gaap_DeferredTaxAssetsLiabilitiesNet | 2,489 us-gaap_DeferredTaxAssetsLiabilitiesNet |
Net deferred tax assets reported as: |  |  |
Current deferred tax assets | 187 us-gaap_DeferredTaxAssetsNetCurrent | 205 us-gaap_DeferredTaxAssetsNetCurrent |
Deferred Tax Liabilities, Net | (1,131)us-gaap_DeferredTaxLiabilitiesCurrent | (791)us-gaap_DeferredTaxLiabilitiesCurrent |
Non-current deferred tax assets | 536 us-gaap_DeferredTaxAssetsNetNoncurrent | 4,797 us-gaap_DeferredTaxAssetsNetNoncurrent |
Non-current deferred tax liabilities | (4,067)us-gaap_DeferredTaxLiabilitiesNoncurrent | (1,722)us-gaap_DeferredTaxLiabilitiesNoncurrent |
Net deferred tax assets | $ (4,475)us-gaap_DeferredTaxAssetsLiabilitiesNet | $ 2,489 us-gaap_DeferredTaxAssetsLiabilitiesNet |

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