v2.4.1.9

INCOME TAXES (Details 3) (USD $) | 12 Months Ended |
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2014
Income taxes (payable) receivable and deferred tax (liabilities) assets include in the Balance Sheet captions [Line Items] |  |  |  |
Increase in valuation allowance | $ 36,000,000 us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount |  |  |
Valuation allowance related to portion of tax loss carryforwards and other items | 98,300,000 iaci_DeferredTaxAssetsValuationAllowanceAmount |  |  |
Federal statutory rate (as a percent) | 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate | 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate |
Reconciliation of income tax (benefit) provision to amounts computed by applying statutory federal income tax rate to earnings (loss) from continuing operations before income taxes |  |  |  |
Income tax provision at the federal statutory rate of 35% | 94,475,000 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | 145,705,000 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | 101,172,000 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate |
Change in tax reserves, net | (86,151,000)us-gaap_IncomeTaxReconciliationTaxContingenciesOther | 1,791,000 us-gaap_IncomeTaxReconciliationTaxContingenciesOther | 17,703,000 us-gaap_IncomeTaxReconciliationTaxContingenciesOther |
Foreign income taxed at a different statutory tax rate | (8,943,000)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential | (17,428,000)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential | (16,240,000)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential |
State income taxes, net of effect of federal tax benefit | 7,240,000 us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | 7,469,000 us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | 7,650,000 us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes |
Non-deductible goodwill associated with the sale of Urbanspoon | 6,982,000 us-gaap_IncomeTaxReconciliationDispositionOfBusiness |  |  |
Non-deductible impairments for certain cost method investments | 23,310,000 us-gaap_IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses | 1,756,000 us-gaap_IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses | 226,000 us-gaap_IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses |
Other, net | (1,541,000)us-gaap_IncomeTaxReconciliationOtherAdjustments | (4,791,000)us-gaap_IncomeTaxReconciliationOtherAdjustments | 8,704,000 us-gaap_IncomeTaxReconciliationOtherAdjustments |
Income tax provision | 35,372,000 us-gaap_IncomeTaxExpenseBenefit | 134,502,000 us-gaap_IncomeTaxExpenseBenefit | 119,215,000 us-gaap_IncomeTaxExpenseBenefit |
Undistributed earnings indefinitely reinvested outside United States | 605,700,000 us-gaap_UndistributedEarningsOfForeignSubsidiaries |  |  |
Deferred tax liabilities related to non-indefinitely reinvested earnings | 141,500,000 iaci_DeferredTaxLiabilitiesRepatriationOfForeignEarnings |  |  |
Reconciliation of beginning and ending amount of unrecognized tax benefits, excluding interest |  |  |  |
Balance at January 1 | 275,813,000 us-gaap_UnrecognizedTaxBenefits | 379,281,000 us-gaap_UnrecognizedTaxBenefits | 351,561,000 us-gaap_UnrecognizedTaxBenefits |
Additions based on tax positions related to the current year | 2,159,000 us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions | 2,887,000 us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions | 6,278,000 us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions |
Additions for tax positions of prior years | 1,622,000 us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions | 3,189,000 us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions | 45,287,000 us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions |
Reductions for tax positions of prior years | (5,611,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions | (17,116,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions | (17,545,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions |
Settlements | (5,092,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities | (78,954,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities | (5,349,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities |
Expiration of applicable statutes of limitations | (238,505,000)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations | (13,474,000)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations | (951,000)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations |
Balance at December 31 | 30,386,000 us-gaap_UnrecognizedTaxBenefits | 275,813,000 us-gaap_UnrecognizedTaxBenefits | 379,281,000 us-gaap_UnrecognizedTaxBenefits |
Total unrecognized tax benefits including interest |  |  |  | 374,800,000 iaci_UnrecognizedTaxBenefitsRelatedToFederalIncomeTaxesStatutesOfLimitationsExpiringRecognizedThisQuarter
Unrecognized Tax Benefits Related To Federal Income Taxes Statutes Of Limitations Expiring Recognized This Quarter That Impacted Income Tax Benefit (Provision) Continuing Operations | 88,200,000 iaci_UnrecognizedTaxBenefitsRelatedToFederalIncomeTaxesStatutesOfLimitationsExpiringRecognizedThisQuarterThatImpactedIncomeTaxBenefitProvisionContinuingOperations |  |  |
Unrecognized Tax Benefits Related To Federal Income Taxes Statutes Of Limitations Expiring Recognized This Quarter That Impacted Income Tax Benefit (Provision) Discontinued Operations | 175,700,000 iaci_UnrecognizedTaxBenefitsRelatedtoFederalIncomeTaxesStatutesofLimitationsExpiringRecognizedThisQuarterThatImpactedIncomeTaxBenefitProvisionDiscontinuedOperations |  |  |
Portion of unrecognized tax benefits related to deferred tax assets included in other non-current assets | 110,900,000 iaci_UnrecognizedTaxBenefitsRelatedToFederalIncomeTaxesStatutesOfLimitationsExpiringRecognizedThisQuarterThatImpactedBalanceSheet |  |  |
Unrecognized tax benefits included in accrued expenses and other current liabilities | 100,100,000 iaci_UnrecognizedTaxBenefitsRelatedToFederalIncomeTaxesStatutesOfLimitationsExpiringRecognizedThisQuarterThatImpactedNonCurrentDeferredTaxAssets |  |  |
Unrecognized Tax Benefits Including Tax Interest Accrued | 33,200,000 iaci_UnrecognizedTaxBenefitsIncludingTaxInterestAccrued | 408,800,000 iaci_UnrecognizedTaxBenefitsIncludingTaxInterestAccrued |  |
Unrecognized tax benefits, tax positions for which the ultimate deductibility is highly certain but timing is uncertain | 30,500,000 iaci_UnrecognizedTaxBenefitsUnrelatedToFederalIncomeTaxesStatuteOfLimitationsExpiringToBeRecognizedInSubsequentPeriodsThatWouldIncomeImpactTaxExpenseContinuingOperations |  |  |
Change In Unrecognized Tax Benefits Unrelated To The Federal Income Taxes Statute Of Limitations Expiring Reasonably Possible Within Twelve Months Of The Current Reporting Period | 8,800,000 iaci_ChangeInUnrecognizedTaxBenefitsUnrelatedToTheFederalIncomeTaxesStatuteOfLimitationsExpiringReasonablyPossibleWithinTwelveMonthsOfTheCurrentReportingPeriod |  |  |
Change In Unrecognized Tax Benefits Unrelated To The Federal Income Taxes Statute Of Limitations Expiring Reasonably Possible Within Twelve Months Of The Current Reporting Period, Income Tax Provision | 8,400,000 iaci_ChangeInUnrecognizedTaxBenefitsUnrelatedToTheFederalIncomeTaxesStatuteOfLimitationsExpiringReasonablyPossibleWithinTwelveMonthsOfTheCurrentReportingPeriodIncomeTaxProvision |  |  |
Deferred taxes related to interest on unrecognized tax benefits from continuing operations | 35,300,000 iaci_DeferredIncomeTaxesForInterestOnUnrecognizedTaxBenefitsContinuingOperations | 2,800,000 iaci_DeferredIncomeTaxesForInterestOnUnrecognizedTaxBenefitsContinuingOperations | 3,100,000 iaci_DeferredIncomeTaxesForInterestOnUnrecognizedTaxBenefitsContinuingOperations |
Deferred taxes related to interest on unrecognized tax benefits from discontinued operations | 11,700,000 iaci_DeferredIncomeTaxesForInterestOnUnrecognizedTaxBenefitsDiscontinuedOperations | 800,000 iaci_DeferredIncomeTaxesForInterestOnUnrecognizedTaxBenefitsDiscontinuedOperations | 1,700,000 iaci_DeferredIncomeTaxesForInterestOnUnrecognizedTaxBenefitsDiscontinuedOperations |
Accrued interest on unrecognized tax benefits | 2,800,000 us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued | 133,000,000 us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued |  |
Accrued penalties on unrecognized tax benefits | 2,900,000 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued | 5,100,000 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued |  |
Other current assets | 166,742,000 us-gaap_OtherAssetsCurrent | 161,530,000 us-gaap_OtherAssetsCurrent |  |
Other non-current assets | 56,693,000 us-gaap_OtherAssetsNoncurrent | 164,685,000 us-gaap_OtherAssetsNoncurrent |  |
Accrued Liabilities, Current | (397,803,000)us-gaap_AccruedLiabilitiesCurrent | (351,038,000)us-gaap_AccruedLiabilitiesCurrent |  |
Income taxes payable | (32,635,000)us-gaap_AccruedIncomeTaxesNoncurrent | (416,384,000)us-gaap_AccruedIncomeTaxesNoncurrent |  |
Deferred income taxes | (409,529,000)us-gaap_DeferredTaxLiabilitiesNoncurrent | (320,748,000)us-gaap_DeferredTaxLiabilitiesNoncurrent |  |
Net deferred tax liabilities | (390,411,000)us-gaap_DeferredTaxAssetsLiabilitiesNet | (286,596,000)us-gaap_DeferredTaxAssetsLiabilitiesNet |  |
Deferred Tax (Liabilities) Assets |  |  |  |
Reconciliation of beginning and ending amount of unrecognized tax benefits, excluding interest |  |  |  |
Other current assets | 17,993,000 us-gaap_OtherAssetsCurrent / iaci_DeferredtaxliabilitiesassetsAxis = iaci_DeferredTaxLiabilitiesAssetsMember | 34,381,000 us-gaap_OtherAssetsCurrent / iaci_DeferredtaxliabilitiesassetsAxis = iaci_DeferredTaxLiabilitiesAssetsMember |  |
Other non-current assets | 1,380,000 us-gaap_OtherAssetsNoncurrent / iaci_DeferredtaxliabilitiesassetsAxis = iaci_DeferredTaxLiabilitiesAssetsMember | 26,000 us-gaap_OtherAssetsNoncurrent / iaci_DeferredtaxliabilitiesassetsAxis = iaci_DeferredTaxLiabilitiesAssetsMember |  |
Accrued Liabilities, Current | (255,000)us-gaap_AccruedLiabilitiesCurrent / iaci_DeferredtaxliabilitiesassetsAxis = iaci_DeferredTaxLiabilitiesAssetsMember | (255,000)us-gaap_AccruedLiabilitiesCurrent / iaci_DeferredtaxliabilitiesassetsAxis = iaci_DeferredTaxLiabilitiesAssetsMember |  |
Deferred income taxes | (409,529,000)us-gaap_DeferredTaxLiabilitiesNoncurrent / iaci_DeferredtaxliabilitiesassetsAxis = iaci_DeferredTaxLiabilitiesAssetsMember | (320,748,000)us-gaap_DeferredTaxLiabilitiesNoncurrent / iaci_DeferredtaxliabilitiesassetsAxis = iaci_DeferredTaxLiabilitiesAssetsMember |  |
Net deferred tax liabilities | (390,411,000)us-gaap_DeferredTaxAssetsLiabilitiesNet / iaci_DeferredtaxliabilitiesassetsAxis = iaci_DeferredTaxLiabilitiesAssetsMember | (286,596,000)us-gaap_DeferredTaxAssetsLiabilitiesNet / iaci_DeferredtaxliabilitiesassetsAxis = iaci_DeferredTaxLiabilitiesAssetsMember |  |
Income Taxes (Payable) Receivable |  |  |  |
Reconciliation of beginning and ending amount of unrecognized tax benefits, excluding interest |  |  |  |
Other current assets | 4,505,000 us-gaap_OtherAssetsCurrent / iaci_IncometaxespayablereceivableAxis = iaci_IncomeTaxesPayableReceivableMember | 12,242,000 us-gaap_OtherAssetsCurrent / iaci_IncometaxespayablereceivableAxis = iaci_IncomeTaxesPayableReceivableMember |  |
Other non-current assets | 1,478,000 us-gaap_OtherAssetsNoncurrent / iaci_IncometaxespayablereceivableAxis = iaci_IncomeTaxesPayableReceivableMember | 19,217,000 us-gaap_OtherAssetsNoncurrent / iaci_IncometaxespayablereceivableAxis = iaci_IncomeTaxesPayableReceivableMember |  |
Accrued Liabilities, Current | (41,157,000)us-gaap_AccruedLiabilitiesCurrent / iaci_IncometaxespayablereceivableAxis = iaci_IncomeTaxesPayableReceivableMember | (16,159,000)us-gaap_AccruedLiabilitiesCurrent / iaci_IncometaxespayablereceivableAxis = iaci_IncomeTaxesPayableReceivableMember |  |
Income taxes payable | (32,635,000)us-gaap_AccruedIncomeTaxesNoncurrent / iaci_IncometaxespayablereceivableAxis = iaci_IncomeTaxesPayableReceivableMember | (416,384,000)us-gaap_AccruedIncomeTaxesNoncurrent / iaci_IncometaxespayablereceivableAxis = iaci_IncomeTaxesPayableReceivableMember |  |
Net income taxes payable | 67,809,000 iaci_Netincometaxespayable / iaci_IncometaxespayablereceivableAxis = iaci_IncomeTaxesPayableReceivableMember | 401,084,000 iaci_Netincometaxespayable / iaci_IncometaxespayablereceivableAxis = iaci_IncomeTaxesPayableReceivableMember |  |
Continuing Operations [Member] |  |  |  |
Reconciliation of beginning and ending amount of unrecognized tax benefits, excluding interest |  |  |  |
Unrecognized Tax Benefits, Interest on Income Taxes Expense | 58,500,000 us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense / iaci_ContinuingOperationsorDiscontinuedOperationsAxis = us-gaap_SegmentContinuingOperationsMember | 4,800,000 us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense / iaci_ContinuingOperationsorDiscontinuedOperationsAxis = us-gaap_SegmentContinuingOperationsMember | 5,200,000 us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense / iaci_ContinuingOperationsorDiscontinuedOperationsAxis = us-gaap_SegmentContinuingOperationsMember |
Discontinued Operations [Member] |  |  |  |
Reconciliation of beginning and ending amount of unrecognized tax benefits, excluding interest |  |  |  |
Unrecognized Tax Benefits, Interest on Income Taxes Expense | $ 19,700,000 us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense / iaci_ContinuingOperationsorDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember | $ 1,400,000 us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense / iaci_ContinuingOperationsorDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember | $ 2,800,000 us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense / iaci_ContinuingOperationsorDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |

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