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Income Taxes (Narrative) (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Taxes [Line Items] |  |  |
Effective tax rate | 31.30%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 31.10%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 10.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations
Adjustment of valuation allowance (reverse) |  |  | $ (12,388,000)us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Difference between effective tax rate and federal statutory | 3.70%ddd_DifferenceBetweenEffectiveTaxRateAndFederalStatutory | 3.90%ddd_DifferenceBetweenEffectiveTaxRateAndFederalStatutory |
Net operating loss carryforwards | 38,338,000 us-gaap_OperatingLossCarryforwards | 52,177,000 us-gaap_OperatingLossCarryforwards | 42,202,000 us-gaap_OperatingLossCarryforwards
Non-cash income tax benefit from reversal of valuation allowance |  |  | (5,372,000)us-gaap_OtherIncomeTaxExpenseBenefitContinuingOperations
Valuation allowance | 0 us-gaap_DeferredTaxAssetsValuationAllowance |  |
Increase (decrease) in deferred income tax assets valuation allowance |  |  | (8,781,000)us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Deferred income tax assets | 4,474,000 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves | 5,725,000 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves | 1,949,000 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves
Loss carryforwards, U.S. federal income tax purposes | 5,092,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic | 6,856,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic | 0 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic
Loss carryforwards, U.S. state income tax purposes | 26,365,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal | 38,934,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal | 41,047,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal
Loss carryforwards, U.S. foreign income tax purposes | 6,881,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign | 6,387,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign | 1,155,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign
Operating loss carryforwards, expiration beginning period | Dec. 31, 2022 |  |
Alternative minimum tax credit carryforwards |  |  | 7,602,000 us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax
Unremitted earnings of foreign subsidiaries | 23,628,000 us-gaap_UndistributedEarningsOfForeignSubsidiaries |  |
Accrued interest and expense from unrecognized tax benefits | 110,000 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued |  |
Decrease of unrecognized tax benefits |  | (459,000)us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease |
Period that no additional unrecognized tax benefits anticipated | 12 months |  |
Operating Loss Carryforwards | 38,338,000 us-gaap_OperatingLossCarryforwards | 52,177,000 us-gaap_OperatingLossCarryforwards | 42,202,000 us-gaap_OperatingLossCarryforwards
U.S. Deferred Tax Assets [Member] |  |  |
Income Taxes [Line Items] |  |  |
Increase (decrease) in deferred income tax assets valuation allowance |  | (8,781,000)us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance / us-gaap_ValuationAllowanceByDeferredTaxAssetAxis = ddd_USDeferredTaxAssetsMember |
U.S. Internal Revenue Service [Member] | Minimum [Member] |  |  |
Income Taxes [Line Items] |  |  |
Tax years subject to examination | 2011 |  |
U.S. Internal Revenue Service [Member] | Maximum [Member] |  |  |
Income Taxes [Line Items] |  |  |
Tax years subject to examination | 2014 |  |
U.S. Internal Revenue Service, Loss Carryforward [Member] | Minimum [Member] |  |  |
Income Taxes [Line Items] |  |  |
Tax years subject to examination | 1997 |  |
U.S. Internal Revenue Service, Loss Carryforward [Member] | Maximum [Member] |  |  |
Income Taxes [Line Items] |  |  |
Tax years subject to examination | 2007 |  |
Australia Tax Authority [Member] |  |  |
Income Taxes [Line Items] |  |  |
Tax years subject to examination | 2009 |  |
Belgium Tax Authority [Member] |  |  |
Income Taxes [Line Items] |  |  |
Tax years subject to examination | 2010 |  |
Secretariat of the Federal Revenue Bureau of Brazil [Member] |  |  |
Income Taxes [Line Items] |  |  |
Tax years subject to examination | 2014 |  |
China Tax Authority [Member] |  |  |
Income Taxes [Line Items] |  |  |
Tax years subject to examination | 2010 |  |
France Tax Authority [Member] |  |  |
Income Taxes [Line Items] |  |  |
Tax years subject to examination | 2011 |  |
German Tax Authority [Member] |  |  |
Income Taxes [Line Items] |  |  |
Tax years subject to examination | 2011 |  |
India Tax Authority [Member] |  |  |
Income Taxes [Line Items] |  |  |
Tax years subject to examination | 2012 |  |
Israel Tax Authority [Member] |  |  |
Income Taxes [Line Items] |  |  |
Tax years subject to examination | 2010 |  |
Italy Tax Authority [Member] |  |  |
Income Taxes [Line Items] |  |  |
Tax years subject to examination | 2009 |  |
Japan Tax Authority [Member] |  |  |
Income Taxes [Line Items] |  |  |
Tax years subject to examination | 2007 |  |
Korea Tax Authority [Member] |  |  |
Income Taxes [Line Items] |  |  |
Tax years subject to examination | 2008 |  |
Mexican Tax Authority [Member] |  |  |
Income Taxes [Line Items] |  |  |
Tax years subject to examination | 2014 |  |
Netherlands Tax Authority [Member] |  |  |
Income Taxes [Line Items] |  |  |
Tax years subject to examination | 2007 |  |
Switzerland Tax Authority [Member] |  |  |
Income Taxes [Line Items] |  |  |
Tax years subject to examination | 2008 |  |
United Kingdom Tax Authority [Member] |  |  |
Income Taxes [Line Items] |  |  |
Tax years subject to examination | 2009 |  |
Uruguay Tax Authority [Member] |  |  |
Income Taxes [Line Items] |  |  |
Tax years subject to examination | 2014 |  |
U.S. State Income Tax [Member] |  |  |
Income Taxes [Line Items] |  |  |
Research and experimentation tax credit carryforwards | 2,196,000 us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | 2,040,000 us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | 2,040,000 us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember
Other tax credits | 615,000 us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsOther / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | 615,000 us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsOther / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember | 615,000 us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsOther / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember
Tax credit carryforward beginning expiration date | Dec. 31, 2017 |  |
U.S. State Income Tax [Member] | Minimum [Member] |  |  |
Income Taxes [Line Items] |  |  |
Operating loss carryforwards, expiration beginning period | Dec. 31, 2020 |  |
Foreign Income Tax [Member] |  |  |
Income Taxes [Line Items] |  |  |
Research and experimentation tax credit carryforwards | 518,000 us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember | 58,000 us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember |
Foreign Income Tax [Member] | Minimum [Member] |  |  |
Income Taxes [Line Items] |  |  |
Operating loss carryforwards, expiration beginning period | Dec. 31, 2018 |  |
Federal And State Income Tax [Member] |  |  |
Income Taxes [Line Items] |  |  |
Research and experimentation tax credit carryforwards |  |  | $ 735,000 us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch / us-gaap_IncomeTaxAuthorityAxis = ddd_FederalAndStateIncomeTaxMember
Tax credit carryforward beginning expiration date | Dec. 31, 2017 |  |
Federal And State Income Tax [Member] | Minimum [Member] |  |  |
Income Taxes [Line Items] |  |  |
Tax credit carryforward beginning expiration date | Dec. 31, 2017 |  |

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