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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	38,338,000us-gaap_OperatingLossCarryforwards	52,177,000us-gaap_OperatingLossCarryforwards	42,202,000us-gaap_OperatingLossCarryforwards
Non-cash income tax benefit from reversal of valuation allowance			(5,372,000)us-gaap_OtherIncomeTaxExpenseBenefitContinuingOperations
Valuation allowance	0us-gaap_DeferredTaxAssetsValuationAllowance
Increase (decrease) in deferred income tax assets valuation allowance			(8,781,000)us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Deferred income tax assets	4,474,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves	5,725,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves	1,949,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves
Loss carryforwards, U.S. federal income tax purposes	5,092,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic	6,856,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic	0us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic
Loss carryforwards, U.S. state income tax purposes	26,365,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	38,934,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	41,047,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal
Loss carryforwards, U.S. foreign income tax purposes	6,881,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign	6,387,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign	1,155,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign
Operating loss carryforwards, expiration beginning period	Dec. 31, 2022
Alternative minimum tax credit carryforwards			7,602,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax
Unremitted earnings of foreign subsidiaries	23,628,000us-gaap_UndistributedEarningsOfForeignSubsidiaries
Accrued interest and expense from unrecognized tax benefits	110,000us-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	38,338,000us-gaap_OperatingLossCarryforwards	52,177,000us-gaap_OperatingLossCarryforwards	42,202,000us-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	2,196,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember	2,040,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember	2,040,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember
Other tax credits	615,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsOther / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember	615,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsOther / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember	615,000us-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	518,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember	58,000us-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			$ 735,000us-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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