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Commitments And Contingencies (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Commitments And Contingencies [Line Items]
Rent expense under operating leases	$ 10,427us-gaap_OperatingLeasesRentExpenseNet	$ 6,891us-gaap_OperatingLeasesRentExpenseNet	$ 4,968us-gaap_OperatingLeasesRentExpenseNet
Supply commitments, printer assembly	56,620us-gaap_SignificantSupplyCommitmentRemainingMinimumAmountCommitted	41,091us-gaap_SignificantSupplyCommitmentRemainingMinimumAmountCommitted
Accrued liability recorded for earnouts	9,155us-gaap_BusinessCombinationLiabilitiesArisingFromContingenciesAmountRecognized	5,578us-gaap_BusinessCombinationLiabilitiesArisingFromContingenciesAmountRecognized
Forecast [Member] | Put Option [Member]
Commitments And Contingencies [Line Items]
Aggregate amount to owner upon exercise	$ 8,872us-gaap_OptionIndexedToIssuersEquitySettlementAlternativesCashAtFairValue / us-gaap_OptionIndexedToIssuersEquityTypeAxis = us-gaap_PutOptionMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioForecastMember
Formlabs, Inc. and Kickstarter, Inc. [Member]
Commitments And Contingencies [Line Items]
Patents allegedly infringed	1us-gaap_LossContingencyPatentsAllegedlyInfringedNumber / us-gaap_LitigationCaseAxis = ddd_FormlabsIncAndKickstarterIncMember
Formlabs, Inc. [Member]
Commitments And Contingencies [Line Items]
Patents allegedly infringed	8us-gaap_LossContingencyPatentsAllegedlyInfringedNumber / us-gaap_LitigationCaseAxis = ddd_FormlabsIncMember
Formlabs, Inc. [Member] | Royalty Agreements [Member]
Commitments And Contingencies [Line Items]
Royalty revenue percentage to be paid to related party	8.00%ddd_RoyaltyRevenuePercentageToBePaidToRelatedParty / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_RoyaltyAgreementsMember / us-gaap_LitigationCaseAxis = ddd_FormlabsIncMember

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Royalty revenue percentage to be paid to related party.

+ References

No definition available.

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- Definition

The amount, measured at acquisition-date fair value, of all liabilities assumed that arise from contingencies and were recognized by the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (d)(1)

-URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472

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- Definition

Number of another entity's patents that the entity has allegedly infringed.

+ References

No definition available.

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- Definition

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717

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- Definition

Fair value of each cash settlement alternative for each freestanding option contract.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 40

-Section 50

-Paragraph 5

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6445032&loc=d3e90205-114008

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The floor amount as of the balance sheet date that the entity must expend to satisfy the terms of disclosed arrangements (excluding long-term commitments) in which the entity must commit resources to supply goods or services to one or more customers.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.25)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 25

-Article 5



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 19

-Article 7



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

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-Number 210

-Section 03

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.17)

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.(a)(19))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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