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Acquisitions (Fiscal Year 2013 Acquisitions) (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | 0 Months Ended | 3 Months Ended | 12 Months Ended | 0 Months Ended |
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Nov. 26, 2014 | Apr. 02, 2014 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Jan. 09, 2013 | Feb. 27, 2013 | May 02, 2014 | May 02, 2013 | Aug. 06, 2013 | Aug. 20, 2013 | Sep. 06, 2013 | Dec. 04, 2013 | Dec. 13, 2013 | Dec. 23, 2013 | Dec. 31, 2013 | Feb. 18, 2014 | Jul. 15, 2013
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Date of acquisition |  |  |  |  |  |  |  |  |  |  | Dec. 17, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of the consideration paid |  | $ 69,026 us-gaap_BusinessCombinationConsiderationTransferred1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash paid for business acquisition | 54,552 us-gaap_PaymentsToAcquireBusinessesGross | 51,526 us-gaap_PaymentsToAcquireBusinessesGross |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value of shares paid for acquisition |  | 17,500 us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  | 187,438 us-gaap_SalesRevenueNet | 166,944 us-gaap_SalesRevenueNet | 151,512 us-gaap_SalesRevenueNet | 147,758 us-gaap_SalesRevenueNet | 154,817 us-gaap_SalesRevenueNet | 135,717 us-gaap_SalesRevenueNet | 120,787 us-gaap_SalesRevenueNet | 102,079 us-gaap_SalesRevenueNet | 653,652 us-gaap_SalesRevenueNet | 513,400 us-gaap_SalesRevenueNet | 353,633 us-gaap_SalesRevenueNet |  |  |  |  |  |  |  |  |  |  |  |  |
Operating income (loss) |  |  | 4,228 us-gaap_OperatingIncomeLoss | 8,208 us-gaap_OperatingIncomeLoss | 4,362 us-gaap_OperatingIncomeLoss | 9,517 us-gaap_OperatingIncomeLoss | 17,976 us-gaap_OperatingIncomeLoss | 28,570 us-gaap_OperatingIncomeLoss | 16,796 us-gaap_OperatingIncomeLoss | 17,519 us-gaap_OperatingIncomeLoss | 26,315 us-gaap_OperatingIncomeLoss | 80,861 us-gaap_OperatingIncomeLoss | 60,571 us-gaap_OperatingIncomeLoss |  |  |  |  |  |  |  |  |  |  |  |  |
COWEB [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Date of acquisition |  |  |  |  |  |  |  |  |  |  | Jan. 09, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = ddd_CowebMember |  |  |  |  |  |  |  |  |  |  |  |
Cash paid for business acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  | 262 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = ddd_CowebMember |  |  |  |  |  |  |  |  |  |  |  |
Geomagic [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Date of acquisition |  |  |  |  |  |  |  |  |  |  | Feb. 27, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = ddd_GeomagicMember |  |  |  |  |  |  |  |  |  |  |
Cash paid for business acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 52,687 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = ddd_GeomagicMember |  |  |  |  |  |  |  |  |  |  |
Rapid Product Development Group, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Date of acquisition |  |  |  |  |  |  |  |  |  |  | May 01, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of the consideration paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 44,413 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = ddd_RapidProductDevelopmentGroupIncMember |  |  |  |  |  |  |  |  |
Cash paid for business acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 33,163 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = ddd_RapidProductDevelopmentGroupIncMember |  |  |  |  |  |  |  |  |
Value of shares paid for acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,750 us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable / us-gaap_BusinessAcquisitionAxis = ddd_RapidProductDevelopmentGroupIncMember |  |  |  |  |  |  |  |  |
Business acquisition, deferred consideration payment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,500 ddd_BusinessAcquisitionDeferredConsiderationPayment / us-gaap_BusinessAcquisitionAxis = ddd_RapidProductDevelopmentGroupIncMember |  |  |  |  |  |  |  |  |  |
Deferred cash payments to acquire businesses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,750 ddd_DeferredCashPaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = ddd_RapidProductDevelopmentGroupIncMember |  |  |  |  |  |  |  |  |  |
Deferred value of shares paid for acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 750 ddd_DeferredValueOfSharesPaidForAcquisition / us-gaap_BusinessAcquisitionAxis = ddd_RapidProductDevelopmentGroupIncMember |  |  |  |  |  |  |  |  |  |
Duration of time before deferred purchase price paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 months |  |  |  |  |  |  |  |  |  |
Phenix Systems [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Date of acquisition |  |  |  |  |  |  |  |  |  |  | Jul. 15, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, ownership percentage |  |  | 95.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = ddd_PhenixSystemsMember |  |  |  |  |  |  |  | 95.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = ddd_PhenixSystemsMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 82.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = ddd_PhenixSystemsMember
Cash paid for business acquisition |  |  |  |  |  |  |  |  |  |  | 16,975 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = ddd_PhenixSystemsMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
VisPower Technology Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Date of acquisition |  |  |  |  |  |  |  |  |  |  | Aug. 06, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = ddd_VisPowerTechnologyIncMember |  |  |  |  |  |  |  |
Cash paid for business acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,998 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = ddd_VisPowerTechnologyIncMember |  |  |  |  |  |  |  |
CDRM, Ltd. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Date of acquisition |  |  |  |  |  |  |  |  |  |  | Aug. 20, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = ddd_CdrmLtdMember |  |  |  |  |  |  |
Cash paid for business acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,399 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = ddd_CdrmLtdMember |  |  |  |  |  |  |
The Sugar Lab [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Date of acquisition |  |  |  |  |  |  |  |  |  |  | Sep. 06, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of the consideration paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,500 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = ddd_SugarLabMember |  |  |  |  |  |
Cash paid for business acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = ddd_SugarLabMember |  |  |  |  |  |
Value of shares paid for acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 500 us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable / us-gaap_BusinessAcquisitionAxis = ddd_SugarLabMember |  |  |  |  |  |
Figulo [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Date of acquisition |  |  |  |  |  |  |  |  |  |  | Dec. 04, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = ddd_FiguloMember |  |  |  |  |
Fair value of the consideration paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,846 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = ddd_FiguloMember |  |  |  |  |
Cash paid for business acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,996 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = ddd_FiguloMember |  |  |  |  |
Value of shares paid for acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 850 us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable / us-gaap_BusinessAcquisitionAxis = ddd_FiguloMember |  |  |  |  |
Village Plastics Co. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Date of acquisition |  |  |  |  |  |  |  |  |  |  | Dec. 13, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = ddd_VillagePlasticsCoMember |  |  |  |
Fair value of the consideration paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,361 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = ddd_VillagePlasticsCoMember |  |  |  |
Cash paid for business acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,361 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = ddd_VillagePlasticsCoMember |  |  |  |
Value of shares paid for acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,000 us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable / us-gaap_BusinessAcquisitionAxis = ddd_VillagePlasticsCoMember |  |  |  |
Gentle Giant Studios [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Date of acquisition |  |  |  |  |  |  |  |  |  |  | Dec. 23, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = ddd_GentleGiantStudiosMember |  |  |
Fair value of the consideration paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,650 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = ddd_GentleGiantStudiosMember |  |  |
Cash paid for business acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,975 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = ddd_GentleGiantStudiosMember |  |  |
Value of shares paid for acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,675 us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable / us-gaap_BusinessAcquisitionAxis = ddd_GentleGiantStudiosMember |  |  |
Xerox Corporation Wilsonville, Oregon [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Date of acquisition |  |  |  |  |  |  |  |  |  |  | Dec. 31, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash paid for business acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 32,500 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = ddd_XeroxCorporationWilsonvilleOregonMember |  |
Digital PlaySpace, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Date of acquisition |  |  |  |  |  |  |  |  |  |  | Feb. 18, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of the consideration paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = ddd_DigitalPlayspaceIncMember |
Cash paid for business acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = ddd_DigitalPlayspaceIncMember |
Value of shares paid for acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,000 us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable / us-gaap_BusinessAcquisitionAxis = ddd_DigitalPlayspaceIncMember |

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- Definition Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e845-128460 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Acquisition Date -URI http://asc.fasb.org/extlink&oid=6919109 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e848-128460 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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