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Warranty Contracts (Schedule Of Recognized Warranty Revenue And Incurred Warranty Costs) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Warranty Contracts [Line Items] |  |  |
Product Warranty Period | 1 year |  |
Beginning Balance Deferred Warranty Revenue beginning balance | $ 11,914 | $ 9,141 | $ 4,081
Warranty Revenue Deferred | 16,191 | 17,185 | 14,681
Warranty Revenue Recognized | (16,600) | (14,412) | (9,621)
Ending Balance Deferred Warranty Revenue | 11,505 | 11,914 | 9,141
Warranty Costs Incurred | 12,336 | 12,620 | 9,262
Materials [Member] |  |  |
Warranty Contracts [Line Items] |  |  |
Warranty Costs Incurred | 6,202 | 5,958 | 4,441
Labor And Overhead [Member] |  |  |
Warranty Contracts [Line Items] |  |  |
Warranty Costs Incurred | $ 6,134 | $ 6,662 | $ 4,821

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- Definition Deferred warranty revenue. + References No definition available. + Details
Name: | ddd_DeferredWarrantyRevenue
Namespace Prefix: | ddd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Product Warranty Period + References No definition available. + Details
Name: | ddd_ProductWarrantyPeriod
Namespace Prefix: | ddd_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Warranty Contracts [Line Items] + References No definition available. + Details
Name: | ddd_WarrantyContractsLineItems
Namespace Prefix: | ddd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Warranty revenue deferred. + References No definition available. + Details
Name: | ddd_WarrantyRevenueDeferred
Namespace Prefix: | ddd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Warranty revenue recognized. + References No definition available. + Details
Name: | ddd_WarrantyRevenueRecognized
Namespace Prefix: | ddd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The expense charged against earnings for the period pertaining to standard and extended warranties on the entity's goods and services granted to customers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(3,4)) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
Name: | us-gaap_ProductWarrantyExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_IncomeStatementLocationAxis=ddd_MaterialsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_IncomeStatementLocationAxis=ddd_LaborAndOverheadMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |