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Segment Information (Schedule Of Long-Lived Assets By Geographic Area) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Segment Reporting Information [Line Items]    
Long-lived assets $ 945,280us-gaap_NoncurrentAssets $ 571,001us-gaap_NoncurrentAssets
Americas [Member]    
Segment Reporting Information [Line Items]    
Long-lived assets 570,049us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= us-gaap_AmericasMember
426,221us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= us-gaap_AmericasMember
Germany [Member]    
Segment Reporting Information [Line Items]    
Long-lived assets 19,994us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_DE
23,134us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= country_DE
Other EMEA [Member]    
Segment Reporting Information [Line Items]    
Long-lived assets 309,817us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= ddd_OtherEuropeMember
71,269us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= ddd_OtherEuropeMember
Asia Pacific [Member]    
Segment Reporting Information [Line Items]    
Long-lived assets $ 45,420us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaPacificMember
$ 50,377us-gaap_NoncurrentAssets
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaPacificMember