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Acquisitions (Fiscal Year 2015 Acquisitions) (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	3 Months Ended
	Feb. 09, 2015	Mar. 31, 2015	Apr. 02, 2015
Cimatron [Member]
Business Acquisition [Line Items]
Date of acquisition		Feb. 09, 2015
Cash paid for business acquisition	$ 77,984us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = ddd_CimatronMember
Business acquisition, ownership percentage	100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = ddd_CimatronMember
Robtec [Member]
Business Acquisition [Line Items]
Date of acquisition		Nov. 25, 2014
Business acquisition, ownership percentage		70.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = ddd_RobtecMember
Subsequent Event [Member] | Wuxi Easyway [Member]
Business Acquisition [Line Items]
Subsequent event date		Apr. 02, 2015
Business acquisition, ownership percentage			65.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = ddd_WuxiEasywayMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember

X

- 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

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-URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e845-128460



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- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

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

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-Name Accounting Standards Codification

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-URI http://asc.fasb.org/extlink&oid=6516133



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Date the event occurred after the balance sheet date but before financial statements are issues or available to be issued, in CCYY-MM-DD format.

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