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Earnings Per Share (Schedule Of Earnings Per Share Reconciliation) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	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
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income attributable to 3D Systems - numerator for basic net earnings per share									$ 11,637us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic	$ 44,107us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic		$ 38,941us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Numerator for dilutive earnings per share									11,637us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted	44,107us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted		38,941us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted
Weighted average shares - denominator for basic net earnings per share									108,023us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	98,393us-gaap_WeightedAverageNumberOfSharesOutstandingBasic		80,817us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Stock options and other equity compensation												906us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Denominator for dilutive net earnings per share									108,023us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	98,393us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding		81,723us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Earnings per share, basic and diluted	$ 0.01us-gaap_EarningsPerShareBasicAndDiluted	$ 0.03us-gaap_EarningsPerShareBasicAndDiluted	$ 0.02us-gaap_EarningsPerShareBasicAndDiluted	$ 0.05us-gaap_EarningsPerShareBasicAndDiluted	$ 0.11us-gaap_EarningsPerShareBasicAndDiluted	$ 0.17us-gaap_EarningsPerShareBasicAndDiluted	$ 0.10us-gaap_EarningsPerShareBasicAndDiluted	$ 0.06us-gaap_EarningsPerShareBasicAndDiluted	$ 0.11us-gaap_EarningsPerShareBasicAndDiluted	$ 0.45us-gaap_EarningsPerShareBasicAndDiluted		$ 0.48us-gaap_EarningsPerShareBasicAndDiluted
Interest expense excluded from diluted earnings per share calculation										$ 1,835ddd_InterestExpenseExcludedFromDilutedEarningsPerShare	[1]	$ 9,002ddd_InterestExpenseExcludedFromDilutedEarningsPerShare	[1]
5.5% Convertible notes shares excluded from diluted earnings per share calculation										1,764ddd_ConvertibleNotesSharesExcludedFromDilutedEarningsPerShare	[1]	5,957ddd_ConvertibleNotesSharesExcludedFromDilutedEarningsPerShare	[1]
Interest rate	5.50%us-gaap_DebtInstrumentInterestRateStatedPercentage								5.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
Senior Convertible Notes Due December 15, 2016 [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Interest rate	5.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember								5.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember
[1] Average outstanding diluted earnings per share calculation excludes shares that may be issued upon conversion of the outstanding senior convertible notes since the effect of their inclusion would have been anti-dilutive

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Contractual interest rate for funds borrowed, under the debt agreement.

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