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Subsequent Event (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Dec. 31, 2014 item | Sep. 30, 2014 | Oct. 10, 2014
Base Rate [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Variable basis spread | 0.50% |  |
LIBOR [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Variable basis spread | 1.00% |  |
Subsequent Event [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Subsequent event date |  | Oct. 10, 2014 |
Revolving credit facility, borrowing capacity |  |  | $ 150,000
Length of revolving credit facility, in years | 5 years |  |
Addtional borrowing capacity | $ 75,000 |  |
Consolidated total funded indebtedness to consolidated EBITDA ratio | 3.00 |  |
Consolidated EBITDA to cash interest expense ratio | 3.50 |  |
Subsequent Event [Member] | Minimum [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Quarterly commitment fee percentage | 0.20% |  |
Subsequent Event [Member] | Maximum [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Quarterly commitment fee percentage | 0.25% |  |
Subsequent Event [Member] | Base Rate [Member] | Minimum [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Variable basis spread | 0.25% |  |
Subsequent Event [Member] | Base Rate [Member] | Maximum [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Variable basis spread | 0.50% |  |
Subsequent Event [Member] | LIBOR [Member] | Minimum [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Variable basis spread | 1.25% |  |
Subsequent Event [Member] | LIBOR [Member] | Maximum [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Variable basis spread | 1.50% |  |

X
- Definition Consolidated EBITDA to cash interest expense ratio. + References No definition available. + Details
Name: | ddd_ConsolidatedEbitdaToCashInterestExpenseRatio
Namespace Prefix: | ddd_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

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- Definition Consolidated total funded indebtedness to consolidated EBITDA ratio. + References No definition available. + Details
Name: | ddd_ConsolidatedTotalFundedIndebtednessToConsolidatedEbitdaRatio
Namespace Prefix: | ddd_
Data Type: | xbrli:decimalItemType
Balance Type: | na
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- Definition Additonal borrowing capacity under the credit facility with certain terms and conditions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References No definition available. + Details
Name: | ddd_LineOfCreditFacilityAddtionalBorrowingCapacity
Namespace Prefix: | ddd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

X
- Definition Period remaining on line of credit facility before it terminates, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_LineOfCreditFacilityExpirationPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 855 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662 + Details
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