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Intangible Assets (Tables) | 6 Months Ended
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Jun. 30, 2017
Intangible Assets [Abstract] |
Intangible Assets Other Than Goodwill |
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﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ | 2017 |  | 2016 |  |  |  |
﻿(in thousands) | Gross |  | Accumulated Amortization |  | Net |  | Gross |  | Accumulated Amortization |  | Net |  | Useful Life (in years) |  | Weighted Average Useful Life Remaining (in years)
﻿Intangible assets with finite lives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Customer relationships | $ | 106,238 |  | $ | (53,546) |  | $ | 52,692 |  | $ | 99,067 |  | $ | (46,252) |  | $ | 52,815 |  | 1-14 |  | 6
﻿Acquired technology |  | 55,492 |  |  | (34,822) |  |  | 20,670 |  |  | 52,881 |  |  | (27,543) |  |  | 25,338 |  | 1-16 |  | 4
﻿Trade names |  | 30,409 |  |  | (18,099) |  |  | 12,310 |  |  | 28,110 |  |  | (16,015) |  |  | 12,095 |  | 1-8 |  | 5
﻿Patent costs |  | 17,072 |  |  | (6,613) |  |  | 10,459 |  |  | 16,263 |  |  | (5,873) |  |  | 10,390 |  | 1-20 |  | 9
﻿Trade secrets |  | 19,569 |  |  | (10,537) |  |  | 9,032 |  |  | 19,134 |  |  | (9,383) |  |  | 9,751 |  | 7 |  | 4
﻿Acquired patents |  | 17,038 |  |  | (11,526) |  |  | 5,512 |  |  | 16,965 |  |  | (10,674) |  |  | 6,291 |  | 1-6 |  | 4
﻿Other |  | 25,586 |  |  | (21,250) |  |  | 4,336 |  |  | 23,431 |  |  | (18,610) |  |  | 4,821 |  | 2-4 |  | 2
﻿Total intangible assets | $ | 271,404 |  | $ | (156,393) |  | $ | 115,011 |  | $ | 255,851 |  | $ | (134,350) |  | $ | 121,501 |  | 1-20 |  | 4
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- Definition Schedule of Finite And Indefinite-Lived Intangible Assets [Table Text Block] + References No definition available. + Details
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Namespace Prefix: | ddd_
Data Type: | nonnum:textBlockItemType
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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration