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Intangible Assets | 3 Months Ended
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Mar. 31, 2017
Intangible Assets [Abstract] |
Intangible Assets | ﻿ (5) Intangible Assets ﻿ Intangible assets, net, other than goodwill, as of March 31, 2017 and December 31, 2016 were as follows:
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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: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Patent costs | $ | 16,969 |  | $ | (6,337) |  | $ | 10,632 |  | $ | 16,263 |  | $ | (5,873) |  | $ | 10,390 |  | 1-20 |  | 9
﻿Acquired technology |  | 54,192 |  |  | (31,125) |  |  | 23,067 |  |  | 52,881 |  |  | (27,543) |  |  | 25,338 |  | 1-16 |  | 4
﻿Acquired patents |  | 16,982 |  |  | (11,093) |  |  | 5,889 |  |  | 17,047 |  |  | (9,454) |  |  | 7,593 |  | 1-6 |  | 4
﻿Customer relationships |  | 103,106 |  |  | (49,576) |  |  | 53,530 |  |  | 99,067 |  |  | (46,252) |  |  | 52,815 |  | 1-14 |  | 6
﻿Trade secrets |  | 19,254 |  |  | (9,926) |  |  | 9,328 |  |  | 19,530 |  |  | (7,919) |  |  | 11,611 |  | 7 |  | 4
﻿Trade names |  | 32,926 |  |  | (16,936) |  |  | 15,990 |  |  | 28,110 |  |  | (16,015) |  |  | 12,095 |  | 1-8 |  | 5
﻿Other |  | 23,971 |  |  | (19,813) |  |  | 4,158 |  |  | 22,953 |  |  | (21,294) |  |  | 1,659 |  | 2-4 |  | 2
﻿Total intangible assets | $ | 267,400 |  | $ | (144,806) |  | $ | 122,594 |  | $ | 255,851 |  | $ | (134,350) |  | $ | 121,501 |  | 1-20 |  | 4
﻿ Amortization expense related to intangible assets was $8,832 and $8,819 for the quarters ended March 31, 2017 and 2016, respectively.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 + Details
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