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Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2014
Intangible Assets [Abstract] |
Intangible Assets Other Than Goodwill |
|  | 2014 |  | 2013 |  |  |  |
(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: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Licenses |  | $ | 5,875 |  | $ | (5,875) |  | $ | — |  | $ | 5,875 |  | $ | (5,875) |  | $ | — |  | N/A |  | N/A
Patent costs |  |  | 20,733 |  |  | (7,369) |  |  | 13,364 |  |  | 21,545 |  |  | (5,960) |  |  | 15,585 |  | 5 - 20 |  | 3
Acquired technology |  |  | 57,383 |  |  | (18,241) |  |  | 39,142 |  |  | 30,095 |  |  | (13,615) |  |  | 16,480 |  | 3 - 10 |  | 4
Internally developed software |  |  | 9,073 |  |  | (5,517) |  |  | 3,556 |  |  | 18,097 |  |  | (12,863) |  |  | 5,234 |  | 1 - 8 |  | <1
Customer relationships |  |  | 157,139 |  |  | (36,975) |  |  | 120,164 |  |  | 95,793 |  |  | (18,283) |  |  | 77,510 |  | 3 - 11 |  | 2
Non-compete agreements |  |  | 35,469 |  |  | (11,784) |  |  | 23,685 |  |  | 16,848 |  |  | (6,666) |  |  | 10,182 |  | 3 - 11 |  | 3
Trade names |  |  | 21,800 |  |  | (4,455) |  |  | 17,345 |  |  | 9,302 |  |  | (2,211) |  |  | 7,091 |  | 2 - 10 |  | 5
Other |  |  | 39,100 |  |  | (6,905) |  |  | 32,195 |  |  | 11,598 |  |  | (4,081) |  |  | 7,517 |  | 4 - 10 |  | 1
Intangible assets with indefinite lives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trademarks |  |  | 2,110 |  |  | — |  |  | 2,110 |  |  | 2,110 |  |  | — |  |  | 2,110 |  | N/A |  | N/A
Total intangible assets |  | $ | 348,682 |  | $ | (97,121) |  | $ | 251,561 |  | $ | 211,263 |  | $ | (69,554) |  | $ | 141,709 |  | 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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- Details
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