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Intangible Assets (Tables) | 3 Months Ended
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Mar. 31, 2015
Intangible Assets [Abstract] |
Intangible Assets Other Than Goodwill |
| 2015 |  | 2014 |  |  |  |
(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 |  | 20,949 |  |  | (7,613) |  |  | 13,336 |  |  | 20,733 |  |  | (7,369) |  |  | 13,364 |  | 5-20 |  | 3
Acquired technology |  | 71,498 |  |  | (20,687) |  |  | 50,811 |  |  | 57,383 |  |  | (18,241) |  |  | 39,142 |  | 3-10 |  | 4
Internally developed software |  | 9,072 |  |  | (5,878) |  |  | 3,194 |  |  | 9,073 |  |  | (5,517) |  |  | 3,556 |  | 1-8 |  | <1
Customer relationships |  | 185,497 |  |  | (39,163) |  |  | 146,334 |  |  | 157,139 |  |  | (36,975) |  |  | 120,164 |  | 3-11 |  | 2
Non-compete agreements |  | 35,114 |  |  | (12,637) |  |  | 22,477 |  |  | 35,469 |  |  | (11,784) |  |  | 23,685 |  | 3-11 |  | 3
Trade names |  | 26,774 |  |  | (4,684) |  |  | 22,090 |  |  | 21,800 |  |  | (4,455) |  |  | 17,345 |  | 2-10 |  | 5
Other |  | 41,983 |  |  | (8,854) |  |  | 33,129 |  |  | 39,100 |  |  | (6,905) |  |  | 32,195 |  | 4-10 |  | 1
Intangible assets with indefinite lives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trademarks |  | 2,110 |  |  | — |  |  | 2,110 |  |  | 2,110 |  |  | — |  |  | 2,110 |  | N/A |  | N/A
Total intangible assets | $ | 398,872 |  | $ | (105,391) |  | $ | 293,481 |  | $ | 348,682 |  | $ | (97,121) |  | $ | 251,561 |  | 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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