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GOODWILL AND OTHER INTANGIBLE ASSETS (Summary of Intangible Assets) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Amortized intangible assets: |  |  |
Gross Carrying Amount | $ 146,103 | $ 130,112 |
Accumulated Amortization | (50,643) | (35,623) |
Net Value | 95,460 | 94,489 |
Aggregate amortization expense | 10,339 | 9,317 | $ 4,246
Future estimated amortization expense |  |  |
2018 | 11,024 |  |
2019 | 10,838 |  |
2020 | 9,621 |  |
2021 | 9,430 |  |
2022 and thereafter | $ 54,547 |  |
Weighted Average |  |  |
Amortized intangible assets: |  |  |
Amortization Period | 11 years 9 months 18 days |  |
Patents |  |  |
Amortized intangible assets: |  |  |
Gross Carrying Amount | $ 7,819 | 6,859 |
Accumulated Amortization | (7,806) | (6,839) |
Net Value | $ 13 | 20 |
Patents | Weighted Average |  |  |
Amortized intangible assets: |  |  |
Amortization Period | 2 months 12 days |  |
Technology |  |  |
Amortized intangible assets: |  |  |
Gross Carrying Amount | $ 47,571 | 41,731 |
Accumulated Amortization | (14,624) | (10,040) |
Net Value | $ 32,947 | 31,691 |
Technology | Weighted Average |  |  |
Amortized intangible assets: |  |  |
Amortization Period | 15 years |  |
Customer relationships |  |  |
Amortized intangible assets: |  |  |
Gross Carrying Amount | $ 68,886 | 63,006 |
Accumulated Amortization | (13,401) | (6,696) |
Net Value | $ 55,485 | 56,310 |
Customer relationships | Weighted Average |  |  |
Amortized intangible assets: |  |  |
Amortization Period | 12 years 2 months 12 days |  |
License agreements and other |  |  |
Amortized intangible assets: |  |  |
Gross Carrying Amount | $ 21,827 | 18,516 |
Accumulated Amortization | (14,812) | (12,048) |
Net Value | $ 7,015 | $ 6,468 |
License agreements and other | Weighted Average |  |  |
Amortized intangible assets: |  |  |
Amortization Period | 7 years 7 months 6 days |  |

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