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INTANGIBLE ASSETS AND GOODWILL (Tables) | 3 Months Ended
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Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of intangible assets | The Company's intangible assets at March 31, 2020 and December 31, 2019 consisted of the following (in thousands):
March 31, 2020 | Weighted average amortization period (years) |  | Cost |  | Accumulated amortization |  | Net carrying value
In-process research and development | * |  | $ | 36,600 |  |  | $ | — |  |  | $ | 36,600 |
Developed technology | 7.92 |  | 295,780 |  |  | 109,714 |  |  | 186,066 |
Customer relationships | 11.83 |  | 266,140 |  |  | 38,507 |  |  | 227,633 |
Trade names | 3.60 |  | 4,000 |  |  | 1,369 |  |  | 2,631 |
Internal use software | 3.00 |  | 730 |  |  | 730 |  |  | — |
| 9.13 |  | $ | 603,250 |  |  | $ | 150,320 |  |  | $ | 452,930 |
December 31, 2019 | Weighted average amortization period (years) |  | Cost |  | Accumulated amortization |  | Net carrying value
In-process research and development | * |  | $ | 5,600 |  |  | $ | — |  |  | $ | 5,600 |
Developed technology | 6.79 |  | 188,880 |  |  | 100,760 |  |  | 88,120 |
Customer relationships | 9.46 |  | 152,140 |  |  | 33,350 |  |  | 118,790 |
Trade names | 5.20 |  | 2,000 |  |  | 1,144 |  |  | 856 |
Internal use software | 3.00 |  | 730 |  |  | 730 |  |  | — |
| 7.82 |  | $ | 349,350 |  |  | $ | 135,984 |  |  | $ | 213,366 |
* An in-process research and development intangible asset has an indefinite life until the product is generally available, at which time such asset is typically reclassified to developed technology.
Schedule of amortization expense related to intangible assets | Amortization expense for intangible assets for the three months ended March 31, 2020 and 2019 was as follows (in thousands):
| Three months ended |  | Statement of operations classification
| March 31, 2020 |  | March 31, 2019 |
Developed technology | $ | 8,954 |  |  | $ | 9,645 |  |  | Cost of revenue - product
Customer relationships | 5,156 |  |  | 2,130 |  |  | Sales and marketing
Trade names | 224 |  |  | 147 |  |  | Sales and marketing
| $ | 14,334 |  |  | $ | 11,922 |  |  |
Schedule of estimated future amortization expense for intangible assets | Estimated future amortization expense for the Company's intangible assets at March 31, 2020 was as follows (in thousands):
Years ending December 31, |
Remainder of 2020 | $ | 44,869 |
2021 | 64,323 |
2022 | 58,153 |
2023 | 51,445 |
2024 | 43,477 |
Thereafter | 190,663 |
| $ | 452,930 |
Schedule of goodwill | The changes in the carrying value of the Company's goodwill in the three months ended March 31, 2020 and 2019 were as follows (in thousands):
Balance at January 1 | 2020 |  | 2019
Goodwill | $ | 392,302 |  |  | $ | 386,761 |
Accumulated impairment losses | (167,406 | ) |  | (3,106 | )
| 224,896 |  |  | 383,655 |
Acquisition of ECI | 189,493 |  |  | — |
Acquisition of Anova | — |  |  | 5,541 |
Balance at March 31 | $ | 414,389 |  |  | $ | 389,196 |
Balance at March 31 |  |  |
Goodwill | $ | 581,795 |  |  | $ | 392,302 |
Accumulated impairment losses | (167,406 | ) |  | (3,106 | )
| $ | 414,389 |  |  | $ | 389,196 |

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