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INTANGIBLE ASSETS AND GOODWILL (Tables) | 12 Months Ended
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Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of intangible assets | The Company's intangible assets at December 31, 2022 and 2021 consisted of the following (in thousands):
December 31, 2022 | Weighted average amortization period (years) |  | Cost |  | Accumulated amortization |  | Net carrying value
Developed technology | 7.84 |  | $ | 340,380 |  |  | $ | 212,448 |  |  | $ | 127,932 |
Customer relationships | 11.86 |  | 268,140 |  |  | 106,385 |  |  | 161,755 |
Trade names | 3.88 |  | 5,000 |  |  | 4,658 |  |  | 342 |
Software licenses | 3.00 |  | 5,186 |  |  | 487 |  |  | 4,699 |
| 9.51 |  | $ | 618,706 |  |  | $ | 323,978 |  |  | $ | 294,728 |
December 31, 2021 | Weighted average amortization period (years) |  | Cost |  | Accumulated amortization |  | Net carrying value
In-process research and development | * |  | $ | 34,000 |  |  | $ | — |  |  | $ | 34,000 |
Developed technology | 7.93 |  | 306,380 |  |  | 181,393 |  |  | 124,987 |
Customer relationships | 11.86 |  | 268,140 |  |  | 77,653 |  |  | 190,487 |
Trade names | 3.88 |  | 5,000 |  |  | 3,744 |  |  | 1,256 |
Internal use software | 3.00 |  | 730 |  |  | 730 |  |  | — |
| 9.17 |  | $ | 614,250 |  |  | $ | 263,520 |  |  | $ | 350,730 |
* 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 and the Company begins to amortize the asset. In the fourth quarter of 2022, the Company reclassified an in-process research and development intangible asset to developed technology, as the associated products and features related to 5G technology became generally available.
Schedule of estimated future amortization expense for intangible assets | Estimated future amortization expense for the Company's intangible assets at December 31, 2022 was as follows (in thousands):
Years ending December 31, |
2023 | $ | 56,882 |
2024 | 50,717 |
2025 | 44,006 |
2026 | 38,965 |
2027 | 33,936 |
Thereafter | 70,222 |
| $ | 294,728 |
Schedule of goodwill | The changes in the carrying value of the Company's goodwill in the years ended December 31, 2022 and 2021 were as follows (in thousands):
| Cloud and Edge |  | IP Optical Networks |  | Total
Balance at January 1, 2021 (1) | $ | 224,896 |  |  | $ | 191,996 |  |  | $ | 416,892 |
Impairment of goodwill | — |  |  | (116,000) |  |  | (116,000) |
Balance at December 31, 2021 (1)(2) | 224,896 |  |  | 75,996 |  |  | 300,892 |
Activity | — |  |  | — |  |  | — |
Balance at December 31, 2022 (1)(2) | $ | 224,896 |  |  | $ | 75,996 |  |  | $ | 300,892 |
(1) Balance is presented net of accumulated impairment losses of $167.4 million for the Cloud and Edge segment. (2) Balance is presented net of an impairment loss of $116.0 million for the IP Optical Networks segment. The components of goodwill at December 31, 2021 and 2022 were as follows (in thousands):
| Cloud and Edge |  | IP Optical Networks |  | Total
Balance at December 31, 2021 |  |  |  |  |
Goodwill | $ | 392,302 |  |  | $ | 191,996 |  |  | $ | 584,298 |
Accumulated impairment losses | (167,406) |  |  | (116,000) |  |  | (283,406) |
| 224,896 |  |  | 75,996 |  |  | 300,892 |
Balance at December 31, 2022 |  |  |  |  |
Goodwill | $ | 392,302 |  |  | $ | 191,996 |  |  | $ | 584,298 |
Accumulated impairment losses | (167,406) |  |  | (116,000) |  |  | (283,406) |
| $ | 224,896 |  |  | $ | 75,996 |  |  | $ | 300,892 |

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