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Goodwill and Intangible Assets, Net (Tables) | 12 Months Ended
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Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of goodwill | The following table summarizes the changes in the carrying amount of goodwill, by reportable segment, for the periods presented (in thousands):
| EHS |  | Clinical Solutions |  | Consolidated
Balance as of December 31, 2019 (1) | $ | 431,684 |  |  | $ | 134,675 |  |  | $ | 566,359 |
Goodwill disposal (2) | (2,200) |  |  | — |  |  | (2,200) |
Impairment | (215,100) |  |  | — |  |  | (215,100) |
Foreign currency translation | (30) |  |  | — |  |  | (30) |
Balance as of December 31, 2020(1) | 214,354 |  |  | 134,675 |  |  | 349,029 |
Goodwill acquired | — |  |  | 77,288 |  |  | 77,288 |
Foreign currency translation | (20) |  |  | — |  |  | (20) |
Balance as of December 31, 2021 | $ | 214,334 |  |  | $ | 211,963 |  |  | $ | 426,297 |
———————— (1)Net of cumulative inception to date impairment of $575.5 million and $360.4 million as of December 31, 2020 and 2019, respectively. (2)Goodwill written-off upon disposal of a consolidated subsidiary.
Schedule of intangible assets details | The following summarizes the estimated useful lives by asset classification:
Corporate trade name | 10 - 20 years
Customer relationships | 10 - 25 years
Technology | 5 years
Provider network contracts | 3 - 5 years
Details of our intangible assets (in thousands, except weighted-average useful lives) as of December 31, 2021 and December 31, 2020 are presented below:
| December 31, 2021 |  | December 31, 2020
| Weighted- Average Remaining Useful Life |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Value |  | Weighted- Average Remaining Useful Life |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Value
Corporate trade name | 12.4 |  | $ | 25,800 |  |  | $ | 7,693 |  |  | $ | 18,107 |  |  | 13.2 |  | $ | 23,300 |  |  | $ | 6,271 |  |  | $ | 17,029 |
Customer relationships (1) | 14.9 |  | 311,019 |  |  | 72,697 |  |  | 238,322 |  |  | 16.2 |  | 278,519 |  |  | 57,716 |  |  | 220,803 |
Technology | 2.0 |  | 87,922 |  |  | 73,378 |  |  | 14,544 |  |  | 1.8 |  | 82,922 |  |  | 63,507 |  |  | 19,415 |
Below market lease, net | 1.3 |  | 1,218 |  |  | 950 |  |  | 268 |  |  | 2.3 |  | 1,118 |  |  | 648 |  |  | 470 |
Provider network contracts (1) | 2.2 |  | 16,417 |  |  | 7,874 |  |  | 8,543 |  |  | 2.9 |  | 12,175 |  |  | 4,900 |  |  | 7,275 |
Total intangible assets, net |  |  | $ | 442,376 |  |  | $ | 162,592 |  |  | $ | 279,784 |  |  |  |  | $ | 398,034 |  |  | $ | 133,042 |  |  | $ | 264,992 |
———————— (1)Amounts exclude $2.2 million and $0.9 million of customer relationships and provider network contracts, respectively, net of accumulated amortization, with weighted average remaining useful lives of 15 years and 10 months reclassified to discontinued operations as of December 31, 2020.
Schedule of future estimated amortization of intangible assets | Future estimated amortization of intangible assets (in thousands) as of December 31, 2021, is as follows:
2022 | $ | 29,102 |
2023 | 26,798 |
2024 | 20,913 |
2025 | 19,403 |
2026 | 19,153 |
Thereafter | 164,415 |
Total future amortization of intangible assets | $ | 279,784 |

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