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Goodwill and Intangible Assets (Tables) | 3 Months Ended
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Mar. 31, 2021
Goodwill And Intangible Assets Disclosure [Abstract] |
Schedule of Amounts Related to Goodwill | Amounts related to goodwill are as follows:
|  | Assessment, Permitting and Response |  |  | Measurement and Analysis |  |  | Remediation and Reuse |  |  | Total |
Balance as of December 31, 2020 |  | $ | 162,156 |  |  | $ | 69,054 |  |  | $ | 43,457 |  |  | $ | 274,667 |
Goodwill acquired during the period |  |  | — |  |  |  | — |  |  |  | 7,532 |  |  |  | 7,532 |
Balance as of March 31, 2021 |  | $ | 162,156 |  |  | $ | 69,054 |  |  | $ | 50,989 |  |  | $ | 282,199 |
Schedule of Amounts Related to Finite-Lived Intangible Assets | Amounts related to finite-lived intangible assets are as follows:
March 31, 2021 |  | Estimated Useful Life |  | Gross Balance |  |  | Accumulated Amortization |  |  | Total Intangible Assets—Net |
Finite lived intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships |  | 2–15 years |  | $ | 173,502 |  |  | $ | 58,294 |  |  | $ | 115,208 |
Covenants not to compete |  | 4–5 years |  |  | 30,864 |  |  |  | 22,471 |  |  |  | 8,393 |
Trade names |  | 1–5 years |  |  | 17,459 |  |  |  | 13,445 |  |  |  | 4,014 |
Proprietary software |  | 3–5 years |  |  | 21,260 |  |  |  | 7,368 |  |  |  | 13,892 |
Patent |  | 16 years |  |  | 17,479 |  |  |  | 1,671 |  |  |  | 15,808 |
Total other intangible assets —net |  |  |  | $ | 260,564 |  |  | $ | 103,249 |  |  | $ | 157,315 |
December 31, 2020 |  | Estimated Useful Life |  | Gross Balance |  |  | Accumulated Amortization |  |  | Total Intangible Assets—Net |
Finite lived intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customer relationships |  | 7–15 years |  | $ | 164,782 |  |  | $ | 53,446 |  |  | $ | 111,336 |
Covenants not to compete |  | 4–5 years |  |  | 29,942 |  |  |  | 21,469 |  |  |  | 8,473 |
Trade names |  | 1–5 years |  |  | 16,938 |  |  |  | 12,849 |  |  |  | 4,089 |
Proprietary software |  | 3–5 years |  |  | 21,007 |  |  |  | 6,132 |  |  |  | 14,875 |
Patent |  | 16 years |  |  | 17,479 |  |  |  | 1,398 |  |  |  | 16,081 |
Total other intangible assets —net |  |  |  | $ | 250,148 |  |  | $ | 95,294 |  |  | $ | 154,854 |
Schedule of Future Amortization Expense | Future amortization expense is estimated to be as follows for each of the five following years and thereafter:
December 31, |  |  |  |
2021 (remaining) |  | $ | 22,667 |
2022 |  |  | 26,545 |
2023 |  |  | 21,276 |
2024 |  |  | 18,096 |
2025 |  |  | 11,854 |
2026 and thereafter |  |  | 56,877 |
Total |  | $ | 157,315 |

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