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Goodwill and Intangible Assets, Net (Tables) | 12 Months Ended
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Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | The changes in the carrying amount of goodwill for the years ended December 31, 2020, 2019 and 2018, were as follows:
(in thousands) |  | CAG |  | Water |  | LPD |  | Other |  | Consolidated Total
Balance as of December 31, 2017 |  | $ | 166,236 |  |  | $ | 11,951 |  |  | $ | 15,155 |  |  | $ | 6,531 |  |  | $ | 199,873 |
Business combinations |  | 20,282 |  |  | — |  |  | — |  |  | — |  |  | 20,282 |
Impact of changes in foreign currency exchange rates |  | (4,132) |  |  | (730) |  |  | (804) |  |  | — |  |  | (5,666) |
Balance as of December 31, 2018 |  | $ | 182,386 |  |  | $ | 11,221 |  |  | $ | 14,351 |  |  | $ | 6,531 |  |  | $ | 214,489 |
Business combinations |  | 24,826 |  |  | — |  |  | — |  |  | — |  |  | 24,826 |
Impact of changes in foreign currency exchange rates |  | 138 |  |  | 390 |  |  | (119) |  |  | — |  |  | 409 |
Balance as of December 31, 2019 |  | $ | 207,350 |  |  | $ | 11,611 |  |  | $ | 14,232 |  |  | $ | 6,531 |  |  | $ | 239,724 |
Business combinations |  | 220 |  |  | — |  |  | — |  |  | — |  |  | 220 |
Acquisition adjustment |  | (1,900) |  |  | — |  |  | — |  |  | — |  |  | (1,900) |
Impact of changes in foreign currency exchange rates |  | 4,724 |  |  | 412 |  |  | 167 |  |  | — |  |  | 5,303 |
Balance as of December 31, 2020 |  | $ | 210,394 |  |  | $ | 12,023 |  |  | $ | 14,399 |  |  | $ | 6,531 |  |  | $ | 243,347 |
Schedule of Estimated Useful Lives for Intangible Assets | We provide for amortization primarily using the straight-line method by charges to income in amounts that allocate the intangible assets over their estimated useful lives as follows:
Asset Classification |  | Estimated Useful Life
Customer-related intangible assets (1) |  | 3 to 17 years
Product rights (2) |  | 5 to 15 years
Noncompete agreements |  | 3 to 5 years
(1)Customer-related intangible assets are comprised of customer lists and customer relationships acquired from third parties. (2)Product rights comprise certain technologies, intellectual property, licenses, and trade names acquired from third parties.
Schedule of Intangible Assets Other Than Goodwill | Intangible assets other than goodwill consisted of the following:
(in thousands) |  | December 31, 2020 |  | December 31, 2019
|  | Cost |  | Accumulated Amortization |  | Net |  | Cost |  | Accumulated Amortization |  | Net
Customer-related intangible assets (1) |  | $ | 80,810 |  |  | $ | 32,838 |  |  | $ | 47,972 |  |  | $ | 99,301 |  |  | $ | 46,801 |  |  | $ | 52,500 |
Product rights (2) |  | 15,150 |  |  | 11,609 |  |  | 3,541 |  |  | 16,130 |  |  | 10,214 |  |  | 5,916 |
Noncompete agreements |  | 1,250 |  |  | 220 |  |  | 1,030 |  |  | 170 |  |  | 118 |  |  | 52 |
|  | $ | 97,210 |  |  | $ | 44,667 |  |  | $ | 52,543 |  |  | $ | 115,601 |  |  | $ | 57,133 |  |  | $ | 58,468 |
The above table excludes fully amortized intangible assets for the periods presented. (1)Customer-related intangible assets are comprised of customer lists and customer relationships acquired from third parties. (2)Product rights comprise certain technologies, intellectual property, licenses, and trade names acquired from third parties.
Schedule of Expected Amortization Expense | At December 31, 2020, the aggregate amortization expense associated with intangible assets is estimated to be as follows for each of the next five years and thereafter:
(in thousands) | Amortization Expense
2021 | $ | 8,648 |
2022 | 7,415 |
2023 | 5,647 |
2024 | 4,684 |
2025 | 4,210 |
Thereafter | 21,939 |
| $ | 52,543 |

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