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Goodwill and Intangible Assets, Net (Tables) | 12 Months Ended
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Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
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
﻿ |  |
Product rights(1) |  | 5 to 15 years
Customer-related intangible assets(2) |  | 3 to 17 years
Noncompete agreements |  | 3 to 5 years
(1) | Product rights comprise certain technologies, intellectual property, licenses, and trade names acquired from third parties.
(2) | Customer-related intangible assets are comprised of customer lists and customer relationships acquired from third parties.
Schedule of Intangible Assets Other Than Goodwill | Intangible assets other than goodwill consisted of the following (in thousands):
﻿ |  | December 31, 2018 |  | December 31, 2017
﻿ |  | Cost |  | Accumulated Amortization |  | Net |  | Cost |  | Accumulated Amortization |  | Net
Product rights(1) |  | 27,060 |  |  | 19,153 |  |  | 7,907 |  |  | 32,558 |  |  | 25,251 |  |  | 7,307 |
Customer-related intangible assets(2) |  | 77,015 |  |  | 43,352 |  |  | 33,663 |  |  | 80,398 |  |  | 44,382 |  |  | 36,016 |
Noncompete agreements |  | 856 |  |  | 601 |  |  | 255 |  |  | 1,271 |  |  | 748 |  |  | 523 |
﻿ |  | $ | 104,931 |  |  | $ | 63,106 |  |  | $ | 41,825 |  |  | $ | 114,227 |  |  | $ | 70,381 |  |  | $ | 43,846 |
The above table excludes fully amortized intangible assets for the periods presented.
(1) | Product rights comprise certain technologies, licenses and trade names acquired from third parties.
(2) | Customer-related intangible assets are comprised of customer lists and customer relationships acquired from third parties.
Schedule of Expected Amortization Expense | At December 31, 2018, 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
﻿ |  |
2019 | $ | 8,450 |
2020 | 7,087 |
2021 | 6,232 |
2022 | 5,063 |
2023 | 3,330 |
Thereafter | 11,663 |
﻿ | $ | 41,825 |
Schedule of Goodwill | The changes in the carrying amount of goodwill for the years ended December 31, 2018, 2017 and 2016, were as follows (in thousands):
﻿ |  | CAG |  | Water |  | LPD |  | Other |  | Consolidated Total
Balance as of December 31, 2015 |  | $ | 145,191 |  |  | $ | 13,038 |  |  | $ | 14,174 |  |  | $ | 6,531 |  |  | $ | 178,934 |
Business combinations |  | 1,720 |  |  | — |  |  | — |  |  | — |  |  | 1,720 |
Impact of changes in foreign currency exchange rates |  | (717 | ) |  | (2,148 | ) |  | 439 |  |  | — |  |  | (2,426 | )
Balance as of December 31, 2016 |  | $ | 146,194 |  |  | $ | 10,890 |  |  | $ | 14,613 |  |  | $ | 6,531 |  |  | $ | 178,228 |
Business combinations |  | 13,541 |  |  | — |  |  | — |  |  | — |  |  | 13,541 |
Impact of changes in foreign currency exchange rates |  | 6,501 |  |  | 1,061 |  |  | 542 |  |  | — |  |  | 8,104 |
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 |

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