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Goodwill and Other Intangible Assets | 12 Months Ended
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Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Other Intangible Assets | Goodwill and Other Intangible Assets The changes in the net carrying amount of goodwill for the years ended December 31, are as follows:
| 2020 |  | 2019
Balance as of January 1, | $ | 618,042 |  |  | $ | 400,440 |
Goodwill resulting from business combinations | — |  |  | 217,482 |
Goodwill adjustment resulting from business combinations | (1,009) |  |  | — |
Foreign currency translation | 1,407 |  |  | 120 |
Balance as of December 31, | $ | 618,440 |  |  | $ | 618,042 |
During 2019, the Company acquired Buffalo Filter as further described in Note 2. Goodwill resulting from the acquisition amounted to $215.8 million and acquired intangible assets including customer and distributor relationships, developed technology and trademarks and tradenames amounted to $140.0 million. Total accumulated goodwill impairment losses aggregated $107.0 million at December 31, 2020 and 2019, respectively. During 2019, the Company acquired a distributor as further described in Note 2 resulting in identifiable intangible assets of $4.1 million and goodwill. During 2020, the Company recorded a measurement period adjustment related to the acquired distributor. Other intangible assets consist of the following:
| December 31, 2020 |  | December 31, 2019
| Weighted Average Amortization Period (Years) | Gross Carrying Amount |  | Accumulated Amortization |  | Gross Carrying Amount |  | Accumulated Amortization
Intangible assets with definite lives: |  |  |  |  |  |  |  |
Customer and distributor relationships | 24 | $ | 342,639 |  |  | $ | (134,555) |  |  | $ | 342,568 |  |  | $ | (115,311) |
Sales representation, marketing and promotional rights | 25 | 149,376 |  |  | (54,000) |  |  | 149,376 |  |  | (48,000) |
Patents and other intangible assets | 15 | 73,516 |  |  | (48,882) |  |  | 70,646 |  |  | (46,456) |
Developed technology | 16 | 106,604 |  |  | (19,705) |  |  | 106,604 |  |  | (13,171) |
Intangible assets with indefinite lives: |  |  |  |  |  |  |  |
Trademarks and tradenames |  | 86,544 |  |  | — |  |  | 86,544 |  |  | — |
| 22 | $ | 758,679 |  |  | $ | (257,142) |  |  | $ | 755,738 |  |  | $ | (222,938) |
Amortization expense related to intangible assets which are subject to amortization totaled $34.2 million, $32.3 million and $23.2 million for the years ending December 31, 2020, 2019 and 2018, respectively, and is included as a reduction of revenue (for amortization related to our sales representation, marketing and promotional rights) and in selling and administrative expense (for all other intangible assets) in the consolidated statements of comprehensive income. Included in developed technology is $1.6 million, $6.5 million and $21.3 million of earn-out consideration that was paid during 2020, 2019 and 2018, respectively, and an additional accrual of $6.0 million that is considered probable as of December 31, 2020 associated with a prior asset acquisition. The accrual is recorded in other current and other long-term liabilities at December 31, 2020. The estimated amortization expense related to intangible assets at December 31, 2020 and for each of the five succeeding years is as follows:
| Amortization included in expense |  | Amortization recorded as a reduction of revenue |  | Total
2021 | $ | 27,535 |  |  | $ | 6,000 |  |  | $ | 33,535 |
2022 | 26,377 |  |  | 6,000 |  |  | 32,377 |
2023 | 25,609 |  |  | 6,000 |  |  | 31,609 |
2024 | 24,794 |  |  | 6,000 |  |  | 30,794 |
2025 | 25,046 |  |  | 6,000 |  |  | 31,046 |

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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