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Goodwill and Intangible Assets | 3 Months Ended
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Mar. 31, 2020
Goodwill and Intangible Assets |
Goodwill and Intangible Assets | 9. Goodwill and Intangible Assets ​ The following table sets forth the changes in the carrying amount of goodwill for the three months ended March 31, 2020 (dollars in millions): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | BSI Life | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Science | ​ | BSI NANO | ​ | BEST | ​ | Total
Balance at December 31, 2019 |  | $ | 84.2 | ​ | $ | 208.5 | ​ | $ | 0.3 | ​ | $ | 293.0
Foreign currency impact | ​ | ​ | (0.3) | ​ | ​ | (2.7) | ​ | ​ | — | ​ | ​ | (3.0)
Balance at March 31, 2020 | ​ | $ | 83.9 | ​ | $ | 205.8 | ​ | $ | 0.3 | ​ | $ | 290.0
​ The following is a summary of intangible assets, excluding goodwill (dollars in millions): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, 2020 | ​ | December 31, 2019
​ | ​ | Gross | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Gross | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Carrying | ​ | Accumulated | ​ | Net Carrying | ​ | Carrying | ​ | Accumulated | ​ | Net Carrying
​ |  | Amount |  | Amortization |  | Amount |  | Amount |  | Amortization |  | Amount
Existing technology and related patents | ​ | $ | 298.4 | ​ | $ | (186.7) | ​ | $ | 111.7 | ​ | $ | 300.9 | ​ | $ | (182.4) | ​ | $ | 118.5
Customer relationships | ​ |  | 132.9 | ​ |  | (33.8) | ​ |  | 99.1 | ​ |  | 134.7 | ​ |  | (30.9) | ​ |  | 103.8
Non compete contracts | ​ |  | 1.8 | ​ |  | (1.8) | ​ |  | — | ​ | ​ | 1.8 | ​ | ​ | (1.8) | ​ | ​ | —
Trade names | ​ |  | 13.5 | ​ |  | (3.2) | ​ |  | 10.3 | ​ |  | 13.7 | ​ |  | (2.9) | ​ |  | 10.8
Other | ​ | ​ | 5.5 | ​ | ​ | (5.4) | ​ | ​ | 0.1 | ​ | ​ | 5.5 | ​ | ​ | (5.4) | ​ | ​ | 0.1
Intangible assets | ​ | $ | 452.1 | ​ | $ | (230.9) | ​ | $ | 221.2 | ​ | $ | 456.6 | ​ | $ | (223.4) | ​ | $ | 233.2
​ For the three months ended March 31, 2020 and 2019, the Company recorded amortization expense of $8.7 million and $10.1 million, respectively, related to intangible assets subject to amortization. ​ During the three months ended March 31, 2020, as a result of the impact of the COVID-19 pandemic, the Company performed an interim impairment assessment of the goodwill balance as of March 31, 2020 using a combination of both quantitative and qualitative approaches. Based on this interim assessment, the Company concluded the fair values of each of the reporting units were significantly greater than their carrying amounts, and therefore, no impairment is required. The goodwill assessments were based on management's estimates and assumptions, a number of which are dependent on external factors. To the extent actual results differ materially from these estimates and the Company experiences further negative developments in subsequent periods, interim impairment assessments could be required, which could result in an impairment of goodwill.

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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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