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Goodwill (Tables) | 12 Months Ended
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Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Changes in the Carrying Value of Goodwill | The changes in the carrying value of goodwill were as follows (in thousands):
|  | Amount
Balance as of December 31, 2018 |  | $ | 113,208 |
Acquisition of Sualab Co., Ltd. |  | 130,142 |
Foreign exchange rate changes |  | 95 |
Balance as of December 31, 2019 |  | 243,445 |
Sualab Co., Ltd. purchase price adjustment |  | (1,004) |
Foreign exchange rate changes |  | 1,637 |
Balance as of December 31, 2020 |  | $ | 244,078 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13854-109267 + Details
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