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Restructuring Costs (Tables) | 12 Months Ended
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Dec. 31, 2020
Restructuring And Related Activities [Abstract] |
Restructuring and Related Costs | The following table shows the costs incurred by type of restructuring activity:
Year ended December 31 |  | 2020 |  |  | 2019 |  |  | 2018 |
|  | (In thousands) |
Severance benefits |  | $ | 9,350 |  |  | $ | — |  |  | $ | — |
Asset impairments and lease termination costs |  |  | 2,538 |  |  |  | — |  |  |  | — |
Gain on fair value remeasurement of cost and equity method investments |  |  | (1,099 | ) |  |  | — |  |  |  | — |
Liquidation dividend from a cost method investment |  |  | (1,247 | ) |  |  | — |  |  |  | — |
Gain on sale of internet protocol addresses |  |  | (1,409 | ) |  |  | — |  |  |  | — |
Total restructuring and other costs, net |  | $ | 8,133 |  |  | $ | — |  |  | $ | — |

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- Definition Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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