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Reportable Segments and Geographic Areas Information - Information about Company's Operations in Different Geographic Areas (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Long-lived assets from continuing operations (excluding intangible assets): |  |
Long-lived assets from continuing operations (excluding intangible assets) | $ 526,530 | $ 548,908
United States |  |
Long-lived assets from continuing operations (excluding intangible assets): |  |
Long-lived assets from continuing operations (excluding intangible assets) | 344,535 | 370,144
United Kingdom |  |
Long-lived assets from continuing operations (excluding intangible assets): |  |
Long-lived assets from continuing operations (excluding intangible assets) | 55,519 | 57,675
European Union countries |  |
Long-lived assets from continuing operations (excluding intangible assets): |  |
Long-lived assets from continuing operations (excluding intangible assets) | 82,256 | 78,500
Asia |  |
Long-lived assets from continuing operations (excluding intangible assets): |  |
Long-lived assets from continuing operations (excluding intangible assets) | 14,066 | 12,869
Other foreign countries |  |
Long-lived assets from continuing operations (excluding intangible assets): |  |
Long-lived assets from continuing operations (excluding intangible assets) | 30,154 | 29,720
Total international |  |
Long-lived assets from continuing operations (excluding intangible assets): |  |
Long-lived assets from continuing operations (excluding intangible assets) | $ 181,995 | $ 178,764

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