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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
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