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Segment, Geographic and Product Information - Information Regarding Long-Lived Assets in Geographic Areas (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Long-lived assets:    
Total long-lived assets $ 1,655,848 $ 1,564,916
U.K. [Member]    
Long-lived assets:    
Total long-lived assets 655,906 595,571
U.S. [Member]    
Long-lived assets:    
Total long-lived assets 767,082 766,315
Asia [Member]    
Long-lived assets:    
Total long-lived assets 119,619 122,564
France [Member]    
Long-lived assets:    
Total long-lived assets 28,518 21,877
Other Americas [Member]    
Long-lived assets:    
Total long-lived assets 18,236 19,595
Other Europe/MEA [Member]    
Long-lived assets:    
Total long-lived assets $ 66,487 $ 38,994