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Goodwill and Other Intangibles - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Jan. 15, 2020
Goodwill $ 444,362 $ 444,362 $ 356,128   $ 72,000
Intangible assets, gross foreign currency translation adjustments   (58,000)      
Intangible assets, accumulated amortization foreign currency translation adjustments   (42,000)      
Amortization expense   57,000 $ 51,000 $ 50,000  
Future amortization expense, year 2 57,000 57,000      
Medimass [Member]          
Intangible assets, gross foreign currency translation adjustments   15,000      
Intangible assets, accumulated amortization foreign currency translation adjustments   5,000      
Impairment of certain intangible assets $ 10,000 10,000      
Andrew Alliance [Member]          
Goodwill acquired   72,000      
Integrated Softwate Solutions Limited [Member]          
Goodwill acquired   5,000      
Integrated Sofware Solutions Limited And Andrew Alliance [Member]          
Goodwill acquired   $ 11,000