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Business Combinations - Summary of Final Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Assets acquired      
Goodwill $ 27,840 $ 15,621 $ 16,544
SubCon and MICOS Telcom [Member]      
Assets acquired      
Current assets, net of cash 5,976    
Property, plant and equipment 1,189    
Goodwill 12,132    
Finite-lived intangible assets 8,092    
Other long-term assets 1,883    
Total assets acquired 29,272    
Liabilities assumed (10,378)    
Net assets acquired $ 18,894