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Goodwill (Detail) - USD ($)
$ in Thousands
Jul. 01, 2019
Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]    
Goodwill $ 938,445 $ 938,445
Accumulated impairment losses (171,400) (171,400)
Goodwill, net $ 767,045 $ 767,045