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Restructuring and Other - Reserve Activities (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Restructuring Reserve [Roll Forward]    
Reserve balance at January 1 $ 2,452 $ 1,824
Restructuring charges 8,323 5,136
Other charges 5,259 2,424
Non-cash restructuring and other (975) (264)
Cash payments (13,088) (6,668)
Reserve balance at December 31 $ 1,971 $ 2,452