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Restructuring and Other - Reserve Activities (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Restructuring Reserve [Roll Forward]    
Beginning reserve balance $ 2,452 $ 1,824
Restructuring charges 4,596 3,502
Other charges 3,082 1,087
Non-cash restructuring and other (413) (117)
Payments (6,703) (2,926)
Ending reserve balance $ 3,014 $ 3,370