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Restructuring - Schedule of Company's Restructuring Activity (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Restructuring and Related Activities [Abstract]    
Beginning of period $ 2,632 $ 3,244
Charged to expense 223 1,220
Payments and adjustments (252) (1,806)
End of period $ 2,603 $ 2,658