Exit and Realignment Costs - Accrual for Exit and Realignment Costs (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Severance
Restructuring Reserve [Roll Forward]
Accrued exit and realignment charges, beginning balance	$ 7,477	$ 10,668
Restructuring charges	6,008	7,988
Change in estimate	(127)	(108)
Cash payments	(13,712)	(17,256)
Accrued exit and realignment charges, ending balance	8,162	7,477
Information system restructuring costs
Restructuring Reserve [Roll Forward]
Restructuring charges	2,531	2,802
Other
Restructuring Reserve [Roll Forward]
Restructuring charges	$ 5,985	$ 3,383