Restructuring - Additional Information (Detail) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($) Plant Facility Office
Reorganizations [Abstract]
Restructuring charges \| $	$ 1,364	$ 10	$ 3,374	$ 2,596
Number of manufacturing plants \| Plant				2
Number of facilities consolidated \| Facility				1
Number of sales offices \| Office				2

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration