Divestitures - Additional Information (Detail) - USD ($) $ in Thousands				3 Months Ended
	Nov. 27, 2018	Mar. 30, 2018	Feb. 28, 2018	Mar. 31, 2019	Mar. 31, 2018
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Estimated gain (loss) on disposal				$ (70)	$ 11,177
Gain (loss) on disposal				(70)	11,177
Net sales				$ 86,011	74,139
Strobic Air Corporation [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Sale price, subject to post-closing purchase price adjustments		$ 28,500
Estimated gain (loss) on disposal					6,900
Net proceeds after adjustments		27,900
Net assets disposed		18,800
Transaction-related cost		2,200
Goodwill		13,000
Net sales					4,200
Income from operations					1,100
Gain (loss) on disposal					6,900
Strobic Air Corporation [Member] | Definite-Lived Intangible Assets [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Intangible assets		2,300
Strobic Air Corporation [Member] | Indefinite-Lived Intangible Assets [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Intangible assets		$ 1,200
Keystone Filter [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Sale price, subject to post-closing purchase price adjustments			$ 7,500
Estimated gain (loss) on disposal					4,300
Net proceeds after adjustments			7,200
Net assets disposed			2,700
Transaction-related cost			$ 200
Gain (loss) on disposal					4,300
Zhongli [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Estimated gain (loss) on disposal	$ (15,100)
Gain (loss) on disposal	(15,100)
Disposal group, consideration receivable	$ 3,600
Net sales					$ 1,700