Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Product liability	$ 33,689	$ 29,405
Capitalized research and development	22,915	17,886
Employee benefits	10,539	12,009
Net operating losses and tax credit carryforwards	6,310	6,026
Share-based compensation	3,588	5,396
Accrued expenses and other reserves	5,195	4,384
Other	5,287	3,828
Total deferred tax assets	87,523	78,934
Valuation allowances	(7,188)	(5,937)
Net deferred tax assets	80,335	72,997
Goodwill and intangibles	(39,040)	(35,999)
Property, plant and equipment	(14,649)	(11,714)
Other	(1,897)	(2,475)
Total deferred tax liabilities	55,586	50,188
Net deferred tax assets	$ 24,749	$ 22,809