Significant Accounting Policies - Additional Information (Detail) - USD ($)				3 Months Ended	12 Months Ended
	May 10, 2019	Feb. 15, 2019	Sep. 24, 2018	Jun. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 22, 2017
Summary Of Significant Policies [Line Items]
Minimum percentage of investment consolidated					50.00%
Maximum percentage of cost method investments					20.00%
Cash and cash equivalents					$ 391,332,000	$ 356,254,000	$ 371,684,000
Unremitted foreign earnings					727,000,000			$ 495,000,000
Product liability expenses, minimum					0
Product liability expenses, maximum					33,000,000
Advertising expense					58,453,000	54,177,000	52,798,000
Research and development expense				$ 59,869,000	69,928,000	64,007,000
Payment made by company's joint venture to related party for services				40,279,000	26,589,000	28,023,000
Sale to noncontrolling shareholder				$ 8,209,000	4,373,000	4,713,000
Purchases from related party					10,920,000	775,000
Unfavorable Regulatory Action
Summary Of Significant Policies [Line Items]
Loss contingency imposed		42.16%
Incurred expense on loss contingency					33,507,000
Section 301 Tariffs
Summary Of Significant Policies [Line Items]
Loss contingency imposed	25.00%		10.00%
Incurred expense on loss contingency					19,053,000	6,431,000
Section 301 Tariffs | Cost of Sales
Summary Of Significant Policies [Line Items]
Recovery of loss contingency duties					20,091,000
Section 301 Tariffs Prior Year | Cost of Sales
Summary Of Significant Policies [Line Items]
Recovery of loss contingency duties					$ 11,346,000
Loss from Catastrophes | Cost of Sales
Summary Of Significant Policies [Line Items]
Incurred expense on loss contingency						1,569,000	12,583,000
Recovered insurance proceeds						$ 7,300,000	$ 7,000,000
Computer Software, Intangible Asset | Minimum
Summary Of Significant Policies [Line Items]
Intangible asset useful life					1 year
Computer Software, Intangible Asset | Maximum
Summary Of Significant Policies [Line Items]
Intangible asset useful life					10 years
Land Use Rights | Minimum
Summary Of Significant Policies [Line Items]
Intangible asset useful life					36 years
Land Use Rights | Maximum
Summary Of Significant Policies [Line Items]
Intangible asset useful life					43 years