Contingent Liabilities - Additional Information (Detail) $ in Thousands, Tire in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($) Tire	Dec. 31, 2019 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Minimum estimated sale of passenger, light truck, SUV, radial medium truck and motorcycle tires per year in North America | Tire		30
Maximum estimated sale of passenger, light truck, SUV, radial medium truck and motorcycle tires per year in North America | Tire		35
Estimated number of Company produced tires of different specifications | Tire		300
Product liability expenses, minimum		$ 0
Product liability expenses, maximum		33,000
Loss contingency accrual, period decrease	$ 48,764
Product liability reserve balance		95,339	$ 117,219
Increase in product liability reserve due to self insured incidents		34,809
Settlements and changes in amount of reserves estimated liability increase (decrease)		(49,032)
Company paid to resolve cases and claims		7,657
Current portion product liability reserve balance		$ 18,337	$ 25,366
Percentage of workforce subject to Collective bargaining units		42.00%