Contingent Liabilities - Additional Information (Detail) Tire in Millions	6 Months Ended
	Jun. 30, 2019 USD ($) Tire	Dec. 31, 2018 USD ($)
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	33,000,000
Product liability reserve balance	114,636,000	$ 112,124,000
Increase in product liability reserve due to self insured incidents	18,593,000
Settlements and changes in amount of reserves estimated liability increase (decrease)	(956,000)
Company paid to resolve cases and claims	15,125,000
Current portion product liability reserve balance	$ 30,690,000	$ 30,550,000