Contingent Liabilities - Additional Information (Detail) Tire in Millions	3 Months Ended
	Mar. 31, 2018 USD ($) Tire	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Minimum estimated sale of passenger car, light truck, SUV, radial medium truck and motorcycle tires per year in North America | Tire	30
Maximum estimated sale of passenger car, 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	130,862,000		$ 129,892,000
Increase in product liability reserve due to self insured incidents	11,003,000
Increase (decrease) in product liability reserve due to changes in estimated amounts on existing reserves	267,000
Company paid to resolve cases and claims	10,300,000
Current portion product liability reserve balance	44,960,000		$ 44,700,000
Product liability expenses	$ 15,068,000	$ 16,268,000