Contingent Liabilities - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013 Tire	Mar. 31, 2012	Dec. 31, 2012
Commitments And Contingencies Disclosure [Abstract]
Minimum estimated sale of passenger, light truck, SUV, radial medium truck and motorcycle tires per year in North America	30,000,000
Maximum estimated sale of passenger, light truck, SUV, radial medium truck and motorcycle tires per year in North America	35,000,000
Estimated number of Company produced tires of different specifications	300,000,000
Minimum costs of resolved cases	$ 0
Maximum costs of resolved cases	33,000,000
Increased its products liability reserve	14,382,000
Increase in products liability reserve due to self insured incidents	12,609,000
Increase in products liability reserve due to revised estimates of future settlements for unasserted and premature claims	2,328,000
Increase decrease in products liability reserve due to changes in estimated amounts on existing reserves	555,000
Period for resolution of few cases	5 years
Company paid to resolve cases and claims	9,117,000
Products liability reserve balance	211,614,000		206,349,000
Current portion products liability reserve balance	70,753,000		70,267,000
Products liability expenses	$ 20,697,000	$ 26,997,000