Business Segments - Information on Operating Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Net sales	$ 737,671	$ 733,843	$ 2,037,575	$ 2,097,621
Operating profit (loss):	81,201	110,780	140,419	252,976
Interest expense	(7,930)	(7,591)	(24,038)	(23,629)
Interest income	2,399	1,776	6,702	5,333
Other pension and postretirement benefit expense	(6,932)	(9,403)	(20,885)	(28,097)
Other non-operating income (expense)	2,922	(978)	(129)	(1,468)
Income before income taxes	71,660	94,584	102,069	205,115
Americas Tire
Segment Reporting Information [Line Items]
Net sales	619,763	615,261	1,672,396	1,742,863
Operating profit (loss):	87,353	125,056	159,068	286,725
International Tire
Segment Reporting Information [Line Items]
Net sales	117,908	118,582	365,179	354,758
Operating profit (loss):	5,994	2,042	19,080	7,757
Eliminations - Intercompany
Segment Reporting Information [Line Items]
Net sales	(53,434)	(54,925)	(152,416)	(131,197)
Operating profit (loss):	372	(887)	459	(1,413)
Eliminations - Intercompany | Americas Tire
Segment Reporting Information [Line Items]
Net sales	8,941	10,162	26,111	29,275
Eliminations - Intercompany | International Tire
Segment Reporting Information [Line Items]
Net sales	44,493	44,763	126,305	101,922
Operating Segments | Americas Tire
Segment Reporting Information [Line Items]
Net sales	628,704	625,423	1,698,507	1,772,138
Operating Segments | International Tire
Segment Reporting Information [Line Items]
Net sales	162,401	163,345	491,484	456,680
Unallocated corporate charges
Segment Reporting Information [Line Items]
Operating profit (loss):	$ (12,518)	$ (15,431)	$ (38,188)	$ (40,093)