Accrued Liabilities - Components of Accrued Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Payables and Accruals [Abstract]
Payroll and employee benefits, excluding postemployment benefits	$ 59,593	$ 67,274
Product liability	44,700	58,054
Other postretirement benefits	14,838	15,048
Advertising	17,476	14,281
Taxes other than income taxes	9,770	11,414
Warranty	8,304	5,699
Other	25,795	12,034
Accrued liabilities	$ 180,476	$ 183,804