Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Book expenses capitalized for tax	$ 5,476	$ 6,336
Post-retirement benefits	17,838	23,335
Inventory reserves	2,487	3,147
Vacation allowances	816	932
Net operating losses and tax credit carryforwards	7,394	7,479
Post employment benefits	3,488	2,382
Foreign tax credit carryforwards	8,266	11,231
Stock options	10,587	10,157
Product Liability	6,253	3,918
Basis of capital assets	912	1,009
Warranties	3,666	3,210
Reserve for doubtful accounts	2,320	1,948
Accrued payroll	4,172	4,319
Other	7,782	5,801
Total deferred tax assets	81,457	85,204
Valuation allowances	(5,153)	(3,763)
Net deferred tax assets	76,304	81,441
Property, plant and equipment	(10,938)	(9,269)
Pension	(18,947)	(22,195)
Intangibles	(43,789)	(30,180)
Other	(1,047)	(2,053)
Total deferred tax liabilities	(74,721)	(63,697)
Net deferred taxes	$ 1,583	$ 17,744