Other Financial Statement Information - Property, Plant and Equipment - Net (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property and equipment - Gross	$ 249,490	$ 224,939
Less accumulated depreciation	142,163	132,974
Property and equipment - Net	107,327	91,965
Land and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment - Gross	12,903	12,260
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment - Gross	73,739	71,711
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment - Gross	158,980	137,599
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment - Gross	$ 3,868	$ 3,369