Property and Equipment, Net (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 261,885	$ 253,468
Less accumulated depreciation	154,840	143,216
Total	107,045	110,252
Depreciation expense	13,500	13,200	$ 13,300
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	15,662	15,662
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 57,642	57,024
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Useful life	5 years
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Useful life	40 years
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 160,163	146,175
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful life	2 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful life	20 years
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 19,676	21,127
Furniture and equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful life	2 years
Furniture and equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful life	10 years
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 8,742	$ 13,480