Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 498,113	$ 472,695
Less: accumulated depreciation	(211,730)	(200,502)
Total property, plant and equipment, net	286,383	272,193
Land
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Gross	7,875	6,078
Buildings and Improvements [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 123,342	92,326
Buildings and Improvements [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life	10 years
Buildings and Improvements [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life	40 years
Machinery and Equipment
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 360,570	364,101
Machinery and Equipment | Minimum [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life	2 years
Machinery and Equipment | Maximum [Member]
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life	25 years
Construction in Progress
Property Plant And Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 6,326	$ 10,190