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Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment, net
Property, plant and equipment, gross	$ 294,335	$ 282,688
Accumulated depreciation and amortization	(207,757)	(190,007)
Property, plant and equipment, net	86,578	92,681
Depreciation expense	25,200	24,700	$ 24,200
Land
Property, Plant and Equipment, net
Property, plant and equipment, gross	2,762	2,724
Building and improvements
Property, Plant and Equipment, net
Property, plant and equipment, gross	$ 24,787	25,731
Building and improvements | Minimum
Property, Plant and Equipment, net
Useful Life	30 years
Building and improvements | Maximum
Property, Plant and Equipment, net
Useful Life	40 years
Office furniture and equipment
Property, Plant and Equipment, net
Property, plant and equipment, gross	$ 16,620	16,980
Office furniture and equipment | Minimum
Property, Plant and Equipment, net
Useful Life	5 years
Office furniture and equipment | Maximum
Property, Plant and Equipment, net
Useful Life	8 years
Machinery and equipment
Property, Plant and Equipment, net
Property, plant and equipment, gross	$ 250,166	$ 237,253
Machinery and equipment | Minimum
Property, Plant and Equipment, net
Useful Life	5 years
Machinery and equipment | Maximum
Property, Plant and Equipment, net
Useful Life	7 years

X

- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Amount of accumulated depreciation and amortization from plant, property, and equipment and right-of-use asset from finance lease.

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Amount, after accumulated depreciation and amortization, of property, plant, and equipment and finance lease right-of-use asset.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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