Other Balance Sheet Captions - Components of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Components of Property and Equipment [Abstract]
Land, buildings, and improvements	$ 90,992	$ 72,223
Transportation equipment	3,308	3,286
Machinery and equipment	184,779	175,371
Construction in progress	16,814	16,408
Property, plant, and equipment, at cost	295,893	267,288
Less accumulated depreciation and amortization	(175,105)	(164,237)
Property, plant, and equipment, net	$ 120,788	$ 103,051

-- None. No documentation exists for this element. --

No definition available.

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- Definition

-- None. No documentation exists for this element. --

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- Definition

-- None. No documentation exists for this element. --

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No definition available.

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- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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- Definition

Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

+ References

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- Definition

Amount before accumulated depreciation of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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