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Summary of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Total gross value	$ 148,607	$ 138,451
Less accumulated depreciation	(93,277)	(89,199)
Total net value	55,330	49,252
Land
Property, Plant and Equipment [Line Items]
Total gross value	2,706	2,548
Buildings and improvements
Property, Plant and Equipment [Line Items]
Total gross value	18,080	17,555
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total gross value	111,859	109,064
Office furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Total gross value	6,203	5,655
Automotive equipment
Property, Plant and Equipment [Line Items]
Total gross value	1,775	1,116
Construction in progress
Property, Plant and Equipment [Line Items]
Total gross value	$ 7,984	$ 2,513

X

- 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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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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