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Summary of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 145,303	$ 139,591
Less accumulated depreciation	(97,543)	(91,619)
Total Property, plant and equipment	47,760	47,972
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	2,458	2,458
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	15,067	14,726
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	117,140	113,506
Office furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	4,857	4,997
Automotive equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	383	491
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 5,398	$ 3,413

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

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-Section S99
-Paragraph 1
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- Definition

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.

+ References

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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