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Other Financial Statement Information - Property, Plant and Equipment - Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property and equipment - Gross	$ 261,205	$ 247,201
Less accumulated depreciation	(152,607)	(142,097)
Property and equipment - Net	108,598	105,104
Land and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment - Gross	13,141	12,584
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment - Gross	75,941	72,662
Machinery, Equipment and Aircraft [Member]
Property, Plant and Equipment [Line Items]
Property and equipment - Gross	166,999	158,078
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment - Gross	$ 5,124	$ 3,877

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
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-Publisher FASB
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-Section S99
-Paragraph 1
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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.

+ References

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+ References

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-Topic 210
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-Section S99
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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