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Goodwill and Other Intangibles - Finite and Indefinite-Lived Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-lived intangible assets
Gross Carrying Amount	$ 22,741	$ 22,520
Accumulated Amortization	(12,266)	(11,232)
Indefinite-lived intangible assets Goodwill	15,769	15,821	$ 17,792
Patents [Member]
Finite-lived intangible assets
Gross Carrying Amount	4,816	4,815
Accumulated Amortization	(4,799)	(4,799)
Land Use Rights [Member]
Finite-lived intangible assets
Gross Carrying Amount	1,070	1,155
Accumulated Amortization	(180)	(173)
Trademark [Member]
Finite-lived intangible assets
Gross Carrying Amount	1,725	1,713
Accumulated Amortization	(1,039)	(899)
Technology [Member]
Finite-lived intangible assets
Gross Carrying Amount	3,057	3,021
Accumulated Amortization	(1,031)	(860)
Customer Relationships [Member]
Finite-lived intangible assets
Gross Carrying Amount	12,073	11,816
Accumulated Amortization	$ (5,217)	$ (4,501)

X

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975

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