Goodwill and Other Intangibles - Finite and Indefinite-Lived Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Finite-lived intangible assets
Gross Carrying Amount	$ 24,260	$ 25,099
Accumulated Amortization	(11,244)	(10,978)
Indefinite-lived intangible assets Goodwill	16,958us-gaap_Goodwill	17,792us-gaap_Goodwill
Patents [Member]
Finite-lived intangible assets
Gross Carrying Amount	4,820	4,823
Accumulated Amortization	(4,801)	(4,730)
Land Use Rights [Member]
Finite-lived intangible assets
Gross Carrying Amount	1,202	1,247
Accumulated Amortization	(166)	(164)
Trademark [Member]
Finite-lived intangible assets
Gross Carrying Amount	1,815	1,888
Accumulated Amortization	(836)	(814)
Customer Backlog [Member]
Finite-lived intangible assets
Gross Carrying Amount	605	605
Accumulated Amortization	(605)	(605)
Technology [Member]
Finite-lived intangible assets
Gross Carrying Amount	3,275	3,432
Accumulated Amortization	(766)	(734)
Customer Relationships [Member]
Finite-lived intangible assets
Gross Carrying Amount	12,543	13,104
Accumulated Amortization	$ (4,070)	$ (3,931)

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

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=26713463&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

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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

-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

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