Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Intangible Assets Net Excluding Goodwill [Line Items]
Amortizable intangible assets, carrying Value	$ 29,244	$ 29,544
Amortizable intangible assets, accumulated Amortization	20,135	21,432
Amortizable intangible assets, net Intangible	9,109us-gaap_FiniteLivedIntangibleAssetsNet	8,112us-gaap_FiniteLivedIntangibleAssetsNet
Product Technology
Intangible Assets Net Excluding Goodwill [Line Items]
Amortizable intangible assets, carrying Value	9,065	10,917
Amortizable intangible assets, accumulated Amortization	8,215	9,710
Amortizable intangible assets, net Intangible	850	1,207
Patents
Intangible Assets Net Excluding Goodwill [Line Items]
Amortizable intangible assets, carrying Value	12,169	10,599
Amortizable intangible assets, accumulated Amortization	4,621	4,118
Amortizable intangible assets, net Intangible	7,548	6,481
Other
Intangible Assets Net Excluding Goodwill [Line Items]
Amortizable intangible assets, carrying Value	8,010	8,028
Amortizable intangible assets, accumulated Amortization	7,299	7,604
Amortizable intangible assets, net Intangible	$ 711	$ 424

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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=26713463&loc=d3e16323-109275

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+ References

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