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Goodwill and Other Intangibles - Finite and Indefinite-Lived Intangible Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Finite-lived intangible assets
Gross Carrying Amount	$ 22,589	$ 22,445
Accumulated Amortization	(14,271)	(13,987)
Indefinite-lived intangible assets Goodwill	25,465	15,621
Patents [Member]
Finite-lived intangible assets
Gross Carrying Amount	4,806	4,806
Accumulated Amortization	(4,806)	(4,788)
Land Use Rights [Member]
Finite-lived intangible assets
Gross Carrying Amount	1,145	1,134
Accumulated Amortization	(203)	(203)
Trademarks [Member]
Finite-lived intangible assets
Gross Carrying Amount	1,721	1,707
Accumulated Amortization	(1,281)	(1,247)
Technology [Member]
Finite-lived intangible assets
Gross Carrying Amount	3,022	2,994
Accumulated Amortization	(1,381)	(1,334)
Customer Relationships [Member]
Finite-lived intangible assets
Gross Carrying Amount	11,895	11,804
Accumulated Amortization	$ (6,600)	$ (6,415)

X

- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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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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-Publisher FASB
-Name Accounting Standards Codification
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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

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