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Goodwill and Other Intangibles - Finite and Indefinite-Lived Intangible Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Finite-lived intangible assets
Gross Carrying Amount	$ 32,023	$ 31,962
Accumulated Amortization	(18,368)	(17,519)
Indefinite-lived intangible assets Goodwill	29,316	29,508
Patents [Member]
Finite-lived intangible assets
Gross Carrying Amount	4,813	4,806
Accumulated Amortization	(4,806)	(4,806)
Land Use Rights [Member]
Finite-lived intangible assets
Gross Carrying Amount	1,346	1,286
Accumulated Amortization	(442)	(396)
Trademarks [Member]
Finite-lived intangible assets
Gross Carrying Amount	1,872	1,756
Accumulated Amortization	(1,509)	(1,474)
Technology [Member]
Finite-lived intangible assets
Gross Carrying Amount	7,593	7,673
Accumulated Amortization	(2,657)	(2,402)
Customer Relationships [Member]
Finite-lived intangible assets
Gross Carrying Amount	16,399	16,441
Accumulated Amortization	$ (8,954)	$ (8,441)

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/disclosureRef
-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/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004

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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/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(10)(1))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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