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Goodwill and Other Intangibles - Finite and Indefinite-Lived Intangible Assets (Detail) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
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Finite-lived intangible assets |  |
Gross Carrying Amount | $ 31,595 | $ 31,962
Accumulated Amortization | (18,656) | (17,519)
Indefinite-lived intangible assets Goodwill | 28,695 | 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 | 1,324 | 1,286
Accumulated Amortization | (451) | (396)
Trademarks [Member] |  |
Finite-lived intangible assets |  |
Gross Carrying Amount | 1,857 | 1,756
Accumulated Amortization | (1,528) | (1,474)
Technology [Member] |  |
Finite-lived intangible assets |  |
Gross Carrying Amount | 7,453 | 7,673
Accumulated Amortization | (2,749) | (2,402)
Customer Relationships [Member] |  |
Finite-lived intangible assets |  |
Gross Carrying Amount | 16,148 | 16,441
Accumulated Amortization | $ (9,122) | $ (8,441)

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