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Goodwill and Other Intangibles - Finite and Indefinite-Lived Intangible Assets (Detail) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
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Finite-lived intangible assets |  |
Gross Carrying Amount | $ 22,684 | $ 23,274
Accumulated Amortization | (13,591) | (13,254)
Indefinite-lived intangible assets Goodwill | 15,867 | 16,544
Patents [Member] |  |
Finite-lived intangible assets |  |
Gross Carrying Amount | 4,806 | 4,806
Accumulated Amortization | (4,802) | (4,791)
Land Use Rights [Member] |  |
Finite-lived intangible assets |  |
Gross Carrying Amount | 1,151 | 1,199
Accumulated Amortization | (203) | (201)
Trademarks [Member] |  |
Finite-lived intangible assets |  |
Gross Carrying Amount | 1,716 | 1,770
Accumulated Amortization | (1,190) | (1,166)
Technology [Member] |  |
Finite-lived intangible assets |  |
Gross Carrying Amount | 3,027 | 3,149
Accumulated Amortization | (1,263) | (1,215)
Customer Relationships [Member] |  |
Finite-lived intangible assets |  |
Gross Carrying Amount | 11,984 | 12,350
Accumulated Amortization | $ (6,133) | $ (5,881)

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