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Goodwill and Other Intangible Assets - Additional Information (Detail) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 USD ($) asset | Mar. 31, 2018 USD ($) | Dec. 31, 2018 USD ($)
Schedule Of Intangible Assets And Goodwill [Line Items] |  |  |
Goodwill | $ 139,304 |  | $ 139,304
Number of intangible assets | asset | 2 |  |
Net carrying amount of intangible asset | $ 3,689 |  | $ 3,800
Indefinite-Lived Trade Names |  |  |
Schedule Of Intangible Assets And Goodwill [Line Items] |  |  |
Indefinite life intangible asset | $ 17,300 |  |
Finite-Lived Trade Names |  |  |
Schedule Of Intangible Assets And Goodwill [Line Items] |  |  |
Remaining useful life of amortizing asset | 6 years 10 months 24 days |  | 7 years 2 months 12 days
Amortization expense | $ 134 | $ 134 |
Maracay |  |  |
Schedule Of Intangible Assets And Goodwill [Line Items] |  |  |
Intangible assets useful life | 20 years |  |
WRECO Transaction |  |  |
Schedule Of Intangible Assets And Goodwill [Line Items] |  |  |
Goodwill | $ 139,300 |  | $ 139,300

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