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Summary of Notes and Accounts Receivable (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | ---
Receivables [Abstract] |  |  |  |
Trade accounts receivable | $ 117,387 | $ 110,351 |  |
Allowance for doubtful accounts | (1,561) | (1,617) | $ (645) | $ (598)
Notes and accounts receivable, net | $ 115,826 | $ 108,734 |  |

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