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v3.20.1

Related Party Transactions - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of transactions between related parties [Line Items] |  |  |
Other income | $ 717 | $ 1,817 | $ 214
Immediate Holding Company [Member] |  |  |
Disclosure of transactions between related parties [Line Items] |  |  |
Income from discharge of liability |  | 1,537 |
Other income |  | $ 1,537 |
Bottom of range [Member] | PEWC Singapore Co. (Pte) Ltd. [Member] |  |  |
Disclosure of transactions between related parties [Line Items] |  |  |
Interest rates on the balance due to related party | 3.09% | 2.70% |
Top Of Range [Member] | PEWC Singapore Co. (Pte) Ltd. [Member] |  |  |
Disclosure of transactions between related parties [Line Items] |  |  |
Interest rates on the balance due to related party | 3.79% | 3.40% |

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- Definition Income from discharge of liability. + References No definition available. + Details
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- Definition Interest rates on balances due to related party. + References No definition available. + Details
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- Definition Other non-operating income. + References No definition available. + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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