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Income Tax - Summary of Current Tax Assets and Liabilities (Detail) $ in Thousands, $ in Thousands | Dec. 31, 2019 TWD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 TWD ($)
--- | --- | --- | ---
Current tax assets |  |  |
Tax refund receivable | $ 90,569 | $ 3,028 | $ 50,456
Prepaid income tax | 462,523 | 15,464 | 473,807
Current tax assets | 553,092 | 18,492 | 524,263
Current tax liabilities |  |  |
Income tax payable | $ 4,858,578 | $ 162,440 | $ 6,781,136

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