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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