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v3.23.1

Financial Statements Schedule: Valuation and Qualifying Accounts (Detail) - TWD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Allowance for Impairment of property, plant and equipment [member] |  |  |
Disclosure of details of valuation and qualifying accounts [Line Items] |  |  |
January 1 | $ 183,179 | $ 182,002 | $ 193,340
Additions charged to expense or deduction of revenue | 12,721 | 4,843 |
Deduction/Write-offs/Reversal | (1,433) | (3,666) | (11,338)
December 31 | 194,467 | 183,179 | 182,002
Allowance for Impairment of Obsolescence and Decline in Market Value of Inventories [Member] |  |  |
Disclosure of details of valuation and qualifying accounts [Line Items] |  |  |
January 1 | 121,586 | 79,815 | 63,498
Additions charged to expense or deduction of revenue |  | 41,771 | 16,317
Deduction/Write-offs/Reversal | (15,956) |  |
December 31 | 105,630 | 121,586 | 79,815
Provision for deficiency compensation [member] |  |  |
Disclosure of details of valuation and qualifying accounts [Line Items] |  |  |
January 1 | 4,281 | 3,463 | 1,998
Additions charged to expense or deduction of revenue | 79,827 | 11,898 | 4,358
Deduction/Write-offs/Reversal | (57,465) | (11,080) | (2,893)
December 31 | 26,643 | 4,281 | 3,463
Sales for allowance [member] |  |  |
Disclosure of details of valuation and qualifying accounts [Line Items] |  |  |
January 1 | 9,849 | 9,864 | 26,000
Additions charged to expense or deduction of revenue | 94,641 | 34,744 | 21,916
Deduction/Write-offs/Reversal | (67,367) | (34,759) | (38,052)
December 31 | $ 37,123 | $ 9,849 | $ 9,864

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- Definition Valuation allowances and reserves. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Valuation allowances and reserves charged to expense. + References No definition available. + Details
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- Definition Valuation allowances and reserves deductions. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to 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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