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Financial statements schedule: valuation and qualifying accounts (Tables) | 12 Months Ended
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Dec. 31, 2023
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] |
Disclosure Of Details Of Valuation And Qualifying Accounts | 43. Financial statements schedule: valuation and qualifying accounts
|  | January 1 |  | Additions charged to expense or deduction of revenue |  | Deduction / Write-offs / Reversal |  | December 31
|  | NT$000 |  | NT$000 |  | NT$000 |  | NT$000
Year 2021 |  |  |  |  |  |  |  |
Allowance for impairment of property, plant and equipment |  | 182,002 |  | 4,843 |  | (3,666) |  | 183,179
Allowance for impairment of obsolescence and decline in market value of inventories |  | 79,815 |  | 41,771 |  | — |  | 121,586
Provision for deficiency compensation |  | 3,463 |  | 11,898 |  | (11,080) |  | 4,281
Sales for allowance |  | 9,864 |  | 34,744 |  | (34,759) |  | 9,849
Year 2022 |  |  |  |  |  |  |  |
Allowance for impairment of property, plant and equipment |  | 183,179 |  | 12,721 |  | (1,433) |  | 194,467
Allowance for impairment of obsolescence and decline in market value of inventories |  | 121,586 |  | — |  | (15,956) |  | 105,630
Provision for deficiency compensation |  | 4,281 |  | 79,827 |  | (57,465) |  | 26,643
Sales for allowance |  | 9,849 |  | 94,641 |  | (67,367) |  | 37,123
Year 2023 |  |  |  |  |  |  |  |
Allowance for impairment of property, plant and equipment |  | 194,467 |  | 9,236 |  | — |  | 203,703
Allowance for impairment of obsolescence and decline in market value of inventories |  | 105,630 |  | 80,633 |  | — |  | 186,263
Provision for deficiency compensation |  | 26,643 |  | 21,495 |  | (14,574) |  | 33,564
Sales for allowance |  | 37,123 |  | 112,488 |  | (111,944) |  | 37,667
For movements in loss allowance for contract assets, accounts receivable, and other receivables, please refer to Note 41 a).

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- Definition The entire disclosure for valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 -Publisher SEC Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-4 + Details
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