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Investments Accounted for Using the Equity Method - Summary of Fair Values of Investments in Associates with Available Published Price Quotation (Detail) - Level 1 of fair value hierarchy [member] $ in Thousands, $ in Thousands | Dec. 31, 2022 TWD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 TWD ($)
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Hung Ching Development & Construction Co. [member] |  |  |
Disclosure of associates and joint ventures [line items] |  |  |
Fair value of investments in associates with available published price quotation | $ 1,420,636 | $ 46,230 | $ 2,141,249
ChipMos Technologies Inc [member] |  |  |
Disclosure of associates and joint ventures [line items] |  |  |
Fair value of investments in associates with available published price quotation | $ 2,643,498 | $ 86,023 | $ 3,835,045

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- Definition The fair value of investments in associates if there are quoted market prices for the investment. [Refer: Associates [member]; Investments in associates reported in separate financial statements] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2022-03-24 -Paragraph 21 -Subparagraph b -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2022-en-r&anchor=para_21_b_iii&doctype=Standard -URIDate 2022-03-24 + Details
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