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Financial Risk Management and Fair Values of Financial Instruments - Information on Assets and Liabilities Denominated in Foreign Currencies whose Values would be Materially Affected by Exchange Rate Fluctuations (Detail) ¥ in Thousands, ¥ in Thousands, $ in Thousands, $ in Thousands	Dec. 31, 2023 TWD ($) $ / ¥ $ / $ $ / ¥	Dec. 31, 2023 USD ($) $ / ¥ $ / $ $ / ¥	Dec. 31, 2023 JPY (¥) $ / ¥ $ / $ $ / ¥	Dec. 31, 2023 CNY (¥) $ / ¥ $ / $ $ / ¥	Dec. 31, 2022 TWD ($) $ / ¥ $ / $ $ / ¥	Dec. 31, 2022 USD ($) $ / ¥ $ / $ $ / ¥	Dec. 31, 2022 JPY (¥) $ / ¥ $ / $ $ / ¥	Dec. 31, 2022 CNY (¥) $ / ¥ $ / $ $ / ¥
Disclosure of detailed information about financial instruments [Line Items]
Assets denominated in foreign currencies | $	$ 17,987,228				$ 15,034,220
Exchange rate	30.62	30.62	30.62	30.62
Currency Risk [member] | US$ [member]
Disclosure of detailed information about financial instruments [Line Items]
Assets denominated in foreign currencies	$ 4,600,745	$ 149,837			6,418,052	$ 208,989
Liabilities denominated in foreign currencies	$ 650,178	$ 21,175			$ 338,762	$ 11,031
Currency Risk [member] | US$ [member] | Financial Liability [member]
Disclosure of detailed information about financial instruments [Line Items]
Exchange rate | $ / $	30.705	30.705	30.705	30.705	30.71	30.71	30.71	30.71
Currency Risk [member] | US$ [member] | Financial Asset [member]
Disclosure of detailed information about financial instruments [Line Items]
Exchange rate | $ / $	30.705	30.705	30.705	30.705	30.71	30.71	30.71	30.71
Currency Risk [member] | JPY [member]
Disclosure of detailed information about financial instruments [Line Items]
Assets denominated in foreign currencies	$ 41,030		¥ 188,904		$ 26,712		¥ 114,940
Liabilities denominated in foreign currencies	$ 239,412		¥ 1,102,264		$ 368,989		¥ 1,587,732
Currency Risk [member] | JPY [member] | Financial Liability [member]
Disclosure of detailed information about financial instruments [Line Items]
Exchange rate	0.2172	0.2172	0.2172	0.2172	0.2324	0.2324	0.2324	0.2324
Currency Risk [member] | JPY [member] | Financial Asset [member]
Disclosure of detailed information about financial instruments [Line Items]
Exchange rate	0.2172	0.2172	0.2172	0.2172	0.2324	0.2324	0.2324	0.2324
Currency Risk [member] | RMB [member]
Disclosure of detailed information about financial instruments [Line Items]
Assets denominated in foreign currencies	$ 24,210			¥ 5,595	$ 31,733			¥ 7,199
Currency Risk [member] | RMB [member] | Financial Asset [member]
Disclosure of detailed information about financial instruments [Line Items]
Exchange rate	4.327	4.327	4.327	4.327	4.408	4.408	4.408	4.408
Other Risks [Member] | JPY [member]
Disclosure of detailed information about financial instruments [Line Items]
Assets denominated in foreign currencies	$ 120,317		¥ 553,946		$ 338,102		¥ 1,454,830
Other Risks [Member] | JPY [member] | Financial Asset [member]
Disclosure of detailed information about financial instruments [Line Items]
Exchange rate	0.2172	0.2172	0.2172	0.2172	0.2324	0.2324	0.2324	0.2324
Other Risks [Member] | RMB [member]
Disclosure of detailed information about financial instruments [Line Items]
Assets denominated in foreign currencies					$ 4,086,378			¥ 927,037
Other Risks [Member] | RMB [member] | Financial Asset [member]
Disclosure of detailed information about financial instruments [Line Items]
Exchange rate					4.408	4.408	4.408	4.408

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- Definition

The spot exchange rate at the end of the reporting period. Exchange rate is the ratio of exchange for two currencies. Spot exchange rate is the exchange rate for immediate delivery.

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