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Assets Pledged as Collateral - Summary of Assets Pledged as Collateral (Detail) - TWD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022
Assets Pledged As Collateral [Line Items] |  |
Assets pledged as collateral | $ 14,027,423 | $ 21,909,250
Refundable deposits time deposit [member] | Customs [member] |  |
Assets Pledged As Collateral [Line Items] |  |
Assets pledged as collateral | $ 813,289 | 812,248
Purpose of pledge | Customs duty guarantee |
Refundable deposits time deposit [member] | Science Park Bureau [member] |  |
Assets Pledged As Collateral [Line Items] |  |
Assets pledged as collateral | $ 236,556 | 236,587
Purpose of pledge | Collateral for land lease |
Refundable deposits time deposit [member] | Science Park Bureau [member] | Dormitory Lease [member] |  |
Assets Pledged As Collateral [Line Items] |  |
Assets pledged as collateral | $ 18,647 | 29,371
Purpose of pledge | Collateral for dormitory lease |
Refundable deposits time deposit [member] | National Property Administration, Ministry of Finance [member] |  |
Assets Pledged As Collateral [Line Items] |  |
Assets pledged as collateral | $ 64,950 | 64,950
Purpose of pledge | Guarantee for the application of national non-public use land for development |
Refundable deposits time deposit [member] | Bureau of Land Administration, Tainan City Government [Member] |  |
Assets Pledged As Collateral [Line Items] |  |
Assets pledged as collateral | $ 8,118 | 8,118
Purpose of pledge | Guarantee for the application of national non-public use land for development |
Refundable deposits time deposit [member] | Liquefied Natural Gas Business Division, CPC Corporation, Taiwan [member] |  |
Assets Pledged As Collateral [Line Items] |  |
Assets pledged as collateral | $ 36,970 | 34,100
Purpose of pledge | Energy resources guarantee |
Refundable deposits time deposit [member] | Bank of China and Agricultural Bank of China [member] |  |
Assets Pledged As Collateral [Line Items] |  |
Assets pledged as collateral | $ 1,006,852 | 1,043,840
Purpose of pledge | Bank performance guarantee |
Refundable deposits time deposit [member] | CTBC Bank Singapore Branch [member] |  |
Assets Pledged As Collateral [Line Items] |  |
Assets pledged as collateral | $ 459,900 | 459,750
Purpose of pledge | Collateral for letter of credit |
Buildings [member] | Taiwan Cooperative Bank and Secured Syndicated Loans from China Development Bank and 6 others [member] |  |
Assets Pledged As Collateral [Line Items] |  |
Assets pledged as collateral | $ 4,487,730 | 4,828,597
Purpose of pledge | Collateral for long-term loans |
Machinery and equipment [member] | Taiwan Cooperative Bank, Mega International Commercial Bank, KGI Bank, First Commercial Bank, Shanghai Commercial Bank, CTBC Bank and Secured Syndicated Loans from China Development Bank and 6 others [member] |  |
Assets Pledged As Collateral [Line Items] |  |
Assets pledged as collateral | $ 6,627,761 | 14,066,044
Purpose of pledge | Collateral for long-term loans |
Transportation equipment [member] | Secured Syndicated Loans from China Development Bank and 6 others [member] |  |
Assets Pledged As Collateral [Line Items] |  |
Assets pledged as collateral | $ 0 | 592
Purpose of pledge | Collateral for long-term loans |
Furniture and fixtures [member] | Secured Syndicated Loans from China Development Bank and 6 others [member] |  |
Assets Pledged As Collateral [Line Items] |  |
Assets pledged as collateral | $ 0 | 46,823
Purpose of pledge | Collateral for long-term loans |
Right-of-use assets [member] | Secured Syndicated Loans from China Development Bank and 6 others [member] |  |
Assets Pledged As Collateral [Line Items] |  |
Assets pledged as collateral | $ 266,650 | $ 278,230
Purpose of pledge | Collateral for long-term loans |

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