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Assets Pledged as Collateral (Tables) | 12 Months Ended
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Dec. 31, 2023
Disclosure Of Assets Pledged As Collateral [Abstract] |
Summary of Assets Pledged as Collateral | The following table lists assets of the Company pledged as collateral:
|  | As of December 31, |  |  |  |  |
|  | 2022 |  |  | 2023 |  |  | Party to which asset(s) was pledged |  | Purpose of pledge
|  | NT$ |  |  | NT$ |  |  |  |  |
|  | (In Thousands) |  |  | (In Thousands) |  |  |  |  |
Refundable Deposits (Time deposit) |  | $ | 812,248 |  |  | $ | 813,289 |  |  | Customs |  | Customs duty guarantee
Refundable Deposits (Time deposit) |  |  | 236,587 |  |  |  | 236,556 |  |  | Science Park Bureau |  | Collateral for land lease
Refundable Deposits (Time deposit) |  |  | 29,371 |  |  |  | 18,647 |  |  | Science Park Bureau |  | Collateral for dormitory lease
Refundable Deposits (Time deposit) |  |  | 64,950 |  |  |  | 64,950 |  |  | National Property Administration, Ministry of Finance |  | Guarantee for the application of national non-public use land for development
Refundable Deposits (Time deposit) |  |  | 8,118 |  |  |  | 8,118 |  |  | Bureau of Land Administration, Tainan City Government |  | Guarantee for the application of national non-public use land for development
Refundable Deposits (Time deposit) |  |  | 34,100 |  |  |  | 36,970 |  |  | Liquefied Natural Gas Business Division, CPC Corporation, Taiwan |  | Energy resources guarantee
Refundable Deposits (Time deposit) |  |  | 1,043,840 |  |  |  | 1,006,852 |  |  | Bank of China and Agricultural Bank of China |  | Bank performance guarantee
Refundable Deposits (Time deposit) |  |  | 459,750 |  |  |  | 459,900 |  |  | CTBC Bank Singapore Branch |  | Collateral for letter of credit
Buildings |  |  | 4,828,597 |  |  |  | 4,487,730 |  |  | Taiwan Cooperative Bank and Secured Syndicated Loans from China Development Bank and 6 others |  | Collateral for long-term loans
Machinery and equipment |  |  | 14,066,044 |  |  |  | 6,627,761 |  |  | 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 |  | Collateral for long-term loans
Transportation equipment |  |  | 592 |  |  |  | — |  |  | Secured Syndicated Loans from China Development Bank and 6 others |  | Collateral for long-term loans
Furniture and fixtures |  |  | 46,823 |  |  |  | — |  |  | Secured Syndicated Loans from China Development Bank and 6 others |  | Collateral for long-term loans
Right-of-use assets |  |  | 278,230 |  |  |  | 266,650 |  |  | Secured Syndicated Loans from China Development Bank and 6 others |  | Collateral for long-term loans
Total |  | $ | 21,909,250 |  |  | $ | 14,027,423 |  |  |  |  |

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