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Bonds Payable (Tables) | 12 Months Ended
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Dec. 31, 2021
Text block [abstract] |
Summary of Bonds Payable |
|  | December 31 |
|  | 2020 |  |  | 2021 |
|  | NT$ |  |  | NT$ |  |  | US$ (Note 4) |
Unsecured domestic bonds |  |  |  |  |  |  |  |  |  |  |  |
Interest due annually with annual interest rate at 1.30% and fully redeemed in January 2021 |  | $ | 7,000,000 |  |  | $ | — |  |  | $ | — |
Repayable at maturity in January 2023 and interest due annually with annual interest rate at 1.50% |  |  | 2,000,000 |  |  |  | 2,000,000 |  |  |  | 72,098 |
Repayable at maturity in January 2022 and interest due annually with annual interest rate at 1.25% |  |  | 3,700,000 |  |  |  | 3,700,000 |  |  |  | 133,381 |
Repayable at maturity in January 2024 and interest due annually with annual interest rate at 1.45% |  |  | 4,300,000 |  |  |  | 4,300,000 |  |  |  | 155,011 |
Repayable at maturity in April 2024 and interest due annually with annual interest rate at 0.90% |  |  | 6,500,000 |  |  |  | 6,500,000 |  |  |  | 234,319 |
Repayable at maturity in April 2026 and interest due annually with annual interest rate at 1.03% |  |  | 3,500,000 |  |  |  | 3,500,000 |  |  |  | 126,172 |
Repayable at maturity in April 2025 and interest due annually with annual interest rate at 0.90% |  |  | 10,000,000 |  |  |  | 10,000,000 |  |  |  | 360,490 |
Repayable at maturity in August 2023 and interest due annually with annual interest rate at 0.72% |  |  | 3,000,000 |  |  |  | 3,000,000 |  |  |  | 108,147 |
Repayable at maturity in August 2025 and interest due annually with annual interest rate at 0.85% |  |  | 5,000,000 |  |  |  | 5,000,000 |  |  |  | 180,245 |
Repayable at maturity in August 2027 and interest due annually with annual interest rate at 0.95% |  |  | 2,000,000 |  |  |  | 2,000,000 |  |  |  | 72,098 |
Unsecured overseas bonds |  |  |  |  |  |  |  |  |  |  |  |
US$200,000 thousand (linked to New Taiwan dollar), repayable at maturity in October 2022 and interest due quarterly with annual interest rate at 2.15% |  |  | 6,204,800 |  |  |  | 6,204,800 |  |  |  | 223,677 |
US$100,000 thousand (linked to New Taiwan dollar), repayable at maturity in October 2024 and interest due quarterly with annual interest rate at 2.50% |  |  | 3,102,400 |  |  |  | 3,102,400 |  |  |  | 111,839 |
Unsecured overseas convertible bonds |  |  |  |  |  |  |  |  |  |  |  |
RMB779,801 thousand, repayable at maturity in March 2027 and interest due annually with annual interest rate at 0.10%, 0.20%, 0.60%, 1.30%, 1.80% and 2.00% for the first, second, third, fourth, fifth and sixth year, respectively |  |  | — |  |  |  | 3,385,381 |  |  |  | 122,040 |
|  |  | 56,307,200 |  |  |  | 52,692,581 |  |  |  | 1,899,517 |
Less: discounts on bonds payable |  |  | 53,646 |  |  |  | 425,244 |  |  |  | 15,330 |
|  |  | 56,253,554 |  |  |  | 52,267,337 |  |  |  | 1,884,187 |
Less: current portion of bonds payable |  |  | 6,999,951 |  |  |  | 9,902,710 |  |  |  | 356,983 |
|  | $ | 49,253,603 |  |  | $ | 42,364,627 |  |  | $ | 1,527,204 |

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