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Leasing arrangements - leasee (Tables) | 12 Months Ended
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Dec. 31, 2021
Presentation of leases for lessee [abstract] |
Summary of carrying amount of right-of-use assets and the depreciation expenses |
|  | December 31, 2020 |  |  | December 31, 2021 |
|  | Carrying amount |  |  | Carrying amount |
|  | NT$000 |  |  | NT$000 |
Land |  |  | 636,261 |  |  |  | 616,458 |
Buildings |  |  | 19,044 |  |  |  | 10,946 |
Machinery and equipment |  |  | 203,249 |  |  |  | 204,484 |
Others |  |  | 515 |  |  |  | 3,917 |
|  |  | 859,069 |  |  |  | 835,805 |
|  | Year ended December 31, |
|  | 2019 |  |  | 2020 |  |  | 2021 |
|  | Depreciation expenses |  |  | Depreciation expenses |  |  | Depreciation expenses |
|  | NT$000 |  |  | NT$000 |  |  | NT$000 |
Land |  |  | 22,657 |  |  |  | 20,938 |  |  |  | 20,486 |
Buildings |  |  | 7,113 |  |  |  | 7,819 |  |  |  | 9,870 |
Machinery and equipment |  |  | 4,520 |  |  |  | 46,225 |  |  |  | 247,090 |
Others |  |  | 1,809 |  |  |  | 1,544 |  |  |  | 1,634 |
|  |  | 36,099 |  |  |  | 76,526 |  |  |  | 279,080 |
Summary of profit and loss accounts relating to lease contracts | The information on profit or loss accounts relating to lease contracts is as follows:
|  | Year ended December 31, |
|  | 2019 |  |  | 2020 |  |  | 2021 |
|  | NT$000 |  |  | NT$000 |  |  | NT$000 |
Items affecting profit or loss |  |  |  |  |  |  |  |  |  |  |  |
Interest expense on lease liabilities |  |  | 14,349 |  |  |  | 13,442 |  |  |  | 15,245 |
Expense on short-term lease contracts |  |  | 230,589 |  |  |  | 202,782 |  |  |  | 143,791 |

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