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Investment Properties - Summary of Maturity Analysis Of Operating Lease Payments (Detail) $ in Thousands, $ in Thousands | Dec. 31, 2022 TWD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 TWD ($)
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Disclosure of detailed information about investment property [line items] |  |  |
Undiscounted operating lease payments to be received | $ 8,474,870 | $ 275,784 | $ 9,500,632
Year 1 [member] |  |  |
Disclosure of detailed information about investment property [line items] |  |  |
Undiscounted operating lease payments to be received | 1,683,010 | 54,768 | 1,693,659
Year 2 [member] |  |  |
Disclosure of detailed information about investment property [line items] |  |  |
Undiscounted operating lease payments to be received | 1,380,058 | 44,909 | 1,405,450
Year 3 [member] |  |  |
Disclosure of detailed information about investment property [line items] |  |  |
Undiscounted operating lease payments to be received | 1,119,779 | 36,439 | 1,210,891
Year 4 [member] |  |  |
Disclosure of detailed information about investment property [line items] |  |  |
Undiscounted operating lease payments to be received | 990,867 | 32,244 | 1,019,498
Year 5 [member] |  |  |
Disclosure of detailed information about investment property [line items] |  |  |
Undiscounted operating lease payments to be received | 808,851 | 26,321 | 929,609
Year 6 onwards [member] |  |  |
Disclosure of detailed information about investment property [line items] |  |  |
Undiscounted operating lease payments to be received | $ 2,492,305 | $ 81,103 | $ 3,241,525

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- Definition The amount of undiscounted operating lease payments to be received. Operating lease is a lease that does not transfer substantially all the risks and rewards incidental to ownership of an underlying asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2022-03-24 -Paragraph 97 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2022-en-r&anchor=para_97&doctype=Standard -URIDate 2022-03-24 + Details
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