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Investment Properties - Net Book Value of Investment Properties (Detail) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
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Disclosure of detailed information about investment property [Line Items] |  |  |
Investment properties | $ 720 | $ 763 | $ 653
Gross carrying amount [Member] |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |
Investment properties | 1,125 | 1,141 |
Accumulated depreciation [Member] |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |
Investment properties | (405) | (378) |
Land [Member] |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |
Investment properties | 430 | 429 |
Land [Member] | Gross carrying amount [Member] |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |
Investment properties | 430 | 429 |
Office buildings for rent [Member] |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |
Investment properties | 290 | 334 |
Office buildings for rent [Member] | Gross carrying amount [Member] |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |
Investment properties | 695 | 712 |
Office buildings for rent [Member] | Accumulated depreciation [Member] |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |
Investment properties | $ (405) | $ (378) |

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition Expiry date 2019-01-01: The amount of property (land or a building - or part of a building - or both) held (by the owner or by the lessee under a finance lease) to earn rentals or for capital appreciation or both, rather than for: (a) use in the production or supply of goods or services or for administrative purposes; or (b) sale in the ordinary course of business. Effective 2019-01-01: The amount of property (land or a building - or part of a building - or both) held (by the owner or by the lessee as a right-of-use asset) to earn rentals or for capital appreciation or both, rather than for: (a) use in the production or supply of goods or services or for administrative purposes; or (b) sale in the ordinary course of business. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 40 -IssueDate 2018-01-01 -Paragraph 76 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=40&date=2018-03-01&anchor=para_76&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 40 -IssueDate 2018-01-01 -Paragraph 79 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=40&date=2018-03-01&anchor=para_79_d&doctype=Standard -URIDate 2018-03-16 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 54 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_54_b&doctype=Standard -URIDate 2018-03-16 + Details
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- Details
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- Details
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- Details
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