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Supplementary Cash Flow Information - Partial Cash Paid for Investing and Financing Activities (Detail) $ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2019 TWD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 TWD ($) | Dec. 31, 2017 TWD ($)
Statement of cash flows [abstract] |  |  |  |
Purchase of property, plant and equipment | $ 4,896,656 |  | $ 4,945,570 | $ 4,849,331
Add: Beginning balance of payable to contractors and equipment suppliers | 1,516,735 |  | 713,313 | 839,983
Add :Beginning balance of payable on lease |  |  | 29,842 | 94,952
Less: Ending balance of payable to contractors and equipment suppliers | (972,770) |  | (1,516,735) | (878,065)
Less:Ending balance of payable on lease |  |  | (17,792) | (84,192)
Less: Transfer from prepaid equipment (shown as "Other non-current assets") |  |  |  | (139,304)
Cash paid during the year | $ 5,440,621 | $ 181,900 | $ 4,154,198 | 4,682,705
Disposal of a subsidiary |  |  |  | 2,166,151
Add: Ending balance of other payables |  |  |  | 64,393
Less: Cash and cash equivalents of discontinued operations |  |  |  | (449,331)
Cash received from disposal of a subsidiary |  |  |  | $ 1,781,213

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- Definition Amounts payable that the entity does not separately disclose in the same statement or note. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The cash outflow for the purchases of property, plant and equipment, classified as investing activities. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2019-01-01 -Paragraph 16 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2019-en-r&anchor=para_16_a&doctype=Standard -URIDate 2019-03-27 + Details
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