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Others - Additional Information (Detail) ¥ in Thousands, $ in Thousands				1 Months Ended
	Dec. 27, 2020 TWD ($)	Jun. 30, 2020 CNY (¥)	Feb. 10, 2020 TWD ($)	Dec. 31, 2013 TWD ($)
Disclosure Detailed Information About Others [Line Items]
Contribution received from Environmental Protection	$ 55,062
Procuratorate [Member]
Disclosure Detailed Information About Others [Line Items]
Administrative fine imposed | ¥		¥ 400
Income from fines and penalties | ¥		¥ 344
Original Fine [Member]
Disclosure Detailed Information About Others [Line Items]
Administrative fine imposed				$ 102,014
New Fine [Member]
Disclosure Detailed Information About Others [Line Items]
Administrative fine imposed			$ 46,952

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- Definition

The gain on settlements of litigation.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The amount of income arising from fines and penalties.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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