v3.24.1

Retirement Benefit Plans - Additional Information (Detail) $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023 TWD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 TWD ($)	Dec. 31, 2021 TWD ($)	Dec. 31, 2023 USD ($)
Disclosure of defined benefit plans [line items]
Percentage of monthly pension contributions	6.00%	6.00%
Pension costs	$ 209,978	$ 6,857	$ 188,141	$ 214,599
Expected contribution to defined benefit plans			547,179
Expected contribution to defined benefit plans in 2023	600,399	19,608
Pension plans for executive managers [member]
Disclosure of defined benefit plans [line items]
Pension costs	11,898	389	7,735	32,836
Accrued pension liabilities	383,805		381,512		$ 12,534
Gains (losses) on remeasurements of defined benefit plans	$ 954	$ 31	$ 3,778	$ 17,292
Bottom of range [member]
Disclosure of defined benefit plans [line items]
Average duration of the defined benefit obligation	7 years	7 years	6 years
Top of range [member]
Disclosure of defined benefit plans [line items]
Average duration of the defined benefit obligation	13 years	13 years	13 years

X

- Definition

Percentage of employees monthly wages and salaries as contributions to defined benefit plan

+ References

No definition available.

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- Definition

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+ References

No definition available.

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- Definition

The estimate of the amounts expected to be paid from defined benefit plan in future. [Refer: Defined benefit plans [member]; Maturity [axis]]

+ References

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- Definition

The estimate of the expected contributions to be made to a defined benefit plan for the next annual reporting period. [Refer: Defined benefit plans [member]]

+ References

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- Definition

The amount of other comprehensive income, net of tax, related to gains (losses) on remeasurements of defined benefit plans, which comprise actuarial gains and losses; the return on plan assets, excluding amounts included in net interest on the net defined benefit liability (asset); and any change in the effect of the asset ceiling, excluding amounts included in net interest on the net defined benefit liability (asset). [Refer: Other comprehensive income; Defined benefit plans [member]; Plan assets [member]; Net defined benefit liability (asset)] [Contrast: Decrease (increase) in net defined benefit liability (asset) resulting from gain (loss) on remeasurement in other comprehensive income]

+ References

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- Definition

The amount of post-employment benefit expense included in profit or loss relating to defined benefit plans. [Refer: Profit (loss); Defined benefit plans [member]] [Contrast: Increase (decrease) in net defined benefit liability (asset) resulting from expense (income) in profit or loss]

+ References

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- Definition

The amount of deficit in a defined benefit plan. [Refer: Defined benefit plans [member]]

+ References

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- Definition

The weighted average duration of a defined benefit obligation. [Refer: Weighted average [member]]

+ References

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