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Earnings Per Share - Basic And Diluted Earnings Per Share (Detail) - KRW (₩)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Earnings per share [abstract]
Profit attribute to controlling interest	₩ 690,685,596,779	₩ 1,125,379,754,922	₩ 1,698,202,436,726
Weighted-average number of common shares outstanding	75,620,779	75,767,552	75,869,542
Basic earnings per share	₩ 9,134	₩ 14,853	₩ 22,383
Total number of common shares issued	81,350,016	83,761,569	84,571,230
Weighted-average number of treasury shares	(5,729,237)	(7,994,017)	(8,701,688)

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- Definition

The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator) divided by the weighted average number of ordinary shares outstanding during the period (the denominator).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Profit attribute to controlling interest.

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- Definition

Total number of common shares issued.

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- Definition

Weighted average number of treasury shares.

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