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Share Capital and Capital Surplus - Summary of Share Capital (Detail) - KRW (₩)	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disclosure of classes of share capital [abstract]
Authorized shares	200,000,000	200,000,000
Par value	₩ 5,000	₩ 5,000
Issued shares	80,932,952	82,624,377	84,571,230
Shared capital	₩ 482,403,125,000	₩ 482,403,125,000

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