v3.26.3
GOODWILL AND CORE DEPOSIT INTANGIBLES - Narrative (Details) - USD ($)
9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Intangible Asset, Goodwill and Other [Abstract]        
Goodwill $ 418,000,000   $ 346,000,000 $ 346,000,000
Goodwill impairment $ 0 $ 0