GOODWILL AND OTHER INTANGIBLE ASSETS - Summary of Components of Other Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 59,761	$ 59,772
Accumulated Amortization	21,771	12,007
Core deposit intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	48,530	48,530
Accumulated Amortization	18,706	10,911
Other client relationship intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,231	11,242
Accumulated Amortization	$ 3,065	$ 1,096