GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Carrying Amount of Goodwill by Operating Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Goodwill and other intangibles assets
Total goodwill	$ 383,280	$ 333,695
Banking
Goodwill and other intangibles assets
Total goodwill	360,180	310,595
Wealth Management
Goodwill and other intangibles assets
Total goodwill	14,108	14,108
FirsTech
Goodwill and other intangibles assets
Total goodwill	$ 8,992	$ 8,992