BUSINESS COMBINATION - Narrative (Details) $ / shares in Units, $ in Thousands			12 Months Ended
	Dec. 01, 2025 USD ($) bank $ / shares shares	Apr. 01, 2025 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Business Combination [Line Items]
Finite-lived intangible asset, useful life (in years)			10 years
Goodwill			$ 63,873	$ 48,923	$ 48,923
Cash consideration paid			$ 3,500	$ 0
Ellerbee Agency
Business Combination [Line Items]
Consideration paid		$ 3,500
Intangible asset acquired		$ 1,400
Finite-lived intangible asset, useful life (in years)		10 years
Goodwill		$ 1,900
TC Bancshares, Inc
Business Combination [Line Items]
Consideration paid	$ 81,280
Intangible asset acquired	4,622
Goodwill	$ 13,002
Number of banking locations | bank	4
Cash paid in exchange for each share (in dollars per share) | $ / shares	$ 21.25
Shares exchanged for each share (in shares) | shares	1.25
Shares of CBAN common stock issued to TCBC shareholders (in shares) | shares	3,839,613
Fair value of shares issued	$ 65,900
Cash consideration paid	15,430
TC Bancshares, Inc | Core deposit intangible
Business Combination [Line Items]
Finite-lived intangible assets acquired	$ 4,600