BORROWINGS - Narrative (Details) - USD ($)		3 Months Ended				12 Months Ended
	May 20, 2022	Sep. 30, 2007	Mar. 31, 2007	Jun. 30, 2006	Jun. 30, 2004	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Lendable collateral value of loans pledged						$ 204,500,000	$ 235,200,000
Remaining credit availability						578,700,000	596,200,000
Available federal funds lines of credit						64,500,000	64,500,000
Federal funds lines of credit outstanding						0	0
Total borrowings						248,039,000	$ 238,445,000
Trust Preferred Securities Subject to Mandatory Redemption
Debt Instrument [Line Items]
Amount						24,229,000
Trust Preferred Securities Subject to Mandatory Redemption | Colony Bankcorp Statutory Trust III
Debt Instrument [Line Items]
Amount						$ 4,640,000
Subordinated debentures						2.68%
Proceeds from issuance of trust preferred securities					$ 4,500,000
Trust preferred securities, term (in years)					30 years
Trust preferred securities, redemption restriction period (in years)					5 years
Trust Preferred Securities Subject to Mandatory Redemption | Colony Bankcorp Capital Trust I
Debt Instrument [Line Items]
Amount						$ 5,155,000
Subordinated debentures						1.50%
Proceeds from issuance of trust preferred securities				$ 5,000,000
Trust preferred securities, term (in years)				30 years
Trust preferred securities, redemption restriction period (in years)				5 years
Trust Preferred Securities Subject to Mandatory Redemption | Colony Bankcorp Capital Trust II
Debt Instrument [Line Items]
Amount						$ 9,279,000
Subordinated debentures						1.65%
Proceeds from issuance of trust preferred securities			$ 9,000,000
Trust preferred securities, term (in years)			30 years
Trust preferred securities, redemption restriction period (in years)			5 years
Trust Preferred Securities Subject to Mandatory Redemption | Colony Bankcorp Capital Trust III
Debt Instrument [Line Items]
Amount						$ 5,155,000
Subordinated debentures						1.40%
Proceeds from issuance of trust preferred securities		$ 5,000,000
Trust preferred securities, term (in years)		30 years
Trust preferred securities, redemption restriction period (in years)		5 years
Subordinated Debt
Debt Instrument [Line Items]
Amount	$ 39,500,000
Interest rate (as percent)	5.25%					5.25%	5.25%
Subordinated debentures	2.65%
Total borrowings						$ 38,800,000
Subordinated Debt, Fixed Rate
Debt Instrument [Line Items]
Debt instrument term (in years)	5 years
Subordinated Debt, Variable Rate
Debt Instrument [Line Items]
Debt instrument term (in years)	5 years
Federal Reserve Bank of Atlanta
Debt Instrument [Line Items]
Federal funds lines of credit outstanding						$ 0	$ 0
FRB Term Funding Program
Debt Instrument [Line Items]
Debt instrument term (in years)							1 year
FRB Term Funding Program | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity							$ 100,000,000