FINANCIAL INFORMATION OF COLONY BANKCORP, INC. (PARENT ONLY) - Statements of Cash Flows, Parent Company (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 21,747	$ 19,542
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	1,701	1,743
Net cash provided by operating activities	20,983	49,741
CASH FLOWS FROM INVESTING ACTIVITIES
Net cash used in investing activities	(98,752)	(448,228)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuance of common stock	0	59,468
Cash paid for tax withholding related to vesting of restricted stock	(252)	(231)
Repurchase of shares	(406)	(540)
Dividends paid on common stock	(7,722)	(7,158)
Net cash provided by financing activities	80,413	281,933
Net increase (decrease) in cash and cash equivalents	2,644	(116,554)
Cash and cash equivalents at beginning of period	80,678	197,232
Cash and cash equivalents at end of period	83,322	80,678
Parent Company
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	21,747	19,542
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	1,701	1,743
Equity in undistributed earnings of subsidiaries	(24,502)	(11,517)
Amortization of debt issuance costs	93	55
Change in deferred taxes	0	(2,125)
Change in interest payable	14	45
Other	(1,977)	215
Net cash provided by operating activities	(2,924)	7,958
CASH FLOWS FROM INVESTING ACTIVITIES
Capital injection into Bank subsidiary	0	(53,000)
Net cash used in investing activities	0	(53,000)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase (decrease) in other borrowed money	0	26,560
Issuance of common stock	0	59,468
Cash paid for tax withholding related to vesting of restricted stock	(252)	(231)
Repurchase of shares	(406)	(540)
Dividends paid on common stock	(7,722)	(7,158)
Net cash provided by financing activities	(8,380)	78,099
Net increase (decrease) in cash and cash equivalents	(11,304)	33,057
Cash and cash equivalents at beginning of period	40,361	7,304
Cash and cash equivalents at end of period	$ 29,057	$ 40,361