CONDENSED FINANCIAL INFORMATION OF AMERIS BANCORP (PARENT COMPANY ONLY) - Schedule of Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
OPERATING ACTIVITIES
Net income	$ 269,105	$ 346,540	$ 376,913
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation expense	9,950	6,706	7,948
Decrease increase in interest payable	26,946	6,217	(1,175)
(Increase) decrease in tax receivable	2,271	5,177	7,005
Provision for deferred taxes	(20,468)	(35,677)	38,411
Gain on sale of other investments	0	(270)	(532)
Change attributable to other operating activities	22,157	(4,991)	247
Net cash provided by operating activities	568,959	1,062,473	9,140
INVESTING ACTIVITIES
Net cash used in investing activities	(338,194)	(4,874,530)	(420,984)
Financing Activities, net of effects of business combinations
Purchase of treasury shares	(20,346)	(22,421)	(9,439)
Dividends paid - common stock	(41,649)	(41,610)	(41,798)
Repayment of other borrowings	(17,207,845)	(2,814,576)	(296,325)
Proceeds from exercise of stock options	476	2,799	4,532
Net cash provided by (used in) financing activities	(181,593)	865,532	2,359,195
Net increase (decrease) in cash, cash equivalents and restricted cash	49,172	(2,946,525)	1,947,351
Cash, cash equivalents and restricted cash at beginning of period	1,118,132	4,064,657	2,117,306
Cash, cash equivalents and restricted cash at end of period	1,167,304	1,118,132	4,064,657
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest	418,445	86,643	48,960
Cash received during the year for income taxes	101,328	133,894	71,807
Ameris Bancorp
OPERATING ACTIVITIES
Net income	269,105	346,540	376,913
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation expense	9,950	6,706	7,948
Undistributed earnings of subsidiaries	(121,331)	(320,866)	(260,575)
Decrease increase in interest payable	(319)	(961)	(36)
(Increase) decrease in tax receivable	3,021	8,596	(6,238)
Provision for deferred taxes	(1,165)	(649)	1,694
Gain on sale of other investments	0	(270)	0
Change attributable to other operating activities	1,188	200	3,678
Total adjustments	(108,656)	(307,244)	(253,529)
Net cash provided by operating activities	160,449	39,296	123,384
INVESTING ACTIVITIES
Net (increase) decrease in other investments	0	213	(4,500)
Investment in subsidiary	0	(65,000)	0
Net cash used in investing activities	0	(64,787)	(4,500)
Financing Activities, net of effects of business combinations
Purchase of treasury shares	(20,346)	(22,421)	(9,439)
Dividends paid - common stock	(41,649)	(41,610)	(41,798)
Repayment of other borrowings	(86,850)	0	0
Proceeds from exercise of stock options	476	2,799	4,532
Net cash provided by (used in) financing activities	(148,369)	(61,232)	(46,705)
Net increase (decrease) in cash, cash equivalents and restricted cash	12,080	(86,723)	72,179
Cash, cash equivalents and restricted cash at beginning of period	153,099	239,822	167,643
Cash, cash equivalents and restricted cash at end of period	165,179	153,099	239,822
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest	24,887	23,131	19,646
Cash received during the year for income taxes	$ (12,593)	$ (16,499)	$ (2,367)