CONDENSED FINANCIAL INFORMATION OF AMERIS BANCORP (PARENT COMPANY ONLY) - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
OPERATING ACTIVITIES
Net income	$ 346,540	$ 376,913	$ 261,988
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation expense	6,706	7,948	3,810
(Decrease) increase in interest payable	6,217	(1,175)	(6,036)
(Increase) decrease in tax receivable	5,177	7,005	(12,062)
Provision for deferred taxes	(35,677)	38,411	(7,929)
Gain on sale of other investments	(270)	(532)	0
Change attributable to other operating activities	(4,991)	247	(97,730)
Net cash provided by operating activities	1,062,473	9,140	798,396
INVESTING ACTIVITIES
Proceeds from bank owned life insurance	101	1,309	3,381
Net cash used in investing activities	(4,874,530)	(420,984)	(1,200,726)
Financing Activities, net of effects of business combinations
Purchase of treasury shares	(22,421)	(9,439)	(7,995)
Dividends paid - common stock	(41,610)	(41,798)	(41,685)
Proceeds from other borrowings	3,950,000	0	7,202,981
Repayment of other borrowings	(2,814,576)	(296,325)	(8,176,491)
Proceeds from exercise of stock options	2,799	4,532	2,262
Net cash provided by financing activities	865,532	2,359,195	1,897,787
Net increase (decrease) in cash, cash equivalents and restricted cash	(2,946,525)	1,947,351	1,495,457
Cash, cash equivalents and restricted cash at beginning of period	4,064,657	2,117,306	621,849
Cash, cash equivalents and restricted cash at end of period	1,118,132	4,064,657	2,117,306
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest	86,643	48,960	94,786
Cash received during the year for income taxes	133,894	71,807	98,609
Ameris Bancorp
OPERATING ACTIVITIES
Net income	346,540	376,913	261,988
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation expense	6,706	7,948	3,810
Undistributed earnings of subsidiaries	(320,866)	(260,575)	(188,769)
(Decrease) increase in interest payable	(961)	(36)	847
(Increase) decrease in tax receivable	8,596	(6,238)	6,001
Provision for deferred taxes	(649)	1,694	(1,225)
Gain on sale of other investments	(270)	0	0
Change attributable to other operating activities	200	3,678	7,652
Total adjustments	(307,244)	(253,529)	(171,684)
Net cash provided by operating activities	39,296	123,384	90,304
INVESTING ACTIVITIES
Net (increase) decrease in other investments	213	(4,500)	(8,012)
Investment in subsidiary	(65,000)	0	(75,000)
Proceeds from bank owned life insurance	0	0	2,383
Net cash used in investing activities	(64,787)	(4,500)	(80,629)
Financing Activities, net of effects of business combinations
Purchase of treasury shares	(22,421)	(9,439)	(7,995)
Dividends paid - common stock	(41,610)	(41,798)	(41,685)
Proceeds from other borrowings	0	0	108,149
Repayment of other borrowings	0	0	(5,155)
Proceeds from exercise of stock options	2,799	4,532	2,262
Net cash provided by financing activities	(61,232)	(46,705)	55,576
Net increase (decrease) in cash, cash equivalents and restricted cash	(86,723)	72,179	65,251
Cash, cash equivalents and restricted cash at beginning of period	239,822	167,643	102,392
Cash, cash equivalents and restricted cash at end of period	153,099	239,822	167,643
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest	23,131	19,646	16,769
Cash received during the year for income taxes	$ (16,499)	$ (2,367)	$ (10,000)