SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Earnings Per Share (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income available to common shareholders	$ 412,154	$ 358,685	$ 269,105
Weighted average number of common shares outstanding (in shares)	68,448,812	68,808,830	68,977,453
Weighted average number of common shares outstanding used to calculate diluted earnings per share (in shares)	68,705,914	69,061,832	69,104,158
Effect of dilutive stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of dilutive (in shares)	0	0	45
Effect of dilutive restricted stock awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of dilutive (in shares)	118,472	128,611	62,534
Effect of performance stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of dilutive (in shares)	138,630	124,391	64,126

Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Ameris Bancorp 10-K