CONDENSED FINANCIAL INFORMATION OF AMERIS BANCORP (PARENT COMPANY ONLY) - Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Assets
Cash and due from banks	$ 203,349	$ 246,234
Other assets	416,310	259,886
Total assets	20,438,638	18,242,579	$ 11,443,515
Liabilities
Other liabilities	272,586	179,378
Other borrowings	425,155	1,398,709
Subordinated deferrable interest debentures	124,345	127,560
Total liabilities	17,791,550	15,772,997
Shareholders' equity	2,647,088	2,469,582	$ 1,456,347	$ 804,479
Total liabilities and shareholders’ equity	20,438,638	18,242,579
Ameris Bancorp
Assets
Cash and due from banks	167,643	102,392
Investment in subsidiaries	2,911,488	2,688,952
Other assets	16,564	16,667
Total assets	3,095,695	2,808,011
Liabilities
Other liabilities	24,212	19,220
Other borrowings	300,050	191,649
Subordinated deferrable interest debentures	124,345	127,560
Total liabilities	448,607	338,429
Shareholders' equity	2,647,088	2,469,582
Total liabilities and shareholders’ equity	$ 3,095,695	$ 2,808,011