Regulatory Matters - Company's and Bank's Actual Capital Amounts and Ratios (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Consolidated [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital to Risk Weighted Assets Actual Amount	$ 353,777	$ 331,545
Total Capital to Risk Weighted Assets Actual Ratio	15.32%	18.74%
Total Capital to Risk Weighted Assets For Capital Adequacy Purposes Amount	184,784	141,516
Total Capital to Risk Weighted Assets For Capital Adequacy Purposes Ratio	8.00%	8.00%
Tier I Capital to Risk Weighted Assets Actual Amount	331,400	309,415
Tier I Capital to Risk Weighted Assets Actual Ratio	14.35%	17.49%
Tier I Capital to Risk Weighted Assets For Capital Adequacy Purposes Amount	92,392	70,758
Tier I Capital to Risk Weighted Assets For Capital Adequacy Purposes Ratio	4.00%	4.00%
Tier I Capital to Average Assets Actual Amount	331,400	309,415
Tier I Capital to Average Assets Actual Ratio	11.33%	10.34%
Tier I Capital to Average Assets For Capital Adequacy Purposes Amount	117,025	119,660
Tier I Capital to Average Assets For Capital Adequacy Purposes Ratio	4.00%	4.00%
Ameris Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital to Risk Weighted Assets Actual Amount	369,387	329,578
Total Capital to Risk Weighted Assets Actual Ratio	16.03%	18.65%
Total Capital to Risk Weighted Assets For Capital Adequacy Purposes Amount	184,349	141,374
Total Capital to Risk Weighted Assets For Capital Adequacy Purposes Ratio	8.00%	8.00%
Total Capital to Risk Weighted Assets To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	230,437	176,717
Total Capital to Risk Weighted Assets To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	10.00%	10.00%
Tier I Capital to Risk Weighted Assets Actual Amount	347,010	307,470
Tier I Capital to Risk Weighted Assets Actual Ratio	15.06%	17.40%
Tier I Capital to Risk Weighted Assets For Capital Adequacy Purposes Amount	92,175	70,687
Tier I Capital to Risk Weighted Assets For Capital Adequacy Purposes Ratio	4.00%	4.00%
Tier I Capital to Risk Weighted Assets To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	138,262	106,030
Tier I Capital to Risk Weighted Assets To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	6.00%	6.00%
Tier I Capital to Average Assets Actual Amount	347,010	307,470
Tier I Capital to Average Assets Actual Ratio	11.93%	10.30%
Tier I Capital to Average Assets For Capital Adequacy Purposes Amount	116,372	119,440
Tier I Capital to Average Assets For Capital Adequacy Purposes Ratio	4.00%	4.00%
Tier I Capital to Average Assets To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 145,465	$ 149,299
Tier I Capital to Average Assets To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	5.00%	5.00%