Condensed Financial Information of Ameris Bancorp (Parent Company Only) - Condensed Statements of Income (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income
Gain on sale of securities	$ 171	$ 322	$ 238
Total interest income	126,322	129,479	141,071
Expense
Interest	10,137	15,074	27,547
Other expense	38,416	39,476	38,305
Total noninterest expense	121,945	119,470	101,953
Earnings (loss) before income tax benefit and dividends received in excess of earnings of subsidiaries and equity in undistributed income (loss) of subsidiaries	29,303	21,720	31,649
Applicable income tax benefit/(expense)	(9,285)	(7,285)	(10,556)
Net income	20,018	14,435	21,093
Preferred stock dividend	1,738	3,577	3,241
Net income available to common shareholders	18,280	10,858	17,852
Parent Company [Member]
Income
Dividends from subsidiaries	2,200	29,000
Gain on sale of securities		214
Other income	26	106	124
Total interest income	2,226	29,320	124
Expense
Interest	1,527	1,489	1,417
Other expense	1,133	1,545	1,120
Total noninterest expense	2,660	3,034	2,537
Earnings (loss) before income tax benefit and dividends received in excess of earnings of subsidiaries and equity in undistributed income (loss) of subsidiaries	(434)	26,286	(2,413)
Applicable income tax benefit/(expense)	921	921	785
Earnings (loss) before dividends received in excess of earnings of subsidiaries and equity in undistributed income of subsidiaries	487	27,207	(1,628)
Dividends received in excess of earnings of subsidiaries		(12,772)
Equity in undistributed income of subsidiaries	19,531		22,721
Net income	20,018	14,435	21,093
Preferred stock dividend	1,738	3,577	3,241
Net income available to common shareholders	$ 18,280	$ 10,858	$ 17,852