Condensed Financial Information of Ameris Bancorp (Parent Company Only) - Condensed Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Assets
Cash and due from banks	$ 62,955	$ 80,256	$ 65,528	$ 74,326
Other assets	51,663	24,409
Total assets	3,667,649	3,019,052
Liabilities
Other liabilities	18,165	22,983
Other borrowings	194,572
Subordinated deferrable interest debentures	55,466	42,269
Total liabilities	3,350,950	2,740,035
Stockholders' equity	316,699	279,017	293,770
Total liabilities and stockholders' equity	3,667,649	3,019,052
Parent Company [Member]
Assets
Cash and due from banks	3,550	1,639	4,200	8,763
Investment in subsidiaries	386,377	319,364
Other assets	6,824	4,440
Total assets	396,751	325,443
Liabilities
Other liabilities	14	4,157
Other borrowings	24,572
Subordinated deferrable interest debentures	55,466	42,269
Total liabilities	80,052	46,426
Stockholders' equity	316,699	279,017
Total liabilities and stockholders' equity	$ 396,751	$ 325,443