Condensed Financial Information of Ameris Bancorp (Parent Company Only) - Condensed Statements of Cash Flows (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
OPERATING ACTIVITIES
Net income	$ 20,018	$ 14,435	$ 21,093
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Stock-based compensation expense	1,041	1,044	785
(Increase) decrease in interest payable	199	(1,708)	(1,608)
Decrease in tax receivable	(1,420)	(5,941)	11,077
Provision for deferred taxes	3,543	2,525	8,050
Total adjustments	13,619	17,804	25,073
Net cash provided by (used in) operating activities	33,637	32,239	46,166
INVESTING ACTIVITIES
Net cash proceeds received from acquisitions	4,123	220,516	38,017
Net cash provided by investing activities	40,158	414,549	278,505
FINANCING ACTIVITIES
Repurchase of warrant		(2,670)
Purchase of treasury shares	(116)	(235)
Dividends paid preferred stock	(1,400)	(2,642)	(2,635)
Proceeds from other borrowings	175,000
Proceeds from exercise of stock options	410	3	28
Net cash provided by (used in) financing activities	(91,096)	(432,060)	(333,469)
Net change in cash and due from banks	(17,301)	14,728	(8,798)
Cash and due from banks at beginning of period	80,256	65,528	74,326
Cash and due from banks at end of period	62,955	80,256	65,528
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid during the year for interest	9,938	16,782	29,155
Cash paid during the year for income taxes	16,925	2,563	(1,109)
Parent Company [Member]
OPERATING ACTIVITIES
Net income	20,018	14,435	21,093
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Stock-based compensation expense	1,041	1,044	785
Dividends received in excess of earnings of subsidiaries		12,772
Undistributed earnings of subsidiaries	(19,531)		(22,721)
(Increase) decrease in interest payable	(5,300)	(108)	54
Decrease in tax receivable	(813)	(786)	(247)
Provision for deferred taxes	39	14	(390)
Other operating activities	(2,686)	(388)	(530)
Total adjustments	(27,250)	12,548	(23,049)
Net cash provided by (used in) operating activities	(7,232)	26,983	(1,956)
INVESTING ACTIVITIES
Net cash proceeds received from acquisitions	249
Net cash provided by investing activities	249
FINANCING ACTIVITIES
Repurchase of warrant		(2,670)
Purchase of treasury shares	(116)	(235)
Dividends paid preferred stock	(1,400)	(2,642)	(2,635)
Proceeds from other borrowings	10,000
Repurchase of preferred stock		(24,000)
Proceeds from exercise of stock options	410	3	28
Net cash provided by (used in) financing activities	8,894	(29,544)	(2,607)
Net change in cash and due from banks	1,911	(2,561)	(4,563)
Cash and due from banks at beginning of period	1,639	4,200	8,763
Cash and due from banks at end of period	3,550	1,639	4,200
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid during the year for interest	1,523	1,597	1,363
Cash paid during the year for income taxes