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, 2014	Dec. 31, 2013	Dec. 31, 2012
OPERATING ACTIVITIES
Net income	$ 38,723	$ 20,018	$ 14,435
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Stock-based compensation expense	2,057	1,041	1,044
(Increase) decrease in interest payable	(49)	199	(1,708)
Decrease in tax receivable	(7,221)	(1,420)	(5,941)
Provision for deferred taxes	6,516	3,543	2,525
Other operating activities	5,104	1,749	30,201
Net cash provided by (used in) operating activities	(5,596)	21,849	(7,828)
INVESTING ACTIVITIES
Net cash proceeds received from acquisitions	1,099	4,123	220,516
Net cash provided by investing activities	143,831	51,946	454,616
FINANCING ACTIVITIES
Repurchase of warrant			(2,670)
Purchase of treasury shares	(474)	(116)	(235)
Dividends paid preferred stock	(286)	(1,400)	(2,642)
Dividends paid common stock	(4,016)
Proceeds from other borrowings	118,963	175,000
Repayment of other borrowings	(257,060)	(177,741)	(30,334)
Repurchase of preferred stock	(28,000)		(24,000)
Proceeds from exercise of stock options	459	410	3
Net cash provided by (used in) financing activities	(123,154)	(91,096)	(432,060)
Net change in cash and due from banks	15,081	(17,301)	14,728
Cash and due from banks at beginning of period	62,955	80,256	65,528
Cash and due from banks at end of period	78,036	62,955	80,256
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid during the year for interest	14,667	9,938	16,782
Cash paid during the year for income taxes	19,281	16,925	2,563
Parent Company [Member]
OPERATING ACTIVITIES
Net income	38,723	20,018	14,435
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Stock-based compensation expense	2,058	1,041	1,044
Dividends received in excess of earnings of subsidiaries			12,772
Undistributed earnings of subsidiaries	(13,831)	(19,531)
(Increase) decrease in interest payable	(214)	(5,300)	(108)
Decrease in tax receivable	(256)	(813)	(786)
Provision for deferred taxes	(426)	39	14
Other operating activities	(1,558)	(2,686)	(388)
Total adjustments	(14,227)	(27,250)	12,548
Net cash provided by (used in) operating activities	24,496	(7,232)	26,983
INVESTING ACTIVITIES
Net cash proceeds received from acquisitions	144	249
Net cash provided by investing activities	144	249
FINANCING ACTIVITIES
Repurchase of warrant			(2,670)
Purchase of treasury shares	(474)	(116)	(235)
Dividends paid preferred stock	(286)	(1,400)	(2,642)
Dividends paid common stock	(4,016)
Proceeds from other borrowings	14,000	10,000
Repayment of other borrowings	(9,005)
Repurchase of preferred stock	(28,000)		(24,000)
Proceeds from exercise of stock options	459	410	3
Net cash provided by (used in) financing activities	(27,322)	8,894	(29,544)
Net change in cash and due from banks	(2,682)	1,911	(2,561)
Cash and due from banks at beginning of period	3,550	1,639	4,200
Cash and due from banks at end of period	868	3,550	1,639
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid during the year for interest	4,772	1,523	1,597
Cash paid during the year for income taxes	$ 0	$ 0	$ 0