BUSINESS COMBINATIONS (Details) - USD ($) $ / shares in Units, $ in Thousands				1 Months Ended	12 Months Ended
		Mar. 11, 2016	Jun. 12, 2015	May 22, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Deposits:
Goodwill					$ 125,532	$ 90,082	$ 63,547
Consideration:
Company common stock issued					$ 72,455	$ 0	$ 34,474
As Recorded by Ameris [Member]
Assets
Other assets		$ 33,883
Total assets		525,955
Bank Of America [Member]
Assets
Cash and cash equivalents			$ 630,220
Loans			4,363
Premises and equipment			10,348
Intangible assets			0
Other assets			126
Total assets			645,057
Deposits:
Noninterest-bearing			149,854
Interest-bearing			495,110
Total deposits			644,964
Other liabilities			93
Total liabilities			645,057
Net identifiable assets acquired over (under) liabilities assumed			0
Goodwill			0
Net assets acquired over (under) liabilities assumed			0
Consideration:
Cash exchanged for shares			20,000
Cash paid as deposit premium			20,002
Fair value of total consideration transferred			20,002
Bank Of America [Member] | Subsequent Fair Value Adjustments [Member]
Assets
Cash and cash equivalents			0
Loans	[1]		(364)
Premises and equipment	[2]		(755)
Intangible assets	[3]		985
Other assets			0
Total assets			(134)
Deposits:
Noninterest-bearing			0
Interest-bearing			0
Total deposits			0
Other liabilities			0
Total liabilities			0
Net identifiable assets acquired over (under) liabilities assumed			(134)
Goodwill			134
Net assets acquired over (under) liabilities assumed			0
Bank Of America [Member] | Initial Fair Value Adjustments [Member]
Assets
Cash and cash equivalents			0
Loans			0
Premises and equipment	[4]		1,060
Intangible assets	[5]		7,651
Other assets			0
Total assets			8,711
Deposits:
Noninterest-bearing			0
Interest-bearing	[6]		(215)
Total deposits			(215)
Other liabilities			0
Total liabilities			(215)
Net identifiable assets acquired over (under) liabilities assumed			8,926
Goodwill			11,076
Net assets acquired over (under) liabilities assumed			20,002
Bank Of America [Member] | As Recorded by Ameris [Member]
Assets
Cash and cash equivalents			630,220
Loans			3,999
Premises and equipment			10,653
Intangible assets			8,636
Other assets			126
Total assets			653,634
Deposits:
Noninterest-bearing			149,854
Interest-bearing			494,895
Total deposits			644,749
Other liabilities			93
Total liabilities			644,842
Net identifiable assets acquired over (under) liabilities assumed			8,792
Goodwill			11,210
Net assets acquired over (under) liabilities assumed			$ 20,002
Merchants and Southern Banks of Florida [Member]
Assets
Cash and cash equivalents				$ 7,527
Federal funds sold and interest-bearing balances				106,188
Investment securities				164,421
Other investments				872
Loans				199,955
Less allowance for loan losses				(3,354)
Loans, net				196,601
Other real estate owned				4,082
Premises and equipment				14,614
Intangible assets				0
Other assets				2,333
Total assets				496,638
Deposits:
Noninterest-bearing				121,708
Interest-bearing				286,112
Total deposits				407,820
Federal funds purchased and securities sold under agreements to repurchase				41,588
Other liabilities				2,151
Subordinated deferrable interest debentures				6,186
Total liabilities				457,745
Net identifiable assets acquired over (under) liabilities assumed				38,893
Goodwill				0
Net assets acquired over (under) liabilities assumed				38,893
Consideration:
Cash exchanged for shares				50,000
Fair value of total consideration transferred				50,000
Merchants and Southern Banks of Florida [Member] | Subsequent Fair Value Adjustments [Member]
Assets
Cash and cash equivalents				0
Federal funds sold and interest-bearing balances				0
Investment securities	[7]			(639)
Other investments	[8]			(253)
Loans	[9]			91
Less allowance for loan losses				0
Loans, net				91
Other real estate owned				0
Premises and equipment				0
Intangible assets	[10]			(634)
Other assets	[11]			(1,109)
Total assets				(2,544)
Deposits:
Noninterest-bearing				0
Interest-bearing	[12]			41,588
Total deposits				41,588
Federal funds purchased and securities sold under agreements to repurchase	[12]			(41,588)
Other liabilities				0
Subordinated deferrable interest debentures				0
Total liabilities				0
Net identifiable assets acquired over (under) liabilities assumed				(2,544)
Goodwill				2,544
Net assets acquired over (under) liabilities assumed				0
Merchants and Southern Banks of Florida [Member] | Initial Fair Value Adjustments [Member]
Assets
Cash and cash equivalents				0
Federal funds sold and interest-bearing balances				0
Investment securities	[13]			(553)
Other investments				0
Loans	[1]			(8,500)
Less allowance for loan losses	[14]			3,354
Loans, net				(5,146)
Other real estate owned	[15]			(1,115)
Premises and equipment	[16]			(3,680)
Intangible assets	[5]			4,577
Other assets	[17]			2,335
Total assets				(3,582)
Deposits:
Noninterest-bearing				0
Interest-bearing				0
Total deposits				0
Federal funds purchased and securities sold under agreements to repurchase				0
Other liabilities	[18]			81
Subordinated deferrable interest debentures	[19]			(2,680)
Total liabilities				(2,599)
Net identifiable assets acquired over (under) liabilities assumed				(983)
Goodwill				12,090
Net assets acquired over (under) liabilities assumed				11,107
Merchants and Southern Banks of Florida [Member] | As Recorded by Ameris [Member]
Assets
Cash and cash equivalents				7,527
Federal funds sold and interest-bearing balances				106,188
Investment securities				163,229
Other investments				619
Loans				191,546
Less allowance for loan losses				0
Loans, net				191,546
Other real estate owned				2,967
Premises and equipment				10,934
Intangible assets				3,943
Other assets				3,559
Total assets				490,512
Deposits:
Noninterest-bearing				121,708
Interest-bearing				327,700
Total deposits				449,408
Federal funds purchased and securities sold under agreements to repurchase				0
Other liabilities				2,232
Subordinated deferrable interest debentures				3,506
Total liabilities				455,146
Net identifiable assets acquired over (under) liabilities assumed				35,366
Goodwill				14,634
Net assets acquired over (under) liabilities assumed				$ 50,000
Jacksonville Bancorp, Inc [Member]
Assets
Cash and cash equivalents		9,704
Federal funds sold and interest-bearing balances		7,027
Investment securities		60,836
Other investments		2,458
Loans		416,831
Less allowance for loan losses		(12,613)
Loans, net		404,218
Other real estate owned		2,873
Premises and equipment		4,798
Intangible assets		288
Other assets		14,141
Total assets		506,343
Deposits:
Noninterest-bearing		123,399
Interest-bearing		277,539
Total deposits		400,938
Other borrowings		48,350
Other liabilities		2,354
Subordinated deferrable interest debentures		16,294
Total liabilities		467,936
Net identifiable assets acquired over (under) liabilities assumed		38,407
Goodwill		0
Net assets acquired over (under) liabilities assumed		$ 38,407
Consideration:
Ameris Bancorp common shares issued		2,549,469
Price per share of the Company's common stock		$ 28.42
Company common stock issued		$ 72,455
Cash exchanged for shares		23,937
Fair value of total consideration transferred		96,392
Jacksonville Bancorp, Inc [Member] | Subsequent Fair Value Adjustments [Member]
Assets
Cash and cash equivalents		0
Federal funds sold and interest-bearing balances		0
Investment securities		0
Other investments		0
Loans	[20]	553
Less allowance for loan losses		0
Loans, net		553
Other real estate owned	[21]	88
Premises and equipment	[22]	(119)
Intangible assets		(1,108)
Other assets	[11]	(3,524)
Total assets		(4,110)
Deposits:
Noninterest-bearing		0
Interest-bearing		0
Total deposits		0
Other borrowings		0
Other liabilities		0
Subordinated deferrable interest debentures		0
Total liabilities		0
Net identifiable assets acquired over (under) liabilities assumed		(4,110)
Goodwill		4,110
Net assets acquired over (under) liabilities assumed		0
Jacksonville Bancorp, Inc [Member] | Initial Fair Value Adjustments [Member]
Assets
Cash and cash equivalents		0
Federal funds sold and interest-bearing balances		0
Investment securities	[23]	(942)
Other investments		0
Loans	[24]	(15,746)
Less allowance for loan losses	[25]	12,613
Loans, net		(3,133)
Other real estate owned	[26]	(1,035)
Premises and equipment		0
Intangible assets		5,566
Other assets	[27]	23,266
Total assets		23,722
Deposits:
Noninterest-bearing		0
Interest-bearing		421
Total deposits		421
Other borrowings	[28]	84
Other liabilities		0
Subordinated deferrable interest debentures	[29]	(3,393)
Total liabilities		(2,888)
Net identifiable assets acquired over (under) liabilities assumed		26,610
Goodwill		31,375
Net assets acquired over (under) liabilities assumed		57,985
Jacksonville Bancorp, Inc [Member] | As Recorded by Ameris [Member]
Assets
Cash and cash equivalents		9,704
Federal funds sold and interest-bearing balances		7,027
Investment securities		59,894
Other investments		2,458
Loans		401,638
Less allowance for loan losses		0
Loans, net		401,638
Other real estate owned		1,926
Premises and equipment		4,679
Intangible assets		4,746
Deposits:
Noninterest-bearing		123,399
Interest-bearing		277,960
Total deposits		401,359
Other borrowings		48,434
Other liabilities		2,354
Subordinated deferrable interest debentures		12,901
Total liabilities		465,048
Net identifiable assets acquired over (under) liabilities assumed		60,907
Goodwill		35,485
Net assets acquired over (under) liabilities assumed		$ 96,392

[1] Adjustment reflects the fair value adjustments based on the Company’s evaluation of the acquired loan portfolio.

[2] Adjustment reflects additional recording of fair value adjustment of the premise and equipment.

[3] Adjustment reflects additional recording of core deposit intangible on the acquired core deposit accounts.

[4] Adjustment reflects the fair value adjustments of the premise and equipment as of the acquisition date.

[5] Adjustment reflects the recording of core deposit intangible on the acquired core deposit accounts.

[6] Adjustment reflects the fair value adjustments based on the Company’s evaluation of the acquired deposits.

[7] Adjustment reflects additional fair value adjustments of the investment securities available for sale portfolio as of the acquisition date.

[8] Adjustment reflects the fair value adjustments of other investments as of the acquisition date.

[9] Adjustment reflects additional recording of fair value adjustments of the acquired loan portfolio.

[10] Adjustment reflects adjustment to the core deposit intangible on the acquired core deposit accounts.

[11] Adjustment reflects additional recording of deferred taxes on the difference in the carrying values of acquired assets and assumed liabilities for financial reporting purposes and their basis for federal income tax purposes.

[12] Subsequent to acquisition, the acquired securities sold under agreements to repurchase were converted to deposit accounts and are no longer reported as securities sold under agreements to repurchase on the consolidated balance sheet as of December 31, 2015.

[13] Adjustment reflects the fair value adjustments of the investment securities available for sale portfolio as of the acquisition date.

[14] Adjustment reflects the elimination of Merchants’ allowance for loan losses.

[15] Adjustment reflects the fair value adjustment based on the Company’s evaluation of the acquired OREO portfolio.

[16] Adjustment reflects the fair value adjustment based on the Company’s evaluation of the acquired premises.

[17] Adjustment reflects the deferred taxes on the difference in the carrying values of acquired assets and assumed liabilities for financial reporting purposes and their basis for federal income tax purposes.

[18] Adjustment reflects the fair value adjustments based on the Company’s evaluation of interest rate swap liabilities.

[19] Adjustment reflects the fair value adjustment to the subordinated deferrable interest debentures at the acquisition date.

[20] Adjustment reflects additional recording of fair value adjustment of the acquired loan portfolio.

[21] Adjustment reflects additional recording of fair value adjustment of other real estate owned.

[22] Adjustment reflects recording of fair value adjustment of the premises and equipment.

[23] Adjustment reflects the fair value adjustments of the portfolio of securities available for sale as of the acquisition date.

[24] Adjustment reflects the fair value adjustments based on the Company’s evaluation of the acquired loan portfolio, net of the reversal of JAXB remaining fair value adjustments from their prior acquisitions.

[25] Adjustment reflects the elimination of JAXB’s allowance for loan losses.

[26] Adjustment reflects the fair value adjustment based on the Company’s evaluation of the acquired OREO portfolio, which is based largely on contracted sale prices.

[27] Adjustment reflects the deferred taxes on the difference in the carrying values of acquired assets and assumed liabilities for financial reporting purposes and their basis for federal income tax purposes and the reversal of JAXB valuation allowance established on their deferred tax assets.

[28] Adjustment reflects the fair value adjustments based on the Company’s evaluation of the liability for other borrowings.

[29] Adjustment reflects the fair value adjustment to the subordinated deferrable interest debentures at the acquisition date, net of the reversal of JAXB remaining fair value adjustments from their prior acquisitions.