BUSINESS COMBINATIONS (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended
		Mar. 11, 2016	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Deposits:
Goodwill			$ 125,532	$ 121,512	$ 125,532
Consideration:
Company common stock issued			$ 0	$ 72,455
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
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 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	[1]	553
Allowance for loan losses		0
Loans, net		553
Other real estate owned	[2]	88
Premises and equipment	[3]	(119)
Intangible assets	[4]	(1,108)
Other assets	[5]	(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	[6]	(942)
Other investments		0
Loans	[7]	(15,746)
Allowance for loan losses	[8]	12,613
Loans, net		(3,133)
Other real estate owned	[9]	(1,035)
Premises and equipment		0
Intangible assets	[10]	5,566
Other assets	[11]	23,266
Total assets		23,722
Deposits:
Noninterest-bearing		0
Interest-bearing	[12]	421
Total deposits		421
Other borrowings	[13]	84
Other liabilities		0
Subordinated deferrable interest debentures	[14]	(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
Allowance for loan losses		0
Loans, net		401,638
Other real estate owned		1,926
Premises and equipment		4,679
Intangible assets		4,746
Other assets		33,883
Total assets		525,955
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 additional recording of fair value adjustment of the acquired loan portfolio.

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

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

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

[5] 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.

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

[7] 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.

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

[9] 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.

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

[11] 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.

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

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

[14] 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.