ASSETS ACQUIRED IN FDIC-ASSISTED ACQUISITIONS (Details 1) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Covered Assets [Line Items]
Covered loans	$ 139,823	$ 265,488	$ 148,573
Less: Fair value adjustments	(9,544)	19,743	11,044
Total covered loans	130,279	245,745	137,529
OREO	4,257	18,531	5,938
Less: Fair value adjustments	(493)	2,442	927
Total covered OREO	3,764	16,089	5,011
Total covered assets	134,043	261,834	142,540
FDIC loss-share receivable (payable)	1,197	23,312	6,301	$ 31,351
American United Bank [Member]
Covered Assets [Line Items]
Covered loans	0	0	0
Less: Fair value adjustments	0	0	0
Total covered loans	0	0	0
OREO	0	0	0
Less: Fair value adjustments	0	0	0
Total covered OREO	0	0	0
Total covered assets	0	0	0
FDIC loss-share receivable (payable)	261	248	111
United Security Bank [Member]
Covered Assets [Line Items]
Covered loans	3,561	4,031	3,639
Less: Fair value adjustments	(14)	19	16
Total covered loans	3,547	4,012	3,623
OREO	0	165	165
Less: Fair value adjustments	0	0	0
Total covered OREO	0	165	165
Total covered assets	3,547	4,177	3,788
FDIC loss-share receivable (payable)	(1,590)	(1,216)	(1,424)
Satilla Community Bank [Member]
Covered Assets [Line Items]
Covered loans	5,187	23,803	5,228
Less: Fair value adjustments	(87)	512	124
Total covered loans	5,100	23,291	5,104
OREO	0	2,474	0
Less: Fair value adjustments	0	389	0
Total covered OREO	0	2,085	0
Total covered assets	5,100	25,376	5,104
FDIC loss-share receivable (payable)	138	2,093	149
First Bank of Jacksonville [Member]
Covered Assets [Line Items]
Covered loans	4,498	19,409	4,782
Less: Fair value adjustments	(541)	1,539	562
Total covered loans	3,957	17,870	4,220
OREO	68	427	41
Less: Fair value adjustments	0	56	0
Total covered OREO	68	371	41
Total covered assets	4,025	18,241	4,261
FDIC loss-share receivable (payable)	(20)	1,366	252
Darby Bank and Trust [Member]
Covered Assets [Line Items]
Covered loans	15,147	53,832	15,934
Less: Fair value adjustments	(1,000)	4,740	1,131
Total covered loans	14,147	49,092	14,803
OREO	0	5,716	0
Less: Fair value adjustments	0	381	0
Total covered OREO	0	5,335	0
Total covered assets	14,147	54,427	14,803
FDIC loss-share receivable (payable)	(3,451)	3,576	(1,084)
Tifton Banking Company [Member]
Covered Assets [Line Items]
Covered loans	2,027	21,068	2,159
Less: Fair value adjustments	(10)	570	11
Total covered loans	2,017	20,498	2,148
OREO	0	1,698	0
Less: Fair value adjustments	0	162	0
Total covered OREO	0	1,536	0
Total covered assets	2,017	22,034	2,148
FDIC loss-share receivable (payable)	94	1,545	1,446
High Trust Bank [Member]
Covered Assets [Line Items]
Covered loans	43,996	48,384	44,405
Less: Fair value adjustments	(3,750)	4,331	3,881
Total covered loans	40,246	44,053	40,524
OREO	1,451	2,885	2,433
Less: Fair value adjustments	(328)	938	643
Total covered OREO	1,123	1,947	1,790
Total covered assets	41,369	46,000	42,314
FDIC loss-share receivable (payable)	3,079	7,069	3,875
One Georgia Bank [Member]
Covered Assets [Line Items]
Covered loans	22,512	38,699	27,561
Less: Fair value adjustments	(1,249)	2,409	1,900
Total covered loans	21,263	36,290	25,661
OREO	136	1,435	160
Less: Fair value adjustments	0	39	0
Total covered OREO	136	1,396	160
Total covered assets	21,399	37,686	25,821
FDIC loss-share receivable (payable)	556	2,748	913
Central Bank of Georgia [Member]
Covered Assets [Line Items]
Covered loans	42,895	56,262	44,865
Less: Fair value adjustments	(2,893)	5,623	3,419
Total covered loans	40,002	50,639	41,446
OREO	2,602	3,731	3,139
Less: Fair value adjustments	(165)	477	284
Total covered OREO	2,437	3,254	2,855
Total covered assets	42,439	53,893	44,301
FDIC loss-share receivable (payable)	$ 2,130	$ 5,883	$ 2,063