LOANS (Details 14) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Mar. 31, 2017		Dec. 31, 2016		Mar. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance, Allowance	$ 23,920	$ 21,062	$ 21,062
Provision for loan losses	1,836	681	4,091
Loans charged off	(1,102)	(1,814)	(6,327)
Recoveries of loans previously charged off	596	1,553	5,094
Ending balance, Allowance	25,250	21,482	23,920
Loans individually evaluated for impairment, Allowance				$ 7,664	[1]	$ 6,407	[2]	$ 5,142	[3]
Loans collectively evaluated for impairment, Allowance				17,586		17,513		16,340
Balance, Allowance	23,920	21,062	23,920	25,250		23,920		21,482
Individually evaluated for impairment, Loan				62,789	[1]	60,421	[2]	62,454	[3]
Collectively evaluated for impairment, Loan				5,123,609		5,055,371		4,168,502
Acquired with deteriorated credit quality, Loan				135,116		148,534		213,983
Ending balance, Loan				5,321,514		5,264,326		4,444,939
Commercial Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance, Allowance	2,192	1,144	1,144
Provision for loan losses	641	788	2,647
Loans charged off	(104)	(406)	(1,999)
Recoveries of loans previously charged off	69	73	400
Ending balance, Allowance	2,798	1,599	2,192
Loans individually evaluated for impairment, Allowance				626	[1]	120	[2]	400	[3]
Loans collectively evaluated for impairment, Allowance				2,172		2,072		1,199
Balance, Allowance	2,192	1,144	2,192	2,798		2,192		1,599
Individually evaluated for impairment, Loan				1,937	[1]	501	[2]	799	[3]
Collectively evaluated for impairment, Loan				1,059,662		966,637		433,274
Acquired with deteriorated credit quality, Loan				0		0		0
Ending balance, Loan				1,061,599		967,138		434,073
Real Estate Construction And Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance, Allowance	2,990	5,009	5,009
Provision for loan losses	640	(1,051)	(1,921)
Loans charged off	(53)	(155)	(588)
Recoveries of loans previously charged off	20	122	490
Ending balance, Allowance	3,597	3,925	2,990
Loans individually evaluated for impairment, Allowance				354	[1]	266	[2]	733	[3]
Loans collectively evaluated for impairment, Allowance				3,243		2,724		3,192
Balance, Allowance	2,990	5,009	2,990	3,597		2,990		3,925
Individually evaluated for impairment, Loan				843	[1]	659	[2]	1,604	[3]
Collectively evaluated for impairment, Loan				414,186		362,386		263,216
Acquired with deteriorated credit quality, Loan				0		0		0
Ending balance, Loan				415,029		363,045		264,820
Real estate - commercial & farmland [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance, Allowance	7,662	7,994	7,994
Provision for loan losses	217	(669)	107
Loans charged off	(9)	(347)	(708)
Recoveries of loans previously charged off	9	121	269
Ending balance, Allowance	7,879	7,099	7,662
Loans individually evaluated for impairment, Allowance				1,574	[1]	1,502	[2]	873	[3]
Loans collectively evaluated for impairment, Allowance				6,305		6,160		6,226
Balance, Allowance	7,662	7,994	7,662	7,879		7,662		7,099
Individually evaluated for impairment, Loan				11,260	[1]	12,423	[2]	12,050	[3]
Collectively evaluated for impairment, Loan				1,446,850		1,393,796		1,142,837
Acquired with deteriorated credit quality, Loan				0		0		0
Ending balance, Loan				1,458,110		1,406,219		1,154,887
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance, Allowance	6,786	4,760	4,760
Provision for loan losses	(791)	25	2,757
Loans charged off	(216)	(468)	(1,122)
Recoveries of loans previously charged off	61	314	391
Ending balance, Allowance	5,840	4,631	6,786
Loans individually evaluated for impairment, Allowance				2,538	[1]	2,893	[2]	2,153	[3]
Loans collectively evaluated for impairment, Allowance				3,302		3,893		2,478
Balance, Allowance	6,786	4,760	6,786	5,840		6,786		4,631
Individually evaluated for impairment, Loan				9,630	[1]	12,697	[2]	9,540	[3]
Collectively evaluated for impairment, Loan				717,165		768,321		619,598
Acquired with deteriorated credit quality, Loan				0		0		0
Ending balance, Loan				726,795		781,018		629,138
Consumer installment loans and Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance, Allowance	827	1,574	1,574
Provision for loan losses	174	399	(523)
Loans charged off	(164)	(59)	(351)
Recoveries of loans previously charged off	17	25	127
Ending balance, Allowance	854	1,939	827
Loans individually evaluated for impairment, Allowance				0	[1]	0	[2]	0	[3]
Loans collectively evaluated for impairment, Allowance				854		827		1,939
Balance, Allowance	827	1,574	827	854		827		1,939
Individually evaluated for impairment, Loan				0	[1]	0	[2]	0	[3]
Collectively evaluated for impairment, Loan				123,947		109,401		45,089
Acquired with deteriorated credit quality, Loan				0		0		0
Ending balance, Loan				123,947		109,401		45,089
Purchased Loan Pools [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance, Allowance	1,837	581	581
Provision for loan losses	249	725	1,256
Loans charged off	0	0	0
Recoveries of loans previously charged off	0	0	0
Ending balance, Allowance	2,086	1,306	1,837
Loans individually evaluated for impairment, Allowance				376	[1]	0	[2]	0	[3]
Loans collectively evaluated for impairment, Allowance				1,710		1,837		1,306
Balance, Allowance	1,837	581	1,837	2,086		1,837		1,306
Individually evaluated for impairment, Loan				3,446	[1]	0	[2]	0	[3]
Collectively evaluated for impairment, Loan				525,653		568,314		656,734
Acquired with deteriorated credit quality, Loan				0		0		0
Ending balance, Loan				529,099		568,314		656,734
Purchased Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance, Allowance	1,626	0	0
Provision for loan losses	706	464	(232)
Loans charged off	(556)	(379)	(1,559)
Recoveries of loans previously charged off	420	898	3,417
Ending balance, Allowance	2,196	983	1,626
Loans individually evaluated for impairment, Allowance				2,196	[1]	1,626	[2]	983	[3]
Loans collectively evaluated for impairment, Allowance				0		0		0
Balance, Allowance	$ 1,626	$ 0	$ 1,626	2,196		1,626		983
Individually evaluated for impairment, Loan				35,673	[1]	34,141	[2]	38,461	[3]
Collectively evaluated for impairment, Loan				836,146		886,516		1,007,754
Acquired with deteriorated credit quality, Loan				135,116		148,534		213,983
Ending balance, Loan				$ 1,006,935		$ 1,069,191		$ 1,260,198

[1] At March 31, 2017, loans individually evaluated for impairment includes all nonaccrual loans greater than $100,000 and all troubled debt restructurings greater than $100,000, including all troubled debt restructurings and not only those currently classified as troubled debt restructurings.

[2] At December 31, 2016, loans individually evaluated for impairment includes all nonaccrual loans greater than $100,000 and all troubled debt restructurings greater than $100,000, including all troubled debt restructurings and not only those currently classified as troubled debt restructurings.

[3] At March 31, 2016, loans individually evaluated for impairment includes all nonaccrual loans greater than $100,000 and all troubled debt restructurings greater than $100,000, including all troubled debt restructurings and not only those currently classified as troubled debt restructurings.