LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 20) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Allowance				$ 21,062				$ 21,157	$ 21,062	$ 21,157	$ 22,377
Provision for loan losses	$ 1,710	$ 811	$ 889	681	$ 553	$ 986	$ 2,656	1,069	4,091	5,264	5,648
Loans charged off									(6,327)	(9,133)	(9,560)
Recoveries of loans previously charged off									5,094	3,774	2,692
Balance, Allowance	23,920				21,062				23,920	21,062	21,157
Loans individually evaluated for impairment, Allowance												$ 6,407	[1]	$ 4,131	[2]	$ 3,890	[3]
Loans collectively evaluated for impairment, Allowance												17,513		16,931		17,267
Balance, Allowance	23,920			21,062	21,062			21,157	23,920	21,062	21,157	23,920		21,062		21,157
Individually evaluated for impairment, Loan												60,421	[1]	68,701	[2]	27,649	[3]
Collectively evaluated for impairment, Loan												5,055,371		3,697,437		2,563,652
Acquired with deteriorated credit quality, Loan												148,534		142,785		244,098
Ending balance, Loan												1,011,031		771,554		2,835,399
Commercial Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Allowance				1,144				2,004	1,144	2,004	1,823
Provision for loan losses									2,647	(73)	1,427
Loans charged off									(1,999)	(1,438)	(1,567)
Recoveries of loans previously charged off									400	651	321
Balance, Allowance	2,192				1,144				2,192	1,144	2,004
Loans individually evaluated for impairment, Allowance												120	[1]	126	[2]	375	[3]
Loans collectively evaluated for impairment, Allowance												2,072		1,018		1,629
Balance, Allowance	2,192			1,144	1,144			2,004	2,192	1,144	2,004	2,192		1,144		2,004
Individually evaluated for impairment, Loan												501	[1]	323	[2]	490	[3]
Collectively evaluated for impairment, Loan												966,637		449,300		319,164
Acquired with deteriorated credit quality, Loan												0		0		0
Ending balance, Loan												967,138		449,623		319,654
Real Estate Construction And Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Allowance				5,009				5,030	5,009	5,030	5,538
Provision for loan losses									(1,921)	278	(265)
Loans charged off									(588)	(622)	(592)
Recoveries of loans previously charged off									490	323	349
Balance, Allowance	2,990				5,009				2,990	5,009	5,030
Loans individually evaluated for impairment, Allowance												266	[1]	759	[2]	743	[3]
Loans collectively evaluated for impairment, Allowance												2,724		4,250		4,287
Balance, Allowance	2,990			5,009	5,009			5,030	2,990	5,009	5,030	2,990		5,009		5,030
Individually evaluated for impairment, Loan												659	[1]	1,958	[2]	3,709	[3]
Collectively evaluated for impairment, Loan												362,386		242,735		157,798
Acquired with deteriorated credit quality, Loan												0		0		0
Ending balance, Loan												363,045		244,693		161,507
Real estate - commercial & farmland [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Allowance				7,994				8,823	7,994	8,823	8,393
Provision for loan losses									107	1,221	3,444
Loans charged off									(708)	(2,367)	(3,288)
Recoveries of loans previously charged off									269	317	274
Balance, Allowance	7,662				7,994				7,662	7,994	8,823
Loans individually evaluated for impairment, Allowance												1,502	[1]	1,074	[2]	1,861	[3]
Loans collectively evaluated for impairment, Allowance												6,160		6,920		6,962
Balance, Allowance	7,662			7,994	7,994			8,823	7,662	7,994	8,823	7,662		7,994		8,823
Individually evaluated for impairment, Loan												12,423	[1]	11,877	[2]	14,546	[3]
Collectively evaluated for impairment, Loan												1,393,796		1,093,114		892,978
Acquired with deteriorated credit quality, Loan												0		0		0
Ending balance, Loan												1,406,219		1,104,991		907,524
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Allowance				4,760				4,129	4,760	4,129	6,034
Provision for loan losses									2,757	2,067	(452)
Loans charged off									(1,122)	(1,587)	(1,707)
Recoveries of loans previously charged off									391	151	254
Balance, Allowance	6,786				4,760				6,786	4,760	4,129
Loans individually evaluated for impairment, Allowance												2,893	[1]	2,172	[2]	911	[3]
Loans collectively evaluated for impairment, Allowance												3,893		2,588		3,218
Balance, Allowance	6,786			4,760	4,760			4,129	6,786	4,760	4,129	6,786		4,760		4,129
Individually evaluated for impairment, Loan												12,697	[1]	9,554	[2]	8,904	[3]
Collectively evaluated for impairment, Loan												768,321		560,876		447,202
Acquired with deteriorated credit quality, Loan												0		0		0
Ending balance, Loan												781,018		570,430		456,106
Consumer installment loans and Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Allowance				1,574				1,171	1,574	1,171	589
Provision for loan losses									(523)	676	567
Loans charged off									(351)	(410)	(471)
Recoveries of loans previously charged off									127	137	486
Balance, Allowance	827				1,574				827	1,574	1,171
Loans individually evaluated for impairment, Allowance												0	[1]	0	[2]	0	[3]
Loans collectively evaluated for impairment, Allowance												827		1,574		1,171
Balance, Allowance	827			1,574	1,574			1,171	827	1,574	1,171	827		1,574		1,171
Individually evaluated for impairment, Loan												0	[1]	0	[2]	0	[3]
Collectively evaluated for impairment, Loan												109,401		37,140		45,090
Acquired with deteriorated credit quality, Loan												0		0		0
Ending balance, Loan												109,401		37,140		45,090
Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Allowance				0				0	0	0	0
Provision for loan losses									(957)	751	843
Loans charged off									(493)	(1,759)	(1,851)
Recoveries of loans previously charged off									1,694	1,008	1,008
Balance, Allowance	244				0				244	0	0
Loans individually evaluated for impairment, Allowance												244	[1]	0	[2]	0	[3]
Loans collectively evaluated for impairment, Allowance												0		0		0
Balance, Allowance	244			0	0			0	244	0	0	244		0		0
Individually evaluated for impairment, Loan												11,890	[1]	22,317	[2]	0	[3]
Collectively evaluated for impairment, Loan												26,150		52,451		122,248
Acquired with deteriorated credit quality, Loan												20,120		62,761		149,031
Ending balance, Loan												58,160		137,529		271,279
Purchased Non Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, Allowance				581				0	581	0	0
Provision for loan losses									1,981	344	84
Loans charged off									(1,066)	(950)	(84)
Recoveries of loans previously charged off									1,723	1,187	0
Balance, Allowance	3,219				581				3,219	581	0
Loans individually evaluated for impairment, Allowance												1,382	[1]	0	[2]	0	[3]
Loans collectively evaluated for impairment, Allowance												1,837		581		0
Balance, Allowance	$ 3,219			$ 581	$ 581			$ 0	$ 3,219	$ 581	$ 0	3,219		581		0
Individually evaluated for impairment, Loan												22,251	[1]	22,672	[2]	0	[3]
Collectively evaluated for impairment, Loan												1,428,680		1,261,821		579,172
Acquired with deteriorated credit quality, Loan												128,414		80,024		95,067
Ending balance, Loan												$ 1,579,345		$ 1,364,517		$ 674,239

[1] 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.

[2] At December 31, 2015, loans individually evaluated for impairment includes all nonaccrual loans greater than $200,000 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 December 31, 2014, loans individually evaluated for impairment includes all nonaccrual loans greater than $200,000 and all troubled debt restructurings greater than $100,000, including all troubled debt restructurings and not only those currently classified as troubled debt restructurings.