LOANS (Details 21) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	$ 21,658	$ 22,212	$ 22,254	$ 21,157	$ 22,377	$ 22,377
Provision for loan losses	986	888	1,669	4,711	4,760	5,648
Loans charged off	(1,267)	(2,488)	(2,355)	(6,459)	(7,072)	(9,560)
Recoveries of loans previously charged off	1,094	545	644	3,062	2,147	2,692
Balance	22,471	21,157	22,212	22,471	22,212	21,157
Loans individually evaluated for impairment							$ 4,699	$ 3,890	$ 4,105
Loans collectively evaluated for impairment							17,370	17,267	18,107
Loan pools collectively evaluated for impairment							420
Balance	22,471	21,157	22,212	21,157	22,377	21,157	22,471	21,157	22,212
Individually evaluated for impairment							24,827	27,649	33,616
Collectively evaluated for impairment							3,018,410	2,563,652	2,538,994
Acquired with deteriorated credit quality							205,927	244,098	263,462
Loan pools collectively evaluated for impairment							410,072	0	0
Ending balance							3,659,236	2,835,399	2,836,072
Commercial Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	1,426	2,581	2,185	2,004	1,823	1,823
Provision for loan losses	110	(200)	540	(66)	1,627	1,427
Loans charged off	(135)	(468)	(191)	(937)	(1,099)	(1,567)
Recoveries of loans previously charged off	117	91	47	517	230	321
Balance	1,518	2,004	2,581	1,518	2,581	2,004
Loans individually evaluated for impairment							521	375	611
Loans collectively evaluated for impairment							997	1,629	1,970
Loan pools collectively evaluated for impairment							0
Balance	1,518	2,004	2,581	2,004	1,823	2,004	1,518	2,004	2,581
Individually evaluated for impairment							1,286	490	1,549
Collectively evaluated for impairment							426,461	319,164	333,234
Acquired with deteriorated credit quality							0	0	0
Loan pools collectively evaluated for impairment							0
Ending balance							427,747	319,654	334,783
Real Estate Construction And Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	5,365	5,294	5,431	5,030	5,538	5,538
Provision for loan losses	643	(239)	63	1,030	(26)	(265)
Loans charged off	(105)	(74)	(296)	(465)	(518)	(592)
Recoveries of loans previously charged off	6	49	96	314	300	349
Balance	5,909	5,030	5,294	5,909	5,294	5,030
Loans individually evaluated for impairment							708	743	540
Loans collectively evaluated for impairment							5,201	4,287	4,754
Loan pools collectively evaluated for impairment							0
Balance	5,909	5,030	5,294	5,030	5,538	5,030	5,909	5,030	5,294
Individually evaluated for impairment							1,820	3,709	3,078
Collectively evaluated for impairment							218,978	157,798	151,237
Acquired with deteriorated credit quality							0	0	0
Loan pools collectively evaluated for impairment							0
Ending balance							220,798	161,507	154,315
Real Estate Commercial And Farmland [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	8,381	8,632	8,317	8,823	8,393	8,393
Provision for loan losses	43	1,133	1,237	743	2,311	3,444
Loans charged off	(184)	(1,033)	(953)	(1,358)	(2,255)	(3,288)
Recoveries of loans previously charged off	272	91	31	304	183	274
Balance	8,512	8,823	8,632	8,512	8,632	8,823
Loans individually evaluated for impairment							1,622	1,861	1,682
Loans collectively evaluated for impairment							6,890	6,962	6,950
Loan pools collectively evaluated for impairment							0
Balance	8,512	8,823	8,632	8,823	8,393	8,823	8,512	8,823	8,632
Individually evaluated for impairment							13,306	14,546	17,129
Collectively evaluated for impairment							1,054,522	892,978	865,031
Acquired with deteriorated credit quality							0	0	0
Loan pools collectively evaluated for impairment							0
Ending balance							1,067,828	907,524	882,160
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	4,805	5,407	5,166	4,129	6,034	6,034
Provision for loan losses	1,238	(981)	595	2,562	529	(452)
Loans charged off	(234)	(368)	(406)	(966)	(1,339)	(1,707)
Recoveries of loans previously charged off	54	71	52	138	183	254
Balance	5,863	4,129	5,407	5,863	5,407	4,129
Loans individually evaluated for impairment							1,848	911	1,272
Loans collectively evaluated for impairment							4,015	3,218	4,135
Loan pools collectively evaluated for impairment							0
Balance	5,863	4,129	5,407	4,129	6,034	4,129	5,863	4,129	5,407
Individually evaluated for impairment							8,415	8,904	11,860
Collectively evaluated for impairment							523,870	447,202	424,655
Acquired with deteriorated credit quality							0	0	0
Loan pools collectively evaluated for impairment							0
Ending balance							532,285	456,106	436,515
Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	1,681	298	1,155	1,171	589	589
Provision for loan losses	(1,386)	937	(862)	(721)	(370)	567
Loans charged off	(61)	(128)	(129)	(300)	(343)	(471)
Recoveries of loans previously charged off	33	64	134	117	422	486
Balance	267	1,171	298	267	298	1,171
Loans individually evaluated for impairment							0	0	0
Loans collectively evaluated for impairment							267	1,171	298
Loan pools collectively evaluated for impairment							0
Balance	267	1,171	298	1,171	589	1,171	267	1,171	298
Individually evaluated for impairment							0	0	0
Collectively evaluated for impairment							41,991	45,090	40,986
Acquired with deteriorated credit quality							0	0	0
Loan pools collectively evaluated for impairment							0
Ending balance							41,991	45,090	40,986
Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	0	0	0	0	0	0
Provision for loan losses	(193)	158	92	944	685	843
Loans charged off	(246)	(337)	(376)	(1,661)	(1,514)	(1,851)
Recoveries of loans previously charged off	439	179	284	717	829	1,008
Balance	0	0	0	0	0	0
Loans individually evaluated for impairment							0	0	0
Loans collectively evaluated for impairment							0	0	0
Loan pools collectively evaluated for impairment							0
Balance	0	0	0	0	0	0	0	0	0
Individually evaluated for impairment							0	0	0
Collectively evaluated for impairment							83,974	122,248	142,128
Acquired with deteriorated credit quality							107,047	149,031	171,461
Loan pools collectively evaluated for impairment							0
Ending balance							101,337	95,967	71,713
Covered Loans [Member] | Commercial Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance							11,794	14,385	11,356
Covered Loans [Member] | Real Estate Construction And Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance							29,596	27,289	13,268
Covered Loans [Member] | Real Estate Commercial And Farmland [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance							41,724	31,309	26,624
Covered Loans [Member] | Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance							18,097	22,860	20,331
Purchased Non Covered Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning Balance	0	0	0	0	0	0
Provision for loan losses	531	80	4	219	4	84
Loans charged off	(302)	(80)	(4)	(772)	(4)	(84)
Recoveries of loans previously charged off	173	0	0	955	0	0
Balance	402	0	0	402	0	0
Loans individually evaluated for impairment							0	0	0
Loans collectively evaluated for impairment							0	0	0
Loan pools collectively evaluated for impairment							402
Balance	$ 402	$ 0	$ 0	$ 0	$ 0	$ 0	402	0	0
Individually evaluated for impairment							0	0	0
Collectively evaluated for impairment							668,614	579,172	581,723
Acquired with deteriorated credit quality							98,880	95,067	92,001
Loan pools collectively evaluated for impairment							410,072
Ending balance							36,264	33,989	26,380
Purchased Non Covered Loans [Member] | Commercial Financial And Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance							1,137	1,366	438
Purchased Non Covered Loans [Member] | Real Estate Construction And Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance							9,211	5,161	3,794
Purchased Non Covered Loans [Member] | Real Estate Commercial And Farmland [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance							13,399	15,007	12,354
Purchased Non Covered Loans [Member] | Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance							$ 12,443	$ 12,283	$ 9,610