LOANS (Details 12) - 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
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Contractual Principal Balance	$ 3,659,236	$ 2,835,399	$ 2,836,072	$ 3,659,236	$ 2,836,072	$ 2,835,399
Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Contractual Principal Balance	101,337	95,967	71,713	101,337	71,713	95,967
Recorded Investment With No Allowance	49,660	58,031	62,040	49,660	62,040	58,031
Recorded Investment With Allowance	0	0	0	0	0	0
Total Recorded Investment	49,660	58,031	62,040	49,660	62,040	58,031
Related Allowance	0	0	0	0	0	0
Average Recorded Investment	50,470	60,036	64,641	54,514	75,808	72,253
Commercial Financial And Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Contractual Principal Balance	427,747	319,654	334,783	427,747	334,783	319,654
Commercial Financial And Agricultural [Member] | Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Contractual Principal Balance	11,794	14,385	11,356	11,794	11,356	14,385
Recorded Investment With No Allowance	7,918	8,582	8,467	7,918	8,467	8,582
Recorded Investment With Allowance	0	0	0	0	0	0
Total Recorded Investment	7,918	8,582	8,467	7,918	8,467	8,582
Related Allowance	0	0	0	0	0	0
Average Recorded Investment	8,625	8,525	10,367	8,560	9,511	9,325
Real Estate Construction And Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Contractual Principal Balance	220,798	161,507	154,315	220,798	154,315	161,507
Real Estate Construction And Development [Member] | Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Contractual Principal Balance	29,596	27,289	13,268	29,596	13,268	27,289
Recorded Investment With No Allowance	5,780	10,638	11,920	5,780	11,920	10,638
Recorded Investment With Allowance	0	0	0	0	0	0
Total Recorded Investment	5,780	10,638	11,920	5,780	11,920	10,638
Related Allowance	0	0	0	0	0	0
Average Recorded Investment	6,166	11,279	11,484	8,013	14,760	13,935
Commercial And Farmland [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Contractual Principal Balance	1,067,828	907,524	882,160	1,067,828	882,160	907,524
Commercial And Farmland [Member] | Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Contractual Principal Balance	41,724	31,309	26,624	41,724	26,624	31,309
Recorded Investment With No Allowance	21,265	20,663	23,118	21,265	23,118	20,663
Recorded Investment With Allowance	0	0	0	0	0	0
Total Recorded Investment	21,265	20,663	23,118	21,265	23,118	20,663
Related Allowance	0	0	0	0	0	0
Average Recorded Investment	20,697	21,890	23,562	21,380	29,904	28,057
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Contractual Principal Balance	532,285	456,106	436,515	532,285	436,515	456,106
Residential Real Estate [Member] | Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Contractual Principal Balance	18,097	22,860	20,331	18,097	20,331	22,860
Recorded Investment With No Allowance	14,605	18,054	18,430	14,605	18,430	18,054
Recorded Investment With Allowance	0	0	0	0	0	0
Total Recorded Investment	14,605	18,054	18,430	14,605	18,430	18,054
Related Allowance	0	0	0	0	0	0
Average Recorded Investment	14,881	18,242	19,112	16,465	21,456	20,776
Consumer Installment [Member] | Covered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Contractual Principal Balance	126	124	134	126	134	124
Recorded Investment With No Allowance	92	94	105	92	105	94
Recorded Investment With Allowance	0	0	0	0	0	0
Total Recorded Investment	92	94	105	92	105	94
Related Allowance	0	0	0	0	0	0
Average Recorded Investment	$ 101	$ 100	$ 116	$ 96	$ 177	$ 160