LOANS AND ALLOWANCE FOR LOAN LOSSES (Troubled Debt Restructurings on Performing Financing Receivables) (Details) - Performing Troubled Debt Restructurings [Member] - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Modifications [Line Items]
Total performing troubled debt restructuring	$ 76,490	$ 80,619
Commercial, financial and agricultural [Member]
Financing Receivable, Modifications [Line Items]
Total performing troubled debt restructuring	0	284
Real estate construction and development [Member]
Financing Receivable, Modifications [Line Items]
Total performing troubled debt restructuring	0	342
One-to-four-family residential [Member]
Financing Receivable, Modifications [Line Items]
Total performing troubled debt restructuring	76,490	76,228
Commercial real estate [Member]
Financing Receivable, Modifications [Line Items]
Total performing troubled debt restructuring	$ 0	$ 3,765