LOANS AND ALLOWANCE FOR LOAN LOSSES (Troubled Debt Restructurings on Performing Financing Receivables) (Details) (Performing Troubled Debt Restructurings [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Modifications [Line Items]
Total performing troubled debt restructuring	$ 78,131	$ 80,619
Commercial, financial and agricultural [Member]
Financing Receivable, Modifications [Line Items]
Total performing troubled debt restructuring	272	284
Real estate construction and development [Member]
Financing Receivable, Modifications [Line Items]
Total performing troubled debt restructuring	319	342
One-to-four-family residential [Member]
Financing Receivable, Modifications [Line Items]
Total performing troubled debt restructuring	77,540	76,228
Commercial real estate [Member]
Financing Receivable, Modifications [Line Items]
Total performing troubled debt restructuring	$ 0	$ 3,765