LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 4) (Performing Troubled Debt Restructurings [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Financing Receivable, Modifications [Line Items]
Total performing troubled debt restructuring	$ 126,602	$ 128,917
Real estate construction and development [Member]
Financing Receivable, Modifications [Line Items]
Total performing troubled debt restructuring	10,031	10,031
One-to-four-family residential [Member]
Financing Receivable, Modifications [Line Items]
Total performing troubled debt restructuring	78,551	79,905
Multi-family residential [Member]
Financing Receivable, Modifications [Line Items]
Total performing troubled debt restructuring	28,194	28,240
Commercial real estate [Member]
Financing Receivable, Modifications [Line Items]
Total performing troubled debt restructuring	$ 9,826	$ 10,741