LOANS AND ALLOWANCE FOR LOAN LOSSES (Financing Receivable Credit Quality Indicators) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	$ 2,930,747	$ 3,284,279	$ 4,492,284
Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	1,858,644	2,328,076
One-to-Four-Family Residential Mortgage Bank and Home Equity Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	476,796	535,523
One-to-Four-Family Residential Mortgage Division and Consumer and Installment Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	529,174	389,569
Commercial and Industrial | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	610,301	725,195
Real Estate Construction and Development
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	174,979	249,987
Real Estate Construction and Development | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	174,979	249,987
Multi-family
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	103,684	127,356
Multi-family | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	103,684	127,356
Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	969,680	1,225,538
Commercial Real Estate | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	969,680	1,225,538
Bank Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	122,338	165,578
Bank Portfolio | One-to-Four-Family Residential Mortgage Bank and Home Equity Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	122,338	165,578
Home Equity
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	354,458	369,945
Home Equity | One-to-Four-Family Residential Mortgage Bank and Home Equity Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	354,458	369,945
Mortgage Division Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	509,971	366,915
Mortgage Division Portfolio | One-to-Four-Family Residential Mortgage Division and Consumer and Installment Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	509,971	366,915
Consumer and Installment
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	19,203	22,654
Consumer and Installment | One-to-Four-Family Residential Mortgage Division and Consumer and Installment Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	19,203	22,654
Pass | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	1,543,395	1,706,893
Pass | One-to-Four-Family Residential Mortgage Bank and Home Equity Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	449,946	490,774
Pass | One-to-Four-Family Residential Mortgage Division and Consumer and Installment Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	424,445	285,711
Pass | Commercial and Industrial | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	572,248	606,998
Pass | Real Estate Construction and Development | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	45,356	57,594
Pass | Multi-family | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	67,690	68,748
Pass | Commercial Real Estate | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	858,101	973,553
Pass | Bank Portfolio | One-to-Four-Family Residential Mortgage Bank and Home Equity Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	107,625	131,973
Pass | Home Equity | One-to-Four-Family Residential Mortgage Bank and Home Equity Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	342,321	358,801
Pass | Mortgage Division Portfolio | One-to-Four-Family Residential Mortgage Division and Consumer and Installment Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	405,270	263,079
Pass | Consumer and Installment | One-to-Four-Family Residential Mortgage Division and Consumer and Installment Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	19,175	22,632
Special mention | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	87,326	175,875
Special mention | One-to-Four-Family Residential Mortgage Bank and Home Equity Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	4,621	13,751
Special mention | Commercial and Industrial | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	10,580	25,742
Special mention | Real Estate Construction and Development | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	6,076	11,977
Special mention | Multi-family | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	220	18,678
Special mention | Commercial Real Estate | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	70,450	119,478
Special mention | Bank Portfolio | One-to-Four-Family Residential Mortgage Bank and Home Equity Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	4,405	12,797
Special mention | Home Equity | One-to-Four-Family Residential Mortgage Bank and Home Equity Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	216	954
Substandard | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	104,428	219,674
Substandard | One-to-Four-Family Residential Mortgage Bank and Home Equity Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	5,037	9,368
Substandard | One-to-Four-Family Residential Mortgage Division and Consumer and Installment Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	6,627	4,429
Substandard | Commercial and Industrial | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	8,423	32,851
Substandard | Real Estate Construction and Development | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	81,364	97,158
Substandard | Multi-family | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	773	28,789
Substandard | Commercial Real Estate | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	13,868	60,876
Substandard | Bank Portfolio | One-to-Four-Family Residential Mortgage Bank and Home Equity Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	1,787	6,118
Substandard | Home Equity | One-to-Four-Family Residential Mortgage Bank and Home Equity Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	3,250	3,250
Substandard | Mortgage Division Portfolio | One-to-Four-Family Residential Mortgage Division and Consumer and Installment Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	6,627	4,429
Substandard | Consumer and Installment | One-to-Four-Family Residential Mortgage Division and Consumer and Installment Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	0	0
Performing troubled debt restructuring | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	49,012	43,813
Performing troubled debt restructuring | One-to-Four-Family Residential Mortgage Bank and Home Equity Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	1,611
Performing troubled debt restructuring | One-to-Four-Family Residential Mortgage Division and Consumer and Installment Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	78,294	82,629
Performing troubled debt restructuring | Commercial and Industrial | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	0	4,264
Performing troubled debt restructuring | Real Estate Construction and Development | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	10,031	12,014
Performing troubled debt restructuring | Multi-family | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	28,240	3,166
Performing troubled debt restructuring | Commercial Real Estate | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	10,741	24,369
Performing troubled debt restructuring | Bank Portfolio | One-to-Four-Family Residential Mortgage Bank and Home Equity Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	1,611
Performing troubled debt restructuring | Home Equity | One-to-Four-Family Residential Mortgage Bank and Home Equity Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	0
Performing troubled debt restructuring | Mortgage Division Portfolio | One-to-Four-Family Residential Mortgage Division and Consumer and Installment Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	78,294	82,629
Performing troubled debt restructuring | Consumer and Installment | One-to-Four-Family Residential Mortgage Division and Consumer and Installment Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	0	0
Nonaccrual | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	74,483	181,821
Nonaccrual | One-to-Four-Family Residential Mortgage Bank and Home Equity Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	15,581	21,630
Nonaccrual | One-to-Four-Family Residential Mortgage Division and Consumer and Installment Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	19,808	16,800
Nonaccrual | Commercial and Industrial | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	19,050	55,340
Nonaccrual | Real Estate Construction and Development | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	32,152	71,244
Nonaccrual | Multi-family | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	6,761	7,975
Nonaccrual | Commercial Real Estate | Commercial Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	16,520	47,262
Nonaccrual | Bank Portfolio | One-to-Four-Family Residential Mortgage Bank and Home Equity Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	6,910	14,690
Nonaccrual | Home Equity | One-to-Four-Family Residential Mortgage Bank and Home Equity Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	8,671	6,940
Nonaccrual | Mortgage Division Portfolio | One-to-Four-Family Residential Mortgage Division and Consumer and Installment Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	19,780	16,778
Nonaccrual | Consumer and Installment | One-to-Four-Family Residential Mortgage Division and Consumer and Installment Loan Portfolio
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans and leases receivable, net of deferred income	$ 28	$ 22