LOANS AND ALLOWANCE FOR LOAN LOSSES (Allowance for Credit Losses on Financing Receivables By Portfolio Segments) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Allowance for loan losses:
Balance, beginning of period	$ 78,018	$ 85,633	$ 81,033	$ 91,602
Charge-offs	(2,234)	(7,040)	(11,921)	(20,794)
Recoveries	3,910	5,684	10,582	13,469
(Benefit) provision for loan losses	(5,000)	0	(5,000)	0
Balance, end of period	74,694	84,277	74,694	84,277
Commercial and Industrial [Member]
Allowance for loan losses:
Balance, beginning of period	13,731	13,966	13,401	13,572
Charge-offs	(399)	(2,241)	(3,015)	(3,927)
Recoveries	1,763	1,773	3,778	3,863
(Benefit) provision for loan losses	(1,236)	526	(305)	516
Balance, end of period	13,859	14,024	13,859	14,024
Real Estate Construction and Development [Member]
Allowance for loan losses:
Balance, beginning of period	6,600	11,412	7,407	14,434
Charge-offs	(2)	0	(67)	(448)
Recoveries	114	2,557	1,470	4,273
(Benefit) provision for loan losses	(3,979)	(4,967)	(6,077)	(9,257)
Balance, end of period	2,733	9,002	2,733	9,002
One-to-Four-Family Residential [Member]
Allowance for loan losses:
Balance, beginning of period	29,145	35,266	32,619	38,897
Charge-offs	(1,316)	(2,256)	(4,943)	(10,983)
Recoveries	938	879	3,207	3,398
(Benefit) provision for loan losses	335	824	(1,781)	3,401
Balance, end of period	29,102	34,713	29,102	34,713
Multi-family residential [Member]
Allowance for loan losses:
Balance, beginning of period	7,374	4,122	5,249	4,252
Charge-offs	(71)	0	(3,155)	(162)
Recoveries	114	0	123	141
(Benefit) provision for loan losses	340	39	5,540	(70)
Balance, end of period	7,757	4,161	7,757	4,161
Commercial Real Estate [Member]
Allowance for loan losses:
Balance, beginning of period	20,820	20,573	22,052	20,048
Charge-offs	(436)	(2,488)	(645)	(5,121)
Recoveries	946	443	1,918	1,683
(Benefit) provision for loan losses	(415)	3,551	(2,410)	5,469
Balance, end of period	20,915	22,079	20,915	22,079
Consumer and installment [Member]
Allowance for loan losses:
Balance, beginning of period	348	294	305	399
Charge-offs	(10)	(55)	(96)	(153)
Recoveries	35	32	86	111
(Benefit) provision for loan losses	(45)	27	33	(59)
Balance, end of period	$ 328	$ 298	$ 328	$ 298