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
	Mar. 31, 2014	Mar. 31, 2013
Allowance for loan losses:
Balance, beginning of period	$ 81,033	$ 91,602
Charge-offs	(3,447)	(6,883)
Recoveries	2,245	3,451
Provision (benefit) for loan losses	0	0
Balance, end of period	79,831	88,170
Commercial and Industrial [Member]
Allowance for loan losses:
Balance, beginning of period	13,401	13,572
Charge-offs	(1,622)	(676)
Recoveries	752	1,067
Provision (benefit) for loan losses	1,340	205
Balance, end of period	13,871	14,168
Real Estate Construction and Development [Member]
Allowance for loan losses:
Balance, beginning of period	7,407	14,434
Charge-offs	(30)	(282)
Recoveries	600	395
Provision (benefit) for loan losses	(891)	(1,544)
Balance, end of period	7,086	13,003
One-to-Four-Family Residential [Member]
Allowance for loan losses:
Balance, beginning of period	32,619	38,897
Charge-offs	(1,426)	(4,389)
Recoveries	791	1,231
Provision (benefit) for loan losses	(764)	921
Balance, end of period	31,220	36,660
Multi-family residential [Member]
Allowance for loan losses:
Balance, beginning of period	5,249	4,252
Charge-offs	(132)	(3)
Recoveries	7	0
Provision (benefit) for loan losses	145	(47)
Balance, end of period	5,269	4,202
Commercial Real Estate [Member]
Allowance for loan losses:
Balance, beginning of period	22,052	20,048
Charge-offs	(188)	(1,477)
Recoveries	57	718
Provision (benefit) for loan losses	122	431
Balance, end of period	22,043	19,720
Consumer and installment [Member]
Allowance for loan losses:
Balance, beginning of period	305	399
Charge-offs	(49)	(56)
Recoveries	38	40
Provision (benefit) for loan losses	48	34
Balance, end of period	$ 342	$ 417