LOANS AND ALLOWANCE FOR LOAN LOSSES (Allowance for Credit Losses on Financing Receivables By Portfolio Segments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Allowance for loan losses:
Balance, beginning of period	$ 58,816	$ 78,018	$ 66,874	$ 81,033
Charge-offs	(1,189)	(2,234)	(8,284)	(11,921)
Recoveries	2,142	3,910	8,679	10,582
Provision (benefit) for loan losses	0	(5,000)	(7,500)	(5,000)
Balance, end of period	59,769	74,694	59,769	74,694
Commercial and Industrial [Member]
Allowance for loan losses:
Balance, beginning of period	11,321	13,731	12,574	13,401
Charge-offs	(888)	(399)	(4,992)	(3,015)
Recoveries	1,095	1,763	3,520	3,778
Provision (benefit) for loan losses	(539)	(1,236)	(113)	(305)
Balance, end of period	10,989	13,859	10,989	13,859
Real Estate Construction and Development [Member]
Allowance for loan losses:
Balance, beginning of period	2,231	6,600	3,490	7,407
Charge-offs	0	(2)	(178)	(67)
Recoveries	383	114	685	1,470
Provision (benefit) for loan losses	(247)	(3,979)	(1,630)	(6,077)
Balance, end of period	2,367	2,733	2,367	2,733
One-to-Four-Family Residential [Member]
Allowance for loan losses:
Balance, beginning of period	22,403	29,145	24,055	32,619
Charge-offs	(172)	(1,316)	(1,899)	(4,943)
Recoveries	544	938	1,957	3,207
Provision (benefit) for loan losses	(1,764)	335	(3,102)	(1,781)
Balance, end of period	21,011	29,102	21,011	29,102
Multi-family residential [Member]
Allowance for loan losses:
Balance, beginning of period	3,430	7,374	5,630	5,249
Charge-offs	(29)	(71)	(227)	(3,155)
Recoveries	3	114	2,236	123
Provision (benefit) for loan losses	(29)	340	(4,264)	5,540
Balance, end of period	3,375	7,757	3,375	7,757
Commercial Real Estate [Member]
Allowance for loan losses:
Balance, beginning of period	19,349	20,820	20,983	22,052
Charge-offs	(73)	(436)	(918)	(645)
Recoveries	56	946	177	1,918
Provision (benefit) for loan losses	2,621	(415)	1,711	(2,410)
Balance, end of period	21,953	20,915	21,953	20,915
Consumer and installment [Member]
Allowance for loan losses:
Balance, beginning of period	82	348	142	305
Charge-offs	(27)	(10)	(70)	(96)
Recoveries	61	35	104	86
Provision (benefit) for loan losses	(42)	(45)	(102)	33
Balance, end of period	$ 74	$ 328	$ 74	$ 328