CASH AND SECURITIES (Available-for-sale Securities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 469,650	$ 462,579
Gross Unrealized Gains	4,339	3,438
Gross Unrealized Losses	(1,069)	(222)
Fair Value	472,920	465,795
Percent of Total	100.00%	100.00%
U.S. Government and agency obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	96,666	338,165
Gross Unrealized Gains	367	862
Gross Unrealized Losses	(53)	(56)
Fair Value	96,980	338,971
Percent of Total	20.50%	72.80%
Total municipal bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	44,562	26,893
Gross Unrealized Gains	454	435
Gross Unrealized Losses	(78)	(18)
Fair Value	44,938	27,310
Percent of Total	9.50%	5.90%
Taxable municipal bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	20,987	10,358
Gross Unrealized Gains	233	225
Gross Unrealized Losses	(67)	(2)
Fair Value	21,153	10,581
Percent of Total	4.50%	2.30%
Tax exempt municipal bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	23,575	16,535
Gross Unrealized Gains	221	210
Gross Unrealized Losses	(11)	(16)
Fair Value	23,785	16,729
Percent of Total	5.00%	3.60%
Corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	10,701	6,240
Gross Unrealized Gains	37	20
Gross Unrealized Losses	(9)	0
Fair Value	10,729	6,260
Percent of Total	2.30%	1.30%
Total Mortgage-backed or related securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	275,341	91,281
Gross Unrealized Gains	3,271	2,121
Gross Unrealized Losses	(855)	(148)
Fair Value	277,757	93,254
Percent of Total	58.70%	20.00%
1-4 residential agency guaranteed [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	87,392	68,922
Gross Unrealized Gains	1,051	1,711
Gross Unrealized Losses	(584)	(133)
Fair Value	87,859	70,500
Percent of Total	18.60%	15.10%
1-4 residential other [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,223	1,735
Gross Unrealized Gains	76	100
Gross Unrealized Losses	0	0
Fair Value	1,299	1,835
Percent of Total	0.30%	0.40%
Multifamily agency guaranteed [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	176,026	20,624
Gross Unrealized Gains	2,140	310
Gross Unrealized Losses	(226)	(15)
Fair Value	177,940	20,919
Percent of Total	37.60%	4.50%
Multifamily other [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	10,700
Gross Unrealized Gains	4
Gross Unrealized Losses	(45)
Fair Value	10,659
Percent of Total	2.20%
SLMA [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	42,380	0
Gross Unrealized Gains	210	0
Gross Unrealized Losses	(74)	0
Fair Value	$ 42,516	$ 0
Percent of Total	9.00%	0.00%