INTEREST-BEARING DEPOSITS AND SECURITIES (Available-for-sale Securities) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Document Period End Date	Jun. 30, 2013
Amortized Cost Basis	$ 474,837	$ 469,650
Gross Unrealized Gains	1,725	4,339
Gross Unrealized Losses	(7,425)	(1,069)
Fair Value	469,137	472,920
Percent of Total	99.90%	100.10%
U.S. Government and agency obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	58,548	96,666
Gross Unrealized Gains	202	367
Gross Unrealized Losses	(851)	(53)
Fair Value	57,899	96,980
Percent of Total	12.30%	20.50%
Total municipal bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	56,011	44,562
Gross Unrealized Gains	275	454
Gross Unrealized Losses	(525)	(78)
Fair Value	55,761	44,938
Percent of Total	11.90%	9.50%
Taxable municipal bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	25,837	20,987
Gross Unrealized Gains	125	233
Gross Unrealized Losses	(231)	(67)
Fair Value	25,731	21,153
Percent of Total	5.50%	4.50%
Tax exempt municipal bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	30,174	23,575
Gross Unrealized Gains	150	221
Gross Unrealized Losses	(294)	(11)
Fair Value	30,030	23,785
Percent of Total	6.40%	5.00%
Corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	9,011	10,701
Gross Unrealized Gains	22	37
Gross Unrealized Losses	(39)	(9)
Fair Value	8,994	10,729
Percent of Total	1.90%	2.30%
Total mortgage-backed or related securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	325,611	275,341
Gross Unrealized Gains	1,226	3,271
Gross Unrealized Losses	(5,310)	(855)
Fair Value	321,527	277,757
Percent of Total	68.50%	58.80%
1-4 residential agency guaranteed [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	34,496	87,392
Gross Unrealized Gains	720	1,051
Gross Unrealized Losses	(1,077)	(584)
Fair Value	34,139	87,859
Percent of Total	7.30%	18.60%
1-4 residential other [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	1,052	1,223
Gross Unrealized Gains	77	76
Gross Unrealized Losses	0	0
Fair Value	1,129	1,299
Percent of Total	0.20%	0.30%
Multifamily agency guaranteed [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	279,410	176,026
Gross Unrealized Gains	429	2,140
Gross Unrealized Losses	(3,639)	(226)
Fair Value	276,200	177,940
Percent of Total	58.90%	37.60%
Multifamily other [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	10,653	10,700
Gross Unrealized Gains	0	4
Gross Unrealized Losses	(594)	(45)
Fair Value	10,059	10,659
Percent of Total	2.20%	2.20%
Asset-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	25,656	42,380
Gross Unrealized Gains	0	210
Gross Unrealized Losses	(700)	(74)
Fair Value	24,956	42,516
Percent of Total	5.30%	9.00%
SLMA [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	15,591	32,309
Gross Unrealized Gains	0	210
Gross Unrealized Losses	(94)	(45)
Fair Value	15,497	32,474
Percent of Total	3.30%	6.90%
Other asset-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	10,065	10,071
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(606)	(29)
Fair Value	$ 9,459	$ 10,042
Percent of Total	2.00%	2.10%