INTEREST-BEARING DEPOSITS AND SECURITIES (Available-for-sale Securities) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	$ 481,867	$ 469,650
Gross Unrealized Gains	1,896	4,339
Gross Unrealized Losses	(6,356)	(1,069)
Fair Value	477,407	472,920
Percent of Total	100.00%	100.00%
U.S. Government and agency obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	59,217	96,666
Gross Unrealized Gains	173	367
Gross Unrealized Losses	(622)	(53)
Fair Value	58,768	96,980
Percent of Total	12.30%	20.50%
Total municipal bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	55,516	44,562
Gross Unrealized Gains	273	454
Gross Unrealized Losses	(474)	(78)
Fair Value	55,315	44,938
Percent of Total	11.60%	9.50%
Taxable municipal bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	25,669	20,987
Gross Unrealized Gains	113	233
Gross Unrealized Losses	(230)	(67)
Fair Value	25,552	21,153
Percent of Total	5.40%	4.50%
Tax exempt municipal bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	29,847	23,575
Gross Unrealized Gains	160	221
Gross Unrealized Losses	(244)	(11)
Fair Value	29,763	23,785
Percent of Total	6.20%	5.00%
Corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	9,006	10,701
Gross Unrealized Gains	13	37
Gross Unrealized Losses	(19)	(9)
Fair Value	9,000	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	332,489	275,341
Gross Unrealized Gains	1,337	3,271
Gross Unrealized Losses	(4,751)	(855)
Fair Value	329,075	277,757
Percent of Total	68.90%	58.70%
1-4 residential agency guaranteed [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	46,162	87,392
Gross Unrealized Gains	807	1,051
Gross Unrealized Losses	(940)	(584)
Fair Value	46,029	87,859
Percent of Total	9.60%	18.60%
1-4 residential other [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	1,025	1,223
Gross Unrealized Gains	75	76
Gross Unrealized Losses	0	0
Fair Value	1,100	1,299
Percent of Total	0.20%	0.30%
Multifamily agency guaranteed [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	274,674	176,026
Gross Unrealized Gains	455	2,140
Gross Unrealized Losses	(3,285)	(226)
Fair Value	271,844	177,940
Percent of Total	57.00%	37.60%
Multifamily other [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	10,628	10,700
Gross Unrealized Gains	0	4
Gross Unrealized Losses	(526)	(45)
Fair Value	10,102	10,659
Percent of Total	2.10%	2.20%
Asset-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	25,639	42,380
Gross Unrealized Gains	100	210
Gross Unrealized Losses	(490)	(74)
Fair Value	25,249	42,516
Percent of Total	5.30%	9.00%
SLMA [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost Basis	15,576	32,309
Gross Unrealized Gains	100	210
Gross Unrealized Losses	0	(45)
Fair Value	15,676	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	10,063	10,071
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(490)	(29)
Fair Value	$ 9,573	$ 10,042
Percent of Total	2.00%	2.10%