INTEREST-BEARING DEPOSITS AND SECURITIES (Available-for-sale Securities with Continuous Loss Position) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	$ 292,607	$ 136,877
Less than 12 Months, Unrealized Losses	(5,623)	(988)
12 Months or More, Fair Value	22,897	5,746
12 Months or Longer, Unrealized Losses	(733)	(81)
Total Fair Value	315,504	142,623
Unrealized Losses	(6,356)	(1,069)
U.S. Government and agency obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	40,637	22,955
Less than 12 Months, Unrealized Losses	(622)	(53)
12 Months or More, Fair Value	0	0
12 Months or Longer, Unrealized Losses	0	0
Total Fair Value	40,637	22,955
Unrealized Losses	(622)	(53)
Total municipal bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	29,119	15,628
Less than 12 Months, Unrealized Losses	(473)	(78)
12 Months or More, Fair Value	379	0
12 Months or Longer, Unrealized Losses	(1)	0
Total Fair Value	29,498	15,628
Unrealized Losses	(474)	(78)
Taxable municipal bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	17,756	11,009
Less than 12 Months, Unrealized Losses	(230)	(67)
12 Months or More, Fair Value	0	0
12 Months or Longer, Unrealized Losses	0	0
Total Fair Value	17,756	11,009
Unrealized Losses	(230)	(67)
Tax exempt municipal bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	11,363	4,619
Less than 12 Months, Unrealized Losses	(243)	(11)
12 Months or More, Fair Value	379	0
12 Months or Longer, Unrealized Losses	(1)	0
Total Fair Value	11,742	4,619
Unrealized Losses	(244)	(11)
Corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	4,981	6,670
Less than 12 Months, Unrealized Losses	(19)	(9)
12 Months or More, Fair Value	0	0
12 Months or Longer, Unrealized Losses	0	0
Total Fair Value	4,981	6,670
Unrealized Losses	(19)	(9)
Total mortgage-backed or related securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	208,297	71,908
Less than 12 Months, Unrealized Losses	(4,019)	(774)
12 Months or More, Fair Value	22,518	5,746
12 Months or Longer, Unrealized Losses	(732)	(81)
Total Fair Value	230,815	77,654
Unrealized Losses	(4,751)	(855)
1-4 residential agency guaranteed [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	4,133	32,459
Less than 12 Months, Unrealized Losses	(274)	(503)
12 Months or More, Fair Value	19,478	5,746
12 Months or Longer, Unrealized Losses	(666)	(81)
Total Fair Value	23,611	38,205
Unrealized Losses	(940)	(584)
Multifamily agency guaranteed [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	194,062	32,170
Less than 12 Months, Unrealized Losses	(3,219)	(226)
12 Months or More, Fair Value	3,040	0
12 Months or Longer, Unrealized Losses	(66)	0
Total Fair Value	197,102	32,170
Unrealized Losses	(3,285)	(226)
Multifamily other [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	10,102	7,279
Less than 12 Months, Unrealized Losses	(526)	(45)
12 Months or More, Fair Value	0	0
12 Months or Longer, Unrealized Losses	0	0
Total Fair Value	10,102	7,279
Unrealized Losses	(526)	(45)
Asset-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	9,573	19,716
Less than 12 Months, Unrealized Losses	(490)	(74)
12 Months or More, Fair Value	0	0
12 Months or Longer, Unrealized Losses	0	0
Total Fair Value	9,573	19,716
Unrealized Losses	(490)	(74)
SLMA [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value		9,674
Less than 12 Months, Unrealized Losses		(45)
12 Months or More, Fair Value		0
12 Months or Longer, Unrealized Losses		0
Total Fair Value		9,674
Unrealized Losses		(45)
Other asset-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	9,573	10,042
Less than 12 Months, Unrealized Losses	(490)	(29)
12 Months or More, Fair Value	0	0
12 Months or Longer, Unrealized Losses	0	0
Total Fair Value	9,573	10,042
Unrealized Losses	$ (490)	$ (29)