INTEREST-BEARING DEPOSITS AND SECURITIES (Available-for-sale Securities with Continuous Loss Position) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 U.S. Government and agency obligations [Member]	Mar. 31, 2012 U.S. Government and agency obligations [Member]	Mar. 31, 2013 Total municipal bonds [Member]	Mar. 31, 2012 Total municipal bonds [Member]	Mar. 31, 2013 Taxable municipal bonds [Member]	Mar. 31, 2012 Taxable municipal bonds [Member]	Mar. 31, 2013 Tax exempt municipal bonds [Member]	Mar. 31, 2012 Tax exempt municipal bonds [Member]	Mar. 31, 2013 Corporate bonds [Member]	Mar. 31, 2012 Corporate bonds [Member]	Mar. 31, 2013 Total mortgage-backed or related securities [Member]	Mar. 31, 2012 Total mortgage-backed or related securities [Member]	Mar. 31, 2013 1-4 residential agency guaranteed [Member]	Mar. 31, 2012 1-4 residential agency guaranteed [Member]	Mar. 31, 2013 Multifamily agency guaranteed [Member]	Mar. 31, 2012 Multifamily agency guaranteed [Member]	Mar. 31, 2012 Multifamily other [Member]	Mar. 31, 2013 Asset-backed Securities [Member]	Dec. 31, 2012 Asset-backed Securities [Member]	Mar. 31, 2013 SLMA [Member]	Mar. 31, 2012 SLMA [Member]	Mar. 31, 2013 Other asset-backed securities [Member]	Dec. 31, 2012 Other asset-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 Months, Fair Value	$ 149,135	$ 136,877	$ 15,964	$ 22,955	$ 22,350	$ 15,628	$ 11,776	$ 11,009	$ 10,574	$ 4,619	$ 3,179	$ 6,670	$ 72,930	$ 71,908	$ 23,923	$ 32,459	$ 49,007	$ 32,170	$ 7,279	$ 34,712	$ 19,716	$ 16,451	$ 9,674	$ 18,261	$ 10,042
Less than 12 Months, Unrealized Losses	(812)	(988)	(38)	(53)	(92)	(78)	(39)	(67)	(53)	(11)	(1)	(9)	(592)	(774)	(309)	(503)	(283)	(226)	(45)	(89)	(74)	(17)	(45)	(72)	(29)
12 Months or More, Fair Value	11,180	5,746	0	0	382	0	0	0	382	0	0	0	10,798	5,746	10,798	5,746	0	0	0	0	0	0	0	0	0
12 Months or Longer, Unrealized Losses	(244)	(81)	0	0	(1)	0	0	0	(1)	0	0	0	(243)	(81)	(243)	(81)	0	0	0	0	0	0	0	0	0
Total Fair Value	160,315	142,623	15,964	22,955	22,732	15,628	11,776	11,009	10,956	4,619	3,179	6,670	83,728	77,654	34,721	38,205	49,007	32,170	7,279	34,712	19,716	16,451	9,674	18,261	10,042
Unrealized Losses	$ (1,056)	$ (1,069)	$ (38)	$ (53)	$ (93)	$ (78)	$ (39)	$ (67)	$ (54)	$ (11)	$ (1)	$ (9)	$ (835)	$ (855)	$ (552)	$ (584)	$ (283)	$ (226)	$ (45)	$ (89)	$ (74)	$ (17)	$ (45)	$ (72)	$ (29)