SECURITIES - NARRATIVE (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended			12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2012		Dec. 31, 2011	Jun. 30, 2011	Jun. 30, 2012
Marketable Securities [Line Items]
Securities available for sale	$ 167,167			$ 167,167				$ 164,159
Held-to-maturity Securities, Transfers [Abstract]
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount	288,452			288,452				313,032
Held-to-maturity and Available-for-sale Securities Pledged as Collateral	229,066			229,066				215,199
Certain Loans Acquired in Transfer Accounted for as Debt Securities [Abstract]
Other than Temporary Impairment Losses, Investments	2,873		715	5,745		1,432	0
Non-agency
Marketable Securities [Line Items]
Securities available for sale	69,883	[1]		69,883	[1]			83,127	[1]
RMBS, Super Senior Securities
Marketable Securities [Line Items]
Securities available for sale	42,619			42,619
Available-for-sale, Number of Securities (in number of securities)	25			25
Held-to-maturity Securities, Transfers [Abstract]
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount	188,428			188,428
Held-to-maturity, Number of Securities	81			81
RMBS, Senior Structured Whole Loan Securities
Marketable Securities [Line Items]
Securities available for sale	27,219			27,219
Available-for-sale, Number of Securities (in number of securities)	2			2
RMBS, Mezzanine Z-Tranche Securities
Marketable Securities [Line Items]
Securities available for sale	45			45
Available-for-sale, Number of Securities (in number of securities)	3			3
RMBS, Senior-Support Securities
Held-to-maturity Securities, Transfers [Abstract]
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount	3,598			3,598
Held-to-maturity, Number of Securities	1			1
Certain Loans Acquired in Transfer Accounted for as Debt Securities [Abstract]
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Number (in number of securities)	1			1
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Cost	17,740			17,740
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Carrying Amount, Net	0			0
RMBS, Senior-Support Securities | Scenario, Previously Reported
Certain Loans Acquired in Transfer Accounted for as Debt Securities [Abstract]
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Carrying Amount, Net	30,560			30,560
RMBS, Senior-Support Securities | Scenario, Forecast
Certain Loans Acquired in Transfer Accounted for as Debt Securities [Abstract]
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield	9,015			9,015
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Nonaccretable Yield	3,805			3,805
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Amortizable Premium				0
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Nonamortizable Premium				3,724
Non-Agency, Residential Mortgage Backed Securities [Member]
Held-to-maturity Securities, Transfers [Abstract]
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount	$ 192,026			$ 192,026				$ 209,804

[1] Private sponsors of securities collateralized primarily by pools of 1-4 family residential first mortgages . Primarily supersenior securities secured by prime, Alt-A or pay-option ARM mortgages.