ALLOWANCE FOR LOAN LOSSES AND RESERVE FOR FIRST LOSS POSITION (2) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Reserve For First Loss Position [Abstract]
Outstanding balance of multifamily loans serviced for FNMA at period end	$ 256,731		$ 308,104		$ 371,887
Total First Loss Position at end of period	15,428		16,356		16,789
Reserve Liability On The First Loss Position [Roll Forward]
Balance at beginning of period	2,993		2,993		4,373
First Loss Reserve Transfer For Loans Reacquired	0		0		(1,123)
Credit for losses on problem loans(1)	(1,286)	[1]	0	[1]	0	[1]
Charge-offs	(342)		0		(257)
Balance at end of period	1,383		2,993		2,993
First Loss Position Reserve Approved Reduction			433		3,457
Reduction of First Loss Position From Loan Payoff	$ 928

[1] 1 Amount recognized as a portion of mortgage banking income during the period.