ALLOWANCE FOR LOAN LOSSES AND RESERVE FOR FIRST LOSS POSITION, First Loss Position and Related Reserve Liability (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Reserve For First Loss Position [Abstract]
Outstanding balance of multifamily loans serviced for FNMA at period end	$ 0		$ 208,375		$ 256,731
Total First Loss Position at end of period	0		15,428		15,428
Reserve Liability On The First Loss Position [Roll Forward]
Balance at beginning of period	1,040		1,383		2,993
Credit for losses on problem loans(1)	(1,040)	[1]	(305)	[1]	(1,286)	[1]
Charge-offs	0		(38)		(324)
Balance at end of period	0		1,040		1,383
Reduction of First Loss Position From Loan Payoff					$ 928

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