ALLOWANCE FOR LOAN LOSSES AND RESERVE FOR FIRST LOSS POSITION, First Loss Position and Related Reserve Liability (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reserve For First Loss Position [Abstract]
Outstanding balance of multifamily loans serviced for FNMA at period end		$ 0	$ 0	$ 208,375
Total First Loss Position at end of period		0	0	15,428
Reserve Liability On The First Loss Position [Roll Forward]
Balance at beginning of period		0	1,040	1,383
Credit for losses on problem loans(1)	[1]	0	(1,040)	(305)
Charge-offs		0	0	(38)
Balance at end of period		$ 0	$ 0	1,040
Reduction of First Loss Position From Loan Payoff				$ 0

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