FEDERAL HOME LOAN BANK ADVANCES AND OTHER BORROWINGS (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
FEDERAL HOME LOAN BANK ADVANCES AND OTHER BORROWINGS [Abstract]
Advances from Federal Home Loan Banks	$ 83,692	$ 83,700
FHLB interest rate	1.78%	1.78%
Advances with fixed maturity dates	$ 71,700
Weighted average interest rate on fixed maturity advances	1.57%
Residential mortgages pledged as collateral for advances	$ 382,400
Multifamily mortgage loans pledged as collateral for advances	961,300
Callable variable rate advances	$ 12,000
Weighted average interest rate on variable advances (in percent)	3.01%
Investment pledges against advances	$ 17,600
Overnight borrowings of debt	$ 21,100	$ 40,700
Average interest rate of FHLB advances	0.49%	0.52%