FEDERAL HOME LOAN BANK ADVANCES AND OTHER BORROWINGS (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Dec. 31, 2015	Jun. 30, 2016
Debt Disclosure [Abstract]
Advances from Federal Home Loan Banks	$ 83,692	$ 83,692
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	$ 428,200	$ 378,900
Multifamily mortgage loans pledged as collateral for advances	1,100,000	1,000,000
Callable variable rate advances	$ 12,000	$ 12,000
Weighted average interest rate on variable advances (in percent)	3.01%	3.01%
Investment pledges against advances		$ 16,600
Overnight borrowings of debt	$ 40,700	$ 29,450
Average interest rate of FHLB advances	0.52%	0.57%