FHLBNY CAPITAL STOCK (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
FHLBNY CAPITAL STOCK [Abstract]
Par value of FHLBNY capital stock (in dollars per share)	$ 100
Bank owned FHLBNY shares (in shares)	596,959	444,439
Dividends income recognized on FHLBNY capital stock	$ 2,555	$ 2,501	$ 2,226