SUBSEQUENT EVENTS (Details) (Subsequent events, USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended
	Feb. 14, 2014 item
Nassau County
SUBSEQUENT EVENTS
Number of full service banking centers operated	2
Western Suffolk County
SUBSEQUENT EVENTS
Number of full service banking centers operated	1
FNBNY
SUBSEQUENT EVENTS
Purchase price	$ 6.1
Number of shares issued	240,598
Post-closing adjustments as a percentage of the net recoveries of principal of certain identified problem loans	60.00%
Identified problem loans used to calculate post-closing adjustments	6.3
Period after the acquisition used to calculate post-closing adjustments	2 years
Total assets	218
Loans	105
Deposits	$ 169
Number of full service banking centers operated	3