BUSINESS COMBINATIONS (Details) (USD $)	0 Months Ended
	Feb. 14, 2014 location	Feb. 14, 2015	Dec. 14, 2014 location	Dec. 12, 2014	Dec. 31, 2014	Dec. 31, 2013
Business combinations
Number of service branches after acquisition	29
Preliminary fair value of the assets acquired and liabilities assumed
Goodwill Recorded on Acquisition					$ 9,450,000	$ 2,034,000
FNBNY
Business combinations
Total acquired assets	211,949,000
Number of shares exchanged (in shares)		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		6,300,000
Period after the acquisition used to calculate post-closing adjustments		2 years
Preliminary fair value of the assets acquired and liabilities assumed
Cash and due from banks	1,883,000
Interest earning deposits with banks	1,044,000
Securities	103,192,000
Loans	89,714,000
Premises and equipment	1,787,000
Core deposit intangible	951,000
Other assets	13,378,000
Total Assets Acquired	211,949,000
Deposits	169,873,000
Federal Home Loan Bank term advances	39,282,000
Unsecured debt	1,450,000
Other liabilities and accrued expenses	2,620,000
Total Liabilities Assumed	213,225,000
Net Assets Acquired/(Liabilities Assumed)	(1,276,000)
Consideration Paid	6,140,000
Goodwill Recorded on Acquisition	7,416,000
Total Assets to be acquired	211,900,000
Purchase price		6,100,000
FNBNY | As Initially Reported
Business combinations
Total acquired assets	209,908,000
Preliminary fair value of the assets acquired and liabilities assumed
Cash and due from banks	1,883,000
Interest earning deposits with banks	1,044,000
Securities	103,192,000
Loans	87,390,000
Premises and equipment	1,787,000
Core deposit intangible	1,930,000
Other assets	12,682,000
Total Assets Acquired	209,908,000
Deposits	169,873,000
Federal Home Loan Bank term advances	39,282,000
Unsecured debt	1,450,000
Other liabilities and accrued expenses	1,825,000
Total Liabilities Assumed	212,430,000
Net Assets Acquired/(Liabilities Assumed)	(2,522,000)
Consideration Paid	6,140,000
Goodwill Recorded on Acquisition	8,662,000
FNBNY | Measurement Period Adjustments
Business combinations
Total acquired assets	2,041,000
Preliminary fair value of the assets acquired and liabilities assumed
Loans	2,324,000
Core deposit intangible	(979,000)
Other assets	696,000
Total Assets Acquired	2,041,000
Other liabilities and accrued expenses	795,000
Total Liabilities Assumed	795,000
Net Assets Acquired/(Liabilities Assumed)	1,246,000
Goodwill Recorded on Acquisition	(1,246,000)
CNB
Business combinations
Total acquired assets			951,000,000
Number of service branches after acquisition			11
Preliminary fair value of the assets acquired and liabilities assumed
Loans			761,000,000
Total Assets Acquired			951,000,000
Deposits			829,000,000
Average closing stock price (in dollars per share)				$ 25.35
Estimated value of the merger transaction			$ 141,000,000