COMMITMENTS, CONTINGENT LIABILITIES AND RESTRICTIONS (Details) (USD $)	3 Months Ended
	Sep. 30, 2014	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount of commitments and contingencies		$ 757,743,000	$ 729,353,000
Unused lines of credit		25,000,000
Federal Home Loan Bank unused borrowing capacity		800,000,000
Federal Reserve Bank unused borrowing capacity		9,800,000
Federal Reserve required average total reserve		64,100,000
Federal Reserve Bank of New York reserve requirement represented by cash on hand		60,000,000
Required deposit with Federal Reserve Bank of New York		4,100,000
Range of reasonably possible losses for such matters in the aggregate, beyond the existing recorded liability, lower range		0
Range of reasonably possible losses for such matters in the aggregate, beyond the existing recorded liability, upper range		1,000,000
Litigation settlement charge	2,800,000
Commitments to Extend Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount of commitments and contingencies		733,827,000	704,904,000
Standby Letters of Credit [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract amount of commitments and contingencies		$ 23,916,000	$ 24,449,000